diff --git a/libacc/Android.mk b/libacc/Android.mk
new file mode 100644
index 0000000..2b4998e
--- /dev/null
+++ b/libacc/Android.mk
@@ -0,0 +1,31 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+# Shared library for target
+# ========================================================
+
+LOCAL_MODULE:= libacc
+LOCAL_SRC_FILES := acc.cpp
+
+LOCAL_SHARED_LIBRARIES := libdl libcutils
+
+include $(BUILD_SHARED_LIBRARY)
+
+# Shared library for host
+# ========================================================
+
+include $(CLEAR_VARS)
+LOCAL_MODULE:= libacc
+LOCAL_SRC_FILES := acc.cpp
+
+LOCAL_CFLAGS := -O0 -g
+
+LOCAL_STATIC_LIBRARIES := libcutils
+LOCAL_LDLIBS := -ldl
+
+include $(BUILD_HOST_SHARED_LIBRARY)
+
+# Build children
+# ========================================================
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/libacc/FEATURES b/libacc/FEATURES
new file mode 100644
index 0000000..97a876d
--- /dev/null
+++ b/libacc/FEATURES
@@ -0,0 +1,83 @@
+
+Supported C language subset:
+
+    - Expressions:
+
+        * binary operators, by decreasing priority order: '*' '/' '%',
+          '+' '-', '>>' '<<', '<' '<=' '>' '>=', '==' '!=', '&',
+          '^', '|', '=', '&&', '||'.
+
+        * '&&' and '||' have the same semantics as C : left to right
+          evaluation and early exit.
+
+        * Parenthesis are supported.
+
+        * Comma operator is supported.
+
+        * Trinary operator (?:) is not supported.
+
+        * Unary operators: '&', '*' (pointer indirection), '-'
+          (negation), '+', '!', '~', '++' and '--'.
+
+        * Pointer indirection ('*') is supported.
+
+        * Square brackets can be used for pointer arithmetic.
+
+        * '=' and <op>= are supported.
+
+        * Function calls are supported with standard Linux calling
+          convention. Function pointers are supported.
+          Functions can be used before being declared.
+
+        - sizeof() is not supported.
+
+    - Types:
+        + int, short, char, float, double
+        + pointers
+        + variables can be initialized in declarations.
+        + Only ANSI-style function declarations are supported.
+           - "..." is not supported.
+        - short is not supported
+        - const is not supported
+        - arrays are not supported
+        - long doubles are not supported
+        - structs are not supported
+
+    - Unknown functions and variables are bound at compile time by calling
+      back to the caller. For the 'acc' command-line tool unknown functions
+      and variables are looked up using dlsym, to allow using many libc
+      functions and variables.
+
+    - Instructions: blocks ('{' '}') are supported as in C. 'if' and
+      'else' can be used for tests. The 'while' and 'for' C constructs
+      are supported for loops. 'break' can be used to exit
+      loops. 'return' is used for the return value of a function.
+
+      - switch / case is not supported.
+      - goto and labels are not supported.
+      - continue is not supported.
+
+    - Identifiers are parsed the same way as C. Local variables are
+      handled, but there is no local name space (not a problem if
+      different names are used for local and global variables).
+
+    - Numbers can be entered in decimal, hexadecimal ('0x' or '0X'
+      prefix), or octal ('0' prefix).
+
+    - Float and double constants are supported.
+
+    - '#define' is supported without function like arguments. No macro
+      recursion is tolerated. Other preprocessor directives are
+      ignored.
+
+    - C Strings and C character constants are supported. All ANSI C
+      character escapes are supported.
+
+    - Both C comments ( /* */ ) and C++ comments ( // ... end-of-line ) are
+      supported.
+
+    - Some syntax errors are reported, others may cause a crash.
+
+    - Memory: the code, data, and symbol sizes are limited to 100KB
+      (it can be changed in the source code).
+
diff --git a/libacc/LICENSE b/libacc/LICENSE
new file mode 100644
index 0000000..aea41e0
--- /dev/null
+++ b/libacc/LICENSE
@@ -0,0 +1,21 @@
+ Obfuscated Tiny C Compiler
+
+ Copyright (C) 2001-2003 Fabrice Bellard
+
+ This software is provided 'as-is', without any express or implied
+ warranty.  In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product and its documentation
+ *is* required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+
diff --git a/libacc/MODULE_LICENSE_BSD_LIKE b/libacc/MODULE_LICENSE_BSD_LIKE
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libacc/MODULE_LICENSE_BSD_LIKE
diff --git a/libacc/acc.cpp b/libacc/acc.cpp
new file mode 100644
index 0000000..808752e
--- /dev/null
+++ b/libacc/acc.cpp
@@ -0,0 +1,6241 @@
+/*
+ * Android "Almost" C Compiler.
+ * This is a compiler for a small subset of the C language, intended for use
+ * in scripting environments where speed and memory footprint are important.
+ *
+ * This code is based upon the "unobfuscated" version of the
+ * Obfuscated Tiny C compiler, see the file LICENSE for details.
+ *
+ */
+
+#define LOG_TAG "acc"
+#include <cutils/log.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <cutils/hashmap.h>
+
+#if defined(__i386__)
+#include <sys/mman.h>
+#endif
+
+
+#if defined(__arm__)
+#define DEFAULT_ARM_CODEGEN
+#define PROVIDE_ARM_CODEGEN
+#elif defined(__i386__)
+#define DEFAULT_X86_CODEGEN
+#define PROVIDE_X86_CODEGEN
+#elif defined(__x86_64__)
+#define DEFAULT_X64_CODEGEN
+#define PROVIDE_X64_CODEGEN
+#endif
+
+#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
+#define ARM_USE_VFP
+#endif
+
+#include <acc/acc.h>
+
+#define LOG_API(...) do {} while(0)
+// #define LOG_API(...) fprintf (stderr, __VA_ARGS__)
+
+#define LOG_STACK(...) do {} while(0)
+// #define LOG_STACK(...) fprintf (stderr, __VA_ARGS__)
+
+// #define PROVIDE_TRACE_CODEGEN
+
+// Uncomment to disable ARM peephole optimizations
+// #define DISABLE_ARM_PEEPHOLE
+
+// Uncomment to save input to a text file in DEBUG_DUMP_PATTERN
+// #define DEBUG_SAVE_INPUT_TO_FILE
+
+#ifdef DEBUG_SAVE_INPUT_TO_FILE
+#ifdef ARM_USE_VFP
+#define DEBUG_DUMP_PATTERN "/data/misc/acc_dump/%d.c"
+#else
+#define DEBUG_DUMP_PATTERN "/tmp/acc_dump/%d.c"
+#endif
+#endif
+
+#define assert(b) assertImpl(b, __LINE__)
+
+namespace acc {
+
+// Subset of STL vector.
+template<class E> class Vector {
+    public:
+    Vector() {
+        mpBase = 0;
+        mUsed = 0;
+        mSize = 0;
+    }
+
+    ~Vector() {
+        if (mpBase) {
+            for(size_t i = 0; i < mUsed; i++)  {
+                mpBase[mUsed].~E();
+            }
+            free(mpBase);
+        }
+    }
+
+    inline E& operator[](size_t i) {
+        return mpBase[i];
+    }
+
+    inline E& front() {
+        return mpBase[0];
+    }
+
+    inline E& back() {
+        return mpBase[mUsed - 1];
+    }
+
+    void pop_back() {
+        mUsed -= 1;
+        mpBase[mUsed].~E();
+    }
+
+    void push_back(const E& item) {
+        * ensure(1) = item;
+    }
+
+    size_t size() {
+        return mUsed;
+    }
+
+private:
+    E* ensure(int n) {
+        size_t newUsed = mUsed + n;
+        if (newUsed > mSize) {
+            size_t newSize = mSize * 2 + 10;
+            if (newSize < newUsed) {
+                newSize = newUsed;
+            }
+            mpBase = (E*) realloc(mpBase, sizeof(E) * newSize);
+            mSize = newSize;
+        }
+        E* result = mpBase + mUsed;
+        mUsed = newUsed;
+        return result;
+    }
+
+    E* mpBase;
+    size_t mUsed;
+    size_t mSize;
+};
+
+class ErrorSink {
+public:
+    void error(const char *fmt, ...) {
+        va_list ap;
+        va_start(ap, fmt);
+        verror(fmt, ap);
+        va_end(ap);
+    }
+
+    virtual ~ErrorSink() {}
+    virtual void verror(const char* fmt, va_list ap) = 0;
+};
+
+class Compiler : public ErrorSink {
+    typedef int tokenid_t;
+    enum TypeTag {
+        TY_INT,       // 0
+        TY_CHAR,      // 1
+        TY_SHORT,     // 2
+        TY_VOID,      // 3
+        TY_FLOAT,     // 4
+        TY_DOUBLE,    // 5
+        TY_POINTER,   // 6
+        TY_ARRAY,     // 7
+        TY_STRUCT,    // 8
+        TY_FUNC,      // 9
+        TY_PARAM      // 10
+    };
+
+    struct Type {
+        TypeTag tag;
+        tokenid_t id; // For function arguments, global vars, local vars, struct elements
+        tokenid_t structTag; // For structs the name of the struct
+        int length; // length of array, offset of struct element. -1 means struct is forward defined
+        int alignment; // for structs only
+        Type* pHead; // For a struct this is the prototype struct.
+        Type* pTail;
+    };
+
+    enum ExpressionType {
+        ET_RVALUE,
+        ET_LVALUE
+    };
+
+    struct ExpressionValue {
+        ExpressionValue() {
+            et = ET_RVALUE;
+            pType = NULL;
+        }
+        ExpressionType et;
+        Type* pType;
+    };
+
+    class ICodeBuf {
+    public:
+        virtual ~ICodeBuf() {}
+        virtual void init(int size) = 0;
+        virtual void setErrorSink(ErrorSink* pErrorSink) = 0;
+        virtual void o4(int n) = 0;
+        virtual void ob(int n) = 0;
+        virtual void* getBase() = 0;
+        virtual intptr_t getSize() = 0;
+        virtual intptr_t getPC() = 0;
+        // Call this before trying to modify code in the buffer.
+        virtual void flush() = 0;
+    };
+
+    class CodeBuf : public ICodeBuf {
+        char* ind; // Output code pointer
+        char* pProgramBase;
+        ErrorSink* mErrorSink;
+        int mSize;
+        bool mOverflowed;
+
+        void release() {
+            if (pProgramBase != 0) {
+                free(pProgramBase);
+                pProgramBase = 0;
+            }
+        }
+
+        bool check(int n) {
+            int newSize = ind - pProgramBase + n;
+            bool overflow = newSize > mSize;
+            if (overflow && !mOverflowed) {
+                mOverflowed = true;
+                if (mErrorSink) {
+                    mErrorSink->error("Code too large: %d bytes", newSize);
+                }
+            }
+            return overflow;
+        }
+
+    public:
+        CodeBuf() {
+            pProgramBase = 0;
+            ind = 0;
+            mErrorSink = 0;
+            mSize = 0;
+            mOverflowed = false;
+        }
+
+        virtual ~CodeBuf() {
+            release();
+        }
+
+        virtual void init(int size) {
+            release();
+            mSize = size;
+            pProgramBase = (char*) calloc(1, size);
+            ind = pProgramBase;
+        }
+
+        virtual void setErrorSink(ErrorSink* pErrorSink) {
+            mErrorSink = pErrorSink;
+        }
+
+        virtual void o4(int n) {
+            if(check(4)) {
+                return;
+            }
+            * (int*) ind = n;
+            ind += 4;
+        }
+
+        /*
+         * Output a byte. Handles all values, 0..ff.
+         */
+        virtual void ob(int n) {
+            if(check(1)) {
+                return;
+            }
+            *ind++ = n;
+        }
+
+        virtual void* getBase() {
+            return (void*) pProgramBase;
+        }
+
+        virtual intptr_t getSize() {
+            return ind - pProgramBase;
+        }
+
+        virtual intptr_t getPC() {
+            return (intptr_t) ind;
+        }
+
+        virtual void flush() {}
+    };
+
+    /**
+     * A code generator creates an in-memory program, generating the code on
+     * the fly. There is one code generator implementation for each supported
+     * architecture.
+     *
+     * The code generator implements the following abstract machine:
+     * R0 - the accumulator.
+     * FP - a frame pointer for accessing function arguments and local
+     *      variables.
+     * SP - a stack pointer for storing intermediate results while evaluating
+     *      expressions. The stack pointer grows downwards.
+     *
+     * The function calling convention is that all arguments are placed on the
+     * stack such that the first argument has the lowest address.
+     * After the call, the result is in R0. The caller is responsible for
+     * removing the arguments from the stack.
+     * The R0 register is not saved across function calls. The
+     * FP and SP registers are saved.
+     */
+
+    class CodeGenerator {
+    public:
+        CodeGenerator() {
+            mErrorSink = 0;
+            pCodeBuf = 0;
+            pushType();
+        }
+        virtual ~CodeGenerator() {}
+
+        virtual void init(ICodeBuf* pCodeBuf) {
+            this->pCodeBuf = pCodeBuf;
+            pCodeBuf->setErrorSink(mErrorSink);
+        }
+
+        virtual void setErrorSink(ErrorSink* pErrorSink) {
+            mErrorSink = pErrorSink;
+            if (pCodeBuf) {
+                pCodeBuf->setErrorSink(mErrorSink);
+            }
+        }
+
+        /* Give the code generator some utility types so it can
+         * use its own types as needed for the results of some
+         * operations like gcmp.
+         */
+
+        void setTypes(Type* pInt) {
+            mkpInt = pInt;
+        }
+
+        /* Emit a function prolog.
+         * pDecl is the function declaration, which gives the arguments.
+         * Save the old value of the FP.
+         * Set the new value of the FP.
+         * Convert from the native platform calling convention to
+         * our stack-based calling convention. This may require
+         * pushing arguments from registers to the stack.
+         * Allocate "N" bytes of stack space. N isn't known yet, so
+         * just emit the instructions for adjusting the stack, and return
+         * the address to patch up. The patching will be done in
+         * functionExit().
+         * returns address to patch with local variable size.
+        */
+        virtual int functionEntry(Type* pDecl) = 0;
+
+        /* Emit a function epilog.
+         * Restore the old SP and FP register values.
+         * Return to the calling function.
+         * argCount - the number of arguments to the function.
+         * localVariableAddress - returned from functionEntry()
+         * localVariableSize - the size in bytes of the local variables.
+         */
+        virtual void functionExit(Type* pDecl, int localVariableAddress,
+                                  int localVariableSize) = 0;
+
+        /* load immediate value to R0 */
+        virtual void li(int i) = 0;
+
+        /* Load floating point value from global address. */
+        virtual void loadFloat(int address, Type* pType) = 0;
+
+        /* Add the struct offset in bytes to R0, change the type to pType */
+        virtual void addStructOffsetR0(int offset, Type* pType) = 0;
+
+        /* Jump to a target, and return the address of the word that
+         * holds the target data, in case it needs to be fixed up later.
+         */
+        virtual int gjmp(int t) = 0;
+
+        /* Test R0 and jump to a target if the test succeeds.
+         * l = 0: je, l == 1: jne
+         * Return the address of the word that holds the targed data, in
+         * case it needs to be fixed up later.
+         */
+        virtual int gtst(bool l, int t) = 0;
+
+        /* Compare TOS against R0, and store the boolean result in R0.
+         * Pops TOS.
+         * op specifies the comparison.
+         */
+        virtual void gcmp(int op) = 0;
+
+        /* Perform the arithmetic op specified by op. TOS is the
+         * left argument, R0 is the right argument.
+         * Pops TOS.
+         */
+        virtual void genOp(int op) = 0;
+
+        /* Compare 0 against R0, and store the boolean result in R0.
+         * op specifies the comparison.
+         */
+        virtual void gUnaryCmp(int op) = 0;
+
+        /* Perform the arithmetic op specified by op. 0 is the
+         * left argument, R0 is the right argument.
+         */
+        virtual void genUnaryOp(int op) = 0;
+
+        /* Push R0 onto the stack. (Also known as "dup" for duplicate.)
+         */
+        virtual void pushR0() = 0;
+
+        /* Turn R0, TOS into R0 TOS R0 */
+
+        virtual void over() = 0;
+
+        /* Pop R0 from the stack. (Also known as "drop")
+         */
+        virtual void popR0() = 0;
+
+        /* Store R0 to the address stored in TOS.
+         * The TOS is popped.
+         */
+        virtual void storeR0ToTOS() = 0;
+
+        /* Load R0 from the address stored in R0.
+         */
+        virtual void loadR0FromR0() = 0;
+
+        /* Load the absolute address of a variable to R0.
+         * If ea <= LOCAL, then this is a local variable, or an
+         * argument, addressed relative to FP.
+         * else it is an absolute global address.
+         *
+         * et is ET_RVALUE for things like string constants, ET_LVALUE for
+         * variables.
+         */
+        virtual void leaR0(int ea, Type* pPointerType, ExpressionType et) = 0;
+
+        /* Load the pc-relative address of a forward-referenced variable to R0.
+         * Return the address of the 4-byte constant so that it can be filled
+         * in later.
+         */
+        virtual int leaForward(int ea, Type* pPointerType) = 0;
+
+        /**
+         * Convert R0 to the given type.
+         */
+
+        void convertR0(Type* pType) {
+            convertR0Imp(pType, false);
+        }
+
+        void castR0(Type* pType) {
+            convertR0Imp(pType, true);
+        }
+
+        virtual void convertR0Imp(Type* pType, bool isCast) = 0;
+
+        /* Emit code to adjust the stack for a function call. Return the
+         * label for the address of the instruction that adjusts the
+         * stack size. This will be passed as argument "a" to
+         * endFunctionCallArguments.
+         */
+        virtual int beginFunctionCallArguments() = 0;
+
+        /* Emit code to store R0 to the stack at byte offset l.
+         * Returns stack size of object (typically 4 or 8 bytes)
+         */
+        virtual size_t storeR0ToArg(int l, Type* pArgType) = 0;
+
+        /* Patch the function call preamble.
+         * a is the address returned from beginFunctionCallArguments
+         * l is the number of bytes the arguments took on the stack.
+         * Typically you would also emit code to convert the argument
+         * list into whatever the native function calling convention is.
+         * On ARM for example you would pop the first 5 arguments into
+         * R0..R4
+         */
+        virtual void endFunctionCallArguments(Type* pDecl, int a, int l) = 0;
+
+        /* Emit a call to an unknown function. The argument "symbol" needs to
+         * be stored in the location where the address should go. It forms
+         * a chain. The address will be patched later.
+         * Return the address of the word that has to be patched.
+         */
+        virtual int callForward(int symbol, Type* pFunc) = 0;
+
+        /* Call a function pointer. L is the number of bytes the arguments
+         * take on the stack. The address of the function is stored at
+         * location SP + l.
+         */
+        virtual void callIndirect(int l, Type* pFunc) = 0;
+
+        /* Adjust SP after returning from a function call. l is the
+         * number of bytes of arguments stored on the stack. isIndirect
+         * is true if this was an indirect call. (In which case the
+         * address of the function is stored at location SP + l.)
+         */
+        virtual void adjustStackAfterCall(Type* pDecl, int l, bool isIndirect) = 0;
+
+        /* Generate a symbol at the current PC. t is the head of a
+         * linked list of addresses to patch.
+         */
+        virtual void gsym(int t) = 0;
+
+        /* Resolve a forward reference function at the current PC.
+         * t is the head of a
+         * linked list of addresses to patch.
+         * (Like gsym, but using absolute address, not PC relative address.)
+         */
+        virtual void resolveForward(int t) = 0;
+
+        /*
+         * Do any cleanup work required at the end of a compile.
+         * For example, an instruction cache might need to be
+         * invalidated.
+         * Return non-zero if there is an error.
+         */
+        virtual int finishCompile() = 0;
+
+        /**
+         * Adjust relative branches by this amount.
+         */
+        virtual int jumpOffset() = 0;
+
+        /**
+         * Memory alignment (in bytes) for this type of data
+         */
+        virtual size_t alignmentOf(Type* type) = 0;
+
+        /**
+         * Array element alignment (in bytes) for this type of data.
+         */
+        virtual size_t sizeOf(Type* type) = 0;
+
+        virtual Type* getR0Type() {
+            return mExpressionStack.back().pType;
+        }
+
+        virtual ExpressionType getR0ExpressionType() {
+            return mExpressionStack.back().et;
+        }
+
+        virtual void setR0ExpressionType(ExpressionType et) {
+            mExpressionStack.back().et = et;
+        }
+
+        virtual size_t getExpressionStackDepth() {
+            return mExpressionStack.size();
+        }
+
+        virtual void forceR0RVal() {
+            if (getR0ExpressionType() == ET_LVALUE) {
+                loadR0FromR0();
+            }
+        }
+
+    protected:
+        /*
+         * Output a byte. Handles all values, 0..ff.
+         */
+        void ob(int n) {
+            pCodeBuf->ob(n);
+        }
+
+        void o4(int data) {
+            pCodeBuf->o4(data);
+        }
+
+        intptr_t getBase() {
+            return (intptr_t) pCodeBuf->getBase();
+        }
+
+        intptr_t getPC() {
+            return pCodeBuf->getPC();
+        }
+
+        intptr_t getSize() {
+            return pCodeBuf->getSize();
+        }
+
+        void flush() {
+            pCodeBuf->flush();
+        }
+
+        void error(const char* fmt,...) {
+            va_list ap;
+            va_start(ap, fmt);
+            mErrorSink->verror(fmt, ap);
+            va_end(ap);
+        }
+
+        void assertImpl(bool test, int line) {
+            if (!test) {
+                error("code generator assertion failed at line %s:%d.", __FILE__, line);
+                LOGD("code generator assertion failed at line %s:%d.", __FILE__, line);
+                * (char*) 0 = 0;
+            }
+        }
+
+        void setR0Type(Type* pType) {
+            assert(pType != NULL);
+            mExpressionStack.back().pType = pType;
+            mExpressionStack.back().et = ET_RVALUE;
+        }
+
+        void setR0Type(Type* pType, ExpressionType et) {
+            assert(pType != NULL);
+            mExpressionStack.back().pType = pType;
+            mExpressionStack.back().et = et;
+        }
+
+        Type* getTOSType() {
+            return mExpressionStack[mExpressionStack.size()-2].pType;
+        }
+
+        void pushType() {
+            if (mExpressionStack.size()) {
+                mExpressionStack.push_back(mExpressionStack.back());
+            } else {
+                mExpressionStack.push_back(ExpressionValue());
+            }
+
+        }
+
+        void overType() {
+            size_t size = mExpressionStack.size();
+            if (size >= 2) {
+                mExpressionStack.push_back(mExpressionStack.back());
+                mExpressionStack[size-1] = mExpressionStack[size-2];
+                mExpressionStack[size-2] = mExpressionStack[size];
+            }
+        }
+
+        void popType() {
+            mExpressionStack.pop_back();
+        }
+
+        bool bitsSame(Type* pA, Type* pB) {
+            return collapseType(pA->tag) == collapseType(pB->tag);
+        }
+
+        TypeTag collapseType(TypeTag tag) {
+            static const TypeTag collapsedTag[] = {
+                    TY_INT,
+                    TY_INT,
+                    TY_INT,
+                    TY_VOID,
+                    TY_FLOAT,
+                    TY_DOUBLE,
+                    TY_INT,
+                    TY_INT,
+                    TY_VOID,
+                    TY_VOID,
+                    TY_VOID
+                };
+            return collapsedTag[tag];
+        }
+
+        TypeTag collapseTypeR0() {
+            return collapseType(getR0Type()->tag);
+        }
+
+        static bool isFloatType(Type* pType) {
+            return isFloatTag(pType->tag);
+        }
+
+        static bool isFloatTag(TypeTag tag) {
+            return tag == TY_FLOAT || tag == TY_DOUBLE;
+        }
+
+        static bool isPointerType(Type* pType) {
+            return isPointerTag(pType->tag);
+        }
+
+        static bool isPointerTag(TypeTag tag) {
+            return tag == TY_POINTER || tag == TY_ARRAY;
+        }
+
+        Type* getPointerArithmeticResultType(Type* a, Type* b) {
+            TypeTag aTag = a->tag;
+            TypeTag bTag = b->tag;
+            if (aTag == TY_POINTER) {
+                return a;
+            }
+            if (bTag == TY_POINTER) {
+                return b;
+            }
+            if (aTag == TY_ARRAY) {
+                return a->pTail;
+            }
+            if (bTag == TY_ARRAY) {
+                return b->pTail;
+            }
+            return NULL;
+        }
+        Type* mkpInt;
+
+    private:
+        Vector<ExpressionValue> mExpressionStack;
+        ICodeBuf* pCodeBuf;
+        ErrorSink* mErrorSink;
+    };
+
+#ifdef PROVIDE_ARM_CODEGEN
+
+    static size_t rotateRight(size_t n, size_t rotate) {
+        return (n >> rotate) | (n << (32 - rotate));
+    }
+
+    static size_t rotateLeft(size_t n, size_t rotate) {
+        return (n << rotate) | (n >> (32 - rotate));
+    }
+
+    static bool encode12BitImmediate(size_t immediate, size_t* pResult) {
+        for(size_t i = 0; i < 16; i++) {
+            size_t rotate = i * 2;
+            size_t mask = rotateRight(0xff, rotate);
+            if ((immediate | mask) == mask) {
+                size_t bits8 = rotateLeft(immediate, rotate);
+                // assert(bits8 <= 0xff);
+                *pResult = (i << 8) | bits8;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    static size_t decode12BitImmediate(size_t immediate) {
+        size_t data = immediate & 0xff;
+        size_t rotate = 2 * ((immediate >> 8) & 0xf);
+        return rotateRight(data, rotate);
+    }
+
+    static bool isPowerOfTwo(size_t n) {
+        return (n != 0) & ((n & (n-1)) == 0);
+    }
+
+    static size_t log2(size_t n) {
+        int result = 0;
+        while (n >>= 1) {
+            result++;
+        }
+        return result;
+    }
+
+    class ARMCodeBuf : public ICodeBuf {
+        ICodeBuf* mpBase;
+        ErrorSink* mErrorSink;
+
+        class CircularQueue {
+            static const int SIZE = 16; // Must be power of 2
+            static const int MASK = SIZE-1;
+            unsigned int mBuf[SIZE];
+            int mHead;
+            int mCount;
+
+        public:
+            CircularQueue() {
+                mHead = 0;
+                mCount = 0;
+            }
+
+            void pushBack(unsigned int data) {
+                mBuf[(mHead + mCount) & MASK] = data;
+                mCount += 1;
+            }
+
+            unsigned int popFront() {
+                unsigned int result = mBuf[mHead];
+                mHead = (mHead + 1) & MASK;
+                mCount -= 1;
+                return result;
+            }
+
+            void popBack(int n) {
+                mCount -= n;
+            }
+
+            inline int count() {
+                return mCount;
+            }
+
+            bool empty() {
+                return mCount == 0;
+            }
+
+            bool full() {
+                return mCount == SIZE;
+            }
+
+            // The valid indexes are 1 - count() to 0
+            unsigned int operator[](int i) {
+                return mBuf[(mHead + mCount + i) & MASK];
+            }
+        };
+
+        CircularQueue mQ;
+
+        void error(const char* fmt,...) {
+            va_list ap;
+            va_start(ap, fmt);
+            mErrorSink->verror(fmt, ap);
+            va_end(ap);
+        }
+
+        void flush() {
+            while (!mQ.empty()) {
+                mpBase->o4(mQ.popFront());
+            }
+            mpBase->flush();
+        }
+
+    public:
+        ARMCodeBuf(ICodeBuf* pBase) {
+            mpBase = pBase;
+        }
+
+        virtual ~ARMCodeBuf() {
+            delete mpBase;
+        }
+
+        void init(int size) {
+            mpBase->init(size);
+        }
+
+        void setErrorSink(ErrorSink* pErrorSink) {
+            mErrorSink = pErrorSink;
+            mpBase->setErrorSink(pErrorSink);
+        }
+
+        void o4(int n) {
+            if (mQ.full()) {
+                mpBase->o4(mQ.popFront());
+            }
+            mQ.pushBack(n);
+
+#ifndef DISABLE_ARM_PEEPHOLE
+            // Peephole check
+            bool didPeep;
+            do {
+                static const unsigned int opMask = 0x01e00000;
+                static const unsigned int immediateMask = 0x00000fff;
+                static const unsigned int BMask = 0x00400000;
+                didPeep = false;
+                if (mQ.count() >= 4) {
+
+                    // Operand by a small constant
+                    // push;mov #imm;pop;op ==> op #imm
+
+                    if (mQ[-4] == 0xe92d0001  && // stmfd    r13!, {r0}
+                        (mQ[-3] & ~immediateMask) == 0xe3a00000  && // mov    r0, #X
+                        mQ[-2] == 0xe8bd0002  && // ldmea    r13!, {r1}
+                        (mQ[-1] & ~opMask) == (0xe0810000 & ~opMask)) {  // OP    r0, r1, r0
+                        unsigned int movConst = mQ[-3];
+                        unsigned int op = mQ[-1];
+                        unsigned int combined = 0xe2000000 | (op & opMask) | (movConst & immediateMask);
+                        // fprintf(stderr, "op %x movConst %x combined %x\n", op, movConst, combined);
+                        if (! (combined == 0xe2800000 || combined == 0xe2400000)) { // add/sub #0
+                            mQ.popBack(4);
+                            mQ.pushBack(combined);
+                            didPeep = true;
+                        } else {
+                            mQ.popBack(4);
+                            didPeep = true;
+                        }
+                    }
+                }
+
+                // Load local variable
+                // sub r0,r11,#imm;ldr/ldrb r0,[r0]  ==> ldr/ldrb r0, [r11,#-imm]
+                if (mQ.count() >= 2) {
+                    if ((mQ[-2] & ~immediateMask) == 0xe24b0000) { // sub r0,r11,#imm
+                        const unsigned int encodedImmediate = mQ[-2] & immediateMask;
+                        const unsigned int ld = mQ[-1];
+                        if ((ld & ~BMask) == 0xe5900000) { // ldr{b} r0, [r0]
+                            unsigned int combined = encodedImmediate | (0xE51B0000 | (ld & BMask)); // ldr r0, [r11, #-0]
+                            mQ.popBack(2);
+                            mQ.pushBack(combined);
+                            didPeep = true;
+                        } else if (ld == 0xedd07a00) {  // ldcl    p10, c7, [r0, #0x000]
+                            unsigned int decodedImmediate = decode12BitImmediate(encodedImmediate);
+                            if (decodedImmediate <= 1020 && ((decodedImmediate & 3) == 0)) {
+                                unsigned int combined = (decodedImmediate >> 2) | 0xed5b7a00; // ldcl    p10, c7, [r11, #-0]
+                                mQ.popBack(2);
+                                mQ.pushBack(combined);
+                                didPeep = true;
+                            }
+                        }
+                    }
+                }
+
+                // Constant array lookup
+
+                if (mQ.count() >= 6 &&
+                    mQ[-6] == 0xe92d0001 && // stmfd r13!, {r0}
+                    (mQ[-5] & ~immediateMask)== 0xe3a00000 && // mov r0, #0x00000001
+                    mQ[-4] == 0xe8bd0002 && // ldmea r13!, {r1}
+                    (mQ[-3] & ~immediateMask)== 0xe3a02000 && // mov r2, #0x00000004
+                    mQ[-2] == 0xe0000092 && // mul r0, r2, r0
+                    mQ[-1] == 0xe0810000) { // add r0, r1, r0
+                    unsigned int mov1 = mQ[-5];
+                    unsigned int mov2 = mQ[-3];
+                    unsigned int const1 = decode12BitImmediate(mov1);
+                    unsigned int const2 = decode12BitImmediate(mov2);
+                    unsigned int comboConst = const1 * const2;
+                    size_t immediate = 0;
+                    if (encode12BitImmediate(comboConst, &immediate)) {
+                        mQ.popBack(6);
+                        unsigned int add = immediate | 0xE2800000; // add r0, r0, #n
+                        if (comboConst) {
+                            mQ.pushBack(add);
+                        }
+                        didPeep = true;
+                    }
+                }
+
+                // Pointer arithmetic with a stride that is a power of two
+
+                if (mQ.count() >= 3 &&
+                    (mQ[-3] & ~ immediateMask) == 0xe3a02000 &&  // mov    r2, #stride
+                     mQ[-2] == 0xe0000092 && // mul    r0, r2, r0
+                     mQ[-1] == 0xe0810000) {  // add r0, r1, r0
+                    int stride = decode12BitImmediate(mQ[-3]);
+                    if (isPowerOfTwo(stride)) {
+                        mQ.popBack(3);
+                        unsigned int add = 0xe0810000 | (log2(stride) << 7); // add r0, r1, r0, LSL #log2(stride)
+                        mQ.pushBack(add);
+                        didPeep = true;
+                    }
+                }
+
+            } while (didPeep);
+#endif
+        }
+
+        void ob(int n) {
+            error("ob() not supported.");
+        }
+
+        void* getBase() {
+            flush();
+            return mpBase->getBase();
+        }
+
+        intptr_t getSize() {
+            flush();
+            return mpBase->getSize();
+        }
+
+        intptr_t getPC() {
+            flush();
+            return mpBase->getPC();
+        }
+    };
+
+    class ARMCodeGenerator : public CodeGenerator {
+    public:
+        ARMCodeGenerator() {
+#ifdef ARM_USE_VFP
+            // LOGD("Using ARM VFP hardware floating point.");
+#else
+            // LOGD("Using ARM soft floating point.");
+#endif
+        }
+
+        virtual ~ARMCodeGenerator() {}
+
+        /* returns address to patch with local variable size
+        */
+        virtual int functionEntry(Type* pDecl) {
+            mStackUse = 0;
+            // sp -> arg4 arg5 ...
+            // Push our register-based arguments back on the stack
+            int regArgCount = calcRegArgCount(pDecl);
+            if (regArgCount > 0) {
+                mStackUse += regArgCount * 4;
+                o4(0xE92D0000 | ((1 << regArgCount) - 1)); // stmfd    sp!, {}
+            }
+            // sp -> arg0 arg1 ...
+            o4(0xE92D4800); // stmfd sp!, {fp, lr}
+            mStackUse += 2 * 4;
+            // sp, fp -> oldfp, retadr, arg0 arg1 ....
+            o4(0xE1A0B00D); // mov    fp, sp
+            LOG_STACK("functionEntry: %d\n", mStackUse);
+            int pc = getPC();
+            o4(0xE24DD000); // sub    sp, sp, # <local variables>
+            // We don't know how many local variables we are going to use,
+            // but we will round the allocation up to a multiple of
+            // STACK_ALIGNMENT, so it won't affect the stack alignment.
+            return pc;
+        }
+
+        virtual void functionExit(Type* pDecl, int localVariableAddress, int localVariableSize) {
+            // Round local variable size up to a multiple of stack alignment
+            localVariableSize = ((localVariableSize + STACK_ALIGNMENT - 1) /
+                STACK_ALIGNMENT) * STACK_ALIGNMENT;
+            // Patch local variable allocation code:
+            if (localVariableSize < 0 || localVariableSize > 255) {
+                error("localVariables out of range: %d", localVariableSize);
+            }
+            *(char*) (localVariableAddress) = localVariableSize;
+
+#ifdef ARM_USE_VFP
+            {
+                Type* pReturnType = pDecl->pHead;
+                switch(pReturnType->tag) {
+                case TY_FLOAT:
+                    o4(0xEE170A90); // fmrs    r0, s15
+                    break;
+                case TY_DOUBLE:
+                    o4(0xEC510B17); // fmrrd r0, r1, d7
+                    break;
+                default:
+                    break;
+                }
+            }
+#endif
+
+            // sp -> locals .... fp -> oldfp, retadr, arg0, arg1, ...
+            o4(0xE1A0E00B); // mov lr, fp
+            o4(0xE59BB000); // ldr fp, [fp]
+            o4(0xE28ED004); // add sp, lr, #4
+            // sp -> retadr, arg0, ...
+            o4(0xE8BD4000); // ldmfd    sp!, {lr}
+            // sp -> arg0 ....
+
+            // We store the PC into the lr so we can adjust the sp before
+            // returning. We need to pull off the registers we pushed
+            // earlier. We don't need to actually store them anywhere,
+            // just adjust the stack.
+            int regArgCount = calcRegArgCount(pDecl);
+            if (regArgCount) {
+                o4(0xE28DD000 | (regArgCount << 2)); // add sp, sp, #argCount << 2
+            }
+            o4(0xE12FFF1E); // bx lr
+        }
+
+        /* load immediate value */
+        virtual void li(int t) {
+            liReg(t, 0);
+            setR0Type(mkpInt);
+        }
+
+        virtual void loadFloat(int address, Type* pType) {
+            setR0Type(pType);
+            // Global, absolute address
+            o4(0xE59F0000); //        ldr r0, .L1
+            o4(0xEA000000); //        b .L99
+            o4(address);         // .L1:   .word ea
+                                 // .L99:
+
+            switch (pType->tag) {
+            case TY_FLOAT:
+#ifdef ARM_USE_VFP
+                o4(0xEDD07A00);      // flds    s15, [r0]
+#else
+                o4(0xE5900000);      // ldr r0, [r0]
+#endif
+                break;
+            case TY_DOUBLE:
+#ifdef ARM_USE_VFP
+                o4(0xED907B00);      // fldd    d7, [r0]
+#else
+                o4(0xE1C000D0);      // ldrd r0, [r0]
+#endif
+                break;
+            default:
+                assert(false);
+                break;
+            }
+        }
+
+
+        virtual void addStructOffsetR0(int offset, Type* pType) {
+            if (offset) {
+                size_t immediate = 0;
+                if (encode12BitImmediate(offset, &immediate)) {
+                    o4(0xE2800000 | immediate); // add    r0, r0, #offset
+                } else {
+                    error("structure offset out of range: %d", offset);
+                }
+            }
+            setR0Type(pType, ET_LVALUE);
+        }
+
+        virtual int gjmp(int t) {
+            int pc = getPC();
+            o4(0xEA000000 | encodeAddress(t)); // b .L33
+            return pc;
+        }
+
+        /* l = 0: je, l == 1: jne */
+        virtual int gtst(bool l, int t) {
+            Type* pR0Type = getR0Type();
+            TypeTag tagR0 = pR0Type->tag;
+            switch(tagR0) {
+                case TY_FLOAT:
+#ifdef ARM_USE_VFP
+                    o4(0xEEF57A40); // fcmpzs    s15
+                    o4(0xEEF1FA10); // fmstat
+#else
+                    callRuntime((void*) runtime_is_non_zero_f);
+                    o4(0xE3500000); // cmp r0,#0
+#endif
+                    break;
+                case TY_DOUBLE:
+#ifdef ARM_USE_VFP
+                    o4(0xEEB57B40); // fcmpzd    d7
+                    o4(0xEEF1FA10); // fmstat
+#else
+                    callRuntime((void*) runtime_is_non_zero_d);
+                    o4(0xE3500000); // cmp r0,#0
+#endif
+                    break;
+                default:
+                    o4(0xE3500000); // cmp r0,#0
+                    break;
+            }
+            int branch = l ? 0x1A000000 : 0x0A000000; // bne : beq
+            int pc = getPC();
+            o4(branch | encodeAddress(t));
+            return pc;
+        }
+
+        virtual void gcmp(int op) {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = collapseType(pR0Type->tag);
+            TypeTag tagTOS = collapseType(pTOSType->tag);
+            if (tagR0 == TY_INT && tagTOS == TY_INT) {
+                setupIntPtrArgs();
+                o4(0xE1510000); // cmp r1, r1
+                switch(op) {
+                case OP_EQUALS:
+                    o4(0x03A00001); // moveq r0,#1
+                    o4(0x13A00000); // movne r0,#0
+                    break;
+                case OP_NOT_EQUALS:
+                    o4(0x03A00000); // moveq r0,#0
+                    o4(0x13A00001); // movne r0,#1
+                    break;
+                case OP_LESS_EQUAL:
+                    o4(0xD3A00001); // movle r0,#1
+                    o4(0xC3A00000); // movgt r0,#0
+                    break;
+                case OP_GREATER:
+                    o4(0xD3A00000); // movle r0,#0
+                    o4(0xC3A00001); // movgt r0,#1
+                    break;
+                case OP_GREATER_EQUAL:
+                    o4(0xA3A00001); // movge r0,#1
+                    o4(0xB3A00000); // movlt r0,#0
+                    break;
+                case OP_LESS:
+                    o4(0xA3A00000); // movge r0,#0
+                    o4(0xB3A00001); // movlt r0,#1
+                    break;
+                default:
+                    error("Unknown comparison op %d", op);
+                    break;
+                }
+            } else if (tagR0 == TY_DOUBLE || tagTOS == TY_DOUBLE) {
+                setupDoubleArgs();
+#ifdef ARM_USE_VFP
+                o4(0xEEB46BC7); //         fcmped    d6, d7
+                   o4(0xEEF1FA10); // fmstat
+                switch(op) {
+                case OP_EQUALS:
+                    o4(0x03A00001); // moveq r0,#1
+                    o4(0x13A00000); // movne r0,#0
+                    break;
+                case OP_NOT_EQUALS:
+                    o4(0x03A00000); // moveq r0,#0
+                    o4(0x13A00001); // movne r0,#1
+                    break;
+                case OP_LESS_EQUAL:
+                    o4(0xD3A00001); // movle r0,#1
+                    o4(0xC3A00000); // movgt r0,#0
+                    break;
+                case OP_GREATER:
+                    o4(0xD3A00000); // movle r0,#0
+                    o4(0xC3A00001); // movgt r0,#1
+                    break;
+                case OP_GREATER_EQUAL:
+                    o4(0xA3A00001); // movge r0,#1
+                    o4(0xB3A00000); // movlt r0,#0
+                    break;
+                case OP_LESS:
+                    o4(0xA3A00000); // movge r0,#0
+                    o4(0xB3A00001); // movlt r0,#1
+                    break;
+                default:
+                    error("Unknown comparison op %d", op);
+                    break;
+                }
+#else
+                switch(op) {
+                    case OP_EQUALS:
+                        callRuntime((void*) runtime_cmp_eq_dd);
+                        break;
+                    case OP_NOT_EQUALS:
+                        callRuntime((void*) runtime_cmp_ne_dd);
+                        break;
+                    case OP_LESS_EQUAL:
+                        callRuntime((void*) runtime_cmp_le_dd);
+                        break;
+                    case OP_GREATER:
+                        callRuntime((void*) runtime_cmp_gt_dd);
+                        break;
+                    case OP_GREATER_EQUAL:
+                        callRuntime((void*) runtime_cmp_ge_dd);
+                        break;
+                    case OP_LESS:
+                        callRuntime((void*) runtime_cmp_lt_dd);
+                        break;
+                    default:
+                        error("Unknown comparison op %d", op);
+                        break;
+                }
+#endif
+            } else {
+                setupFloatArgs();
+#ifdef ARM_USE_VFP
+                o4(0xEEB47AE7); // fcmpes s14, s15
+                   o4(0xEEF1FA10); // fmstat
+                switch(op) {
+                case OP_EQUALS:
+                    o4(0x03A00001); // moveq r0,#1
+                    o4(0x13A00000); // movne r0,#0
+                    break;
+                case OP_NOT_EQUALS:
+                    o4(0x03A00000); // moveq r0,#0
+                    o4(0x13A00001); // movne r0,#1
+                    break;
+                case OP_LESS_EQUAL:
+                    o4(0xD3A00001); // movle r0,#1
+                    o4(0xC3A00000); // movgt r0,#0
+                    break;
+                case OP_GREATER:
+                    o4(0xD3A00000); // movle r0,#0
+                    o4(0xC3A00001); // movgt r0,#1
+                    break;
+                case OP_GREATER_EQUAL:
+                    o4(0xA3A00001); // movge r0,#1
+                    o4(0xB3A00000); // movlt r0,#0
+                    break;
+                case OP_LESS:
+                    o4(0xA3A00000); // movge r0,#0
+                    o4(0xB3A00001); // movlt r0,#1
+                    break;
+                default:
+                    error("Unknown comparison op %d", op);
+                    break;
+                }
+#else
+                switch(op) {
+                    case OP_EQUALS:
+                        callRuntime((void*) runtime_cmp_eq_ff);
+                        break;
+                    case OP_NOT_EQUALS:
+                        callRuntime((void*) runtime_cmp_ne_ff);
+                        break;
+                    case OP_LESS_EQUAL:
+                        callRuntime((void*) runtime_cmp_le_ff);
+                        break;
+                    case OP_GREATER:
+                        callRuntime((void*) runtime_cmp_gt_ff);
+                        break;
+                    case OP_GREATER_EQUAL:
+                        callRuntime((void*) runtime_cmp_ge_ff);
+                        break;
+                    case OP_LESS:
+                        callRuntime((void*) runtime_cmp_lt_ff);
+                        break;
+                    default:
+                        error("Unknown comparison op %d", op);
+                        break;
+                }
+#endif
+            }
+            setR0Type(mkpInt);
+        }
+
+        virtual void genOp(int op) {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = pR0Type->tag;
+            TypeTag tagTOS = pTOSType->tag;
+            bool isFloatR0 = isFloatTag(tagR0);
+            bool isFloatTOS = isFloatTag(tagTOS);
+            if (!isFloatR0 && !isFloatTOS) {
+                setupIntPtrArgs();
+                bool isPtrR0 = isPointerTag(tagR0);
+                bool isPtrTOS = isPointerTag(tagTOS);
+                if (isPtrR0 || isPtrTOS) {
+                    if (isPtrR0 && isPtrTOS) {
+                        if (op != OP_MINUS) {
+                            error("Unsupported pointer-pointer operation %d.", op);
+                        }
+                        if (! typeEqual(pR0Type, pTOSType)) {
+                            error("Incompatible pointer types for subtraction.");
+                        }
+                        o4(0xE0410000); // sub     r0,r1,r0
+                        setR0Type(mkpInt);
+                        int size = sizeOf(pR0Type->pHead);
+                        if (size != 1) {
+                            pushR0();
+                            li(size);
+                            // TODO: Optimize for power-of-two.
+                            genOp(OP_DIV);
+                        }
+                    } else {
+                        if (! (op == OP_PLUS || (op == OP_MINUS && isPtrR0))) {
+                            error("Unsupported pointer-scalar operation %d", op);
+                        }
+                        Type* pPtrType = getPointerArithmeticResultType(
+                                pR0Type, pTOSType);
+                        int size = sizeOf(pPtrType->pHead);
+                        if (size != 1) {
+                            // TODO: Optimize for power-of-two.
+                            liReg(size, 2);
+                            if (isPtrR0) {
+                                o4(0x0E0010192); // mul     r1,r2,r1
+                            } else {
+                                o4(0x0E0000092); // mul     r0,r2,r0
+                            }
+                        }
+                        switch(op) {
+                            case OP_PLUS:
+                            o4(0xE0810000); // add     r0,r1,r0
+                            break;
+                            case OP_MINUS:
+                            o4(0xE0410000); // sub     r0,r1,r0
+                            break;
+                        }
+                        setR0Type(pPtrType);
+                    }
+                } else {
+                    switch(op) {
+                        case OP_MUL:
+                        o4(0x0E0000091); // mul     r0,r1,r0
+                        break;
+                        case OP_DIV:
+                        callRuntime((void*) runtime_DIV);
+                        break;
+                        case OP_MOD:
+                        callRuntime((void*) runtime_MOD);
+                        break;
+                        case OP_PLUS:
+                        o4(0xE0810000); // add     r0,r1,r0
+                        break;
+                        case OP_MINUS:
+                        o4(0xE0410000); // sub     r0,r1,r0
+                        break;
+                        case OP_SHIFT_LEFT:
+                        o4(0xE1A00011); // lsl     r0,r1,r0
+                        break;
+                        case OP_SHIFT_RIGHT:
+                        o4(0xE1A00051); // asr     r0,r1,r0
+                        break;
+                        case OP_BIT_AND:
+                        o4(0xE0010000); // and     r0,r1,r0
+                        break;
+                        case OP_BIT_XOR:
+                        o4(0xE0210000); // eor     r0,r1,r0
+                        break;
+                        case OP_BIT_OR:
+                        o4(0xE1810000); // orr     r0,r1,r0
+                        break;
+                        case OP_BIT_NOT:
+                        o4(0xE1E00000); // mvn     r0, r0
+                        break;
+                        default:
+                        error("Unimplemented op %d\n", op);
+                        break;
+                    }
+                }
+            } else {
+                Type* pResultType = tagR0 > tagTOS ? pR0Type : pTOSType;
+                if (pResultType->tag == TY_DOUBLE) {
+                    setupDoubleArgs();
+
+                    switch(op) {
+                    case OP_MUL:
+#ifdef ARM_USE_VFP
+                        o4(0xEE267B07); // fmuld d7, d6, d7
+#else
+                        callRuntime((void*) runtime_op_mul_dd);
+#endif
+                        break;
+                    case OP_DIV:
+#ifdef ARM_USE_VFP
+                        o4(0xEE867B07); // fdivd d7, d6, d7
+#else
+                        callRuntime((void*) runtime_op_div_dd);
+#endif
+                        break;
+                    case OP_PLUS:
+#ifdef ARM_USE_VFP
+                        o4(0xEE367B07); // faddd d7, d6, d7
+#else
+                        callRuntime((void*) runtime_op_add_dd);
+#endif
+                        break;
+                    case OP_MINUS:
+#ifdef ARM_USE_VFP
+                        o4(0xEE367B47); // fsubd d7, d6, d7
+#else
+                        callRuntime((void*) runtime_op_sub_dd);
+#endif
+                        break;
+                    default:
+                        error("Unsupported binary floating operation %d\n", op);
+                        break;
+                    }
+                } else {
+                    setupFloatArgs();
+                    switch(op) {
+                    case OP_MUL:
+#ifdef ARM_USE_VFP
+                        o4(0xEE677A27); // fmuls s15, s14, s15
+#else
+                        callRuntime((void*) runtime_op_mul_ff);
+#endif
+                        break;
+                    case OP_DIV:
+#ifdef ARM_USE_VFP
+                        o4(0xEEC77A27); // fdivs s15, s14, s15
+#else
+                        callRuntime((void*) runtime_op_div_ff);
+#endif
+                        break;
+                    case OP_PLUS:
+#ifdef ARM_USE_VFP
+                        o4(0xEE777A27); // fadds s15, s14, s15
+#else
+                        callRuntime((void*) runtime_op_add_ff);
+#endif
+                        break;
+                    case OP_MINUS:
+#ifdef ARM_USE_VFP
+                        o4(0xEE777A67); // fsubs s15, s14, s15
+#else
+                        callRuntime((void*) runtime_op_sub_ff);
+#endif
+                        break;
+                    default:
+                        error("Unsupported binary floating operation %d\n", op);
+                        break;
+                    }
+                }
+                setR0Type(pResultType);
+            }
+        }
+
+        virtual void gUnaryCmp(int op) {
+            if (op != OP_LOGICAL_NOT) {
+                error("Unknown unary cmp %d", op);
+            } else {
+                Type* pR0Type = getR0Type();
+                TypeTag tag = collapseType(pR0Type->tag);
+                switch(tag) {
+                    case TY_INT:
+                        o4(0xE3A01000); // mov    r1, #0
+                        o4(0xE1510000); // cmp r1, r0
+                        o4(0x03A00001); // moveq r0,#1
+                        o4(0x13A00000); // movne r0,#0
+                        break;
+                    case TY_FLOAT:
+#ifdef ARM_USE_VFP
+                        o4(0xEEF57A40); // fcmpzs s15
+                        o4(0xEEF1FA10); // fmstat
+                        o4(0x03A00001); // moveq r0,#1
+                        o4(0x13A00000); // movne r0,#0
+#else
+                        callRuntime((void*) runtime_is_zero_f);
+#endif
+                        break;
+                    case TY_DOUBLE:
+#ifdef ARM_USE_VFP
+                        o4(0xEEB57B40); // fcmpzd d7
+                        o4(0xEEF1FA10); // fmstat
+                        o4(0x03A00001); // moveq r0,#1
+                        o4(0x13A00000); // movne r0,#0
+#else
+                        callRuntime((void*) runtime_is_zero_d);
+#endif
+                        break;
+                    default:
+                        error("gUnaryCmp unsupported type");
+                        break;
+                }
+            }
+            setR0Type(mkpInt);
+        }
+
+        virtual void genUnaryOp(int op) {
+            Type* pR0Type = getR0Type();
+            TypeTag tag = collapseType(pR0Type->tag);
+            switch(tag) {
+                case TY_INT:
+                    switch(op) {
+                    case OP_MINUS:
+                        o4(0xE3A01000);  // mov    r1, #0
+                        o4(0xE0410000);  // sub     r0,r1,r0
+                        break;
+                    case OP_BIT_NOT:
+                        o4(0xE1E00000);  // mvn     r0, r0
+                        break;
+                    default:
+                        error("Unknown unary op %d\n", op);
+                        break;
+                    }
+                    break;
+                case TY_FLOAT:
+                case TY_DOUBLE:
+                    switch (op) {
+                        case OP_MINUS:
+                            if (tag == TY_FLOAT) {
+#ifdef ARM_USE_VFP
+                                o4(0xEEF17A67); // fnegs    s15, s15
+#else
+                                callRuntime((void*) runtime_op_neg_f);
+#endif
+                            } else {
+#ifdef ARM_USE_VFP
+                                o4(0xEEB17B47); // fnegd    d7, d7
+#else
+                                callRuntime((void*) runtime_op_neg_d);
+#endif
+                            }
+                            break;
+                        case OP_BIT_NOT:
+                            error("Can't apply '~' operator to a float or double.");
+                            break;
+                        default:
+                            error("Unknown unary op %d\n", op);
+                            break;
+                        }
+                    break;
+                default:
+                    error("genUnaryOp unsupported type");
+                    break;
+            }
+        }
+
+        virtual void pushR0() {
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+
+#ifdef ARM_USE_VFP
+            switch (r0ct ) {
+            case TY_FLOAT:
+                o4(0xED6D7A01); // fstmfds   sp!,{s15}
+                mStackUse += 4;
+                break;
+            case TY_DOUBLE:
+                o4(0xED2D7B02); // fstmfdd   sp!,{d7}
+                mStackUse += 8;
+                break;
+            default:
+                o4(0xE92D0001);  // stmfd   sp!,{r0}
+                mStackUse += 4;
+            }
+#else
+
+            if (r0ct != TY_DOUBLE) {
+                    o4(0xE92D0001);  // stmfd   sp!,{r0}
+                    mStackUse += 4;
+            } else {
+                    o4(0xE92D0003);  // stmfd   sp!,{r0,r1}
+                    mStackUse += 8;
+            }
+#endif
+            pushType();
+            LOG_STACK("pushR0: %d\n", mStackUse);
+        }
+
+        virtual void over() {
+            // We know it's only used for int-ptr ops (++/--)
+
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+
+            Type* pTOSType = getTOSType();
+            TypeTag tosct = collapseType(pTOSType->tag);
+
+            assert (r0ct == TY_INT  && tosct == TY_INT);
+
+            o4(0xE8BD0002);  // ldmfd   sp!,{r1}
+            o4(0xE92D0001);  // stmfd   sp!,{r0}
+            o4(0xE92D0002);  // stmfd   sp!,{r1}
+            overType();
+            mStackUse += 4;
+        }
+
+        virtual void popR0() {
+            Type* pTOSType = getTOSType();
+            TypeTag tosct = collapseType(pTOSType->tag);
+#ifdef ARM_USE_VFP
+            if (tosct == TY_FLOAT || tosct == TY_DOUBLE) {
+                error("Unsupported popR0 float/double");
+            }
+#endif
+            switch (tosct){
+                case TY_INT:
+                case TY_FLOAT:
+                    o4(0xE8BD0001);  // ldmfd   sp!,{r0}
+                    mStackUse -= 4;
+                    break;
+                case TY_DOUBLE:
+                    o4(0xE8BD0003);  // ldmfd   sp!,{r0, r1}  // Restore R0
+                        mStackUse -= 8;
+                    break;
+                default:
+                    error("Can't pop this type.");
+                    break;
+            }
+            popType();
+            LOG_STACK("popR0: %d\n", mStackUse);
+        }
+
+        virtual void storeR0ToTOS() {
+            Type* pPointerType = getTOSType();
+            assert(pPointerType->tag == TY_POINTER);
+            Type* pDestType = pPointerType->pHead;
+            convertR0(pDestType);
+            o4(0xE8BD0004);  // ldmfd   sp!,{r2}
+            popType();
+            mStackUse -= 4;
+            switch (pDestType->tag) {
+                case TY_POINTER:
+                case TY_INT:
+                    o4(0xE5820000); // str r0, [r2]
+                    break;
+                case TY_FLOAT:
+#ifdef ARM_USE_VFP
+                    o4(0xEDC27A00); // fsts    s15, [r2, #0]
+#else
+                    o4(0xE5820000); // str r0, [r2]
+#endif
+                    break;
+                case TY_SHORT:
+                    o4(0xE1C200B0); // strh r0, [r2]
+                    break;
+                case TY_CHAR:
+                    o4(0xE5C20000); // strb r0, [r2]
+                    break;
+                case TY_DOUBLE:
+#ifdef ARM_USE_VFP
+                    o4(0xED827B00); // fstd    d7, [r2, #0]
+#else
+                    o4(0xE1C200F0); // strd r0, [r2]
+#endif
+                    break;
+                case TY_STRUCT:
+                {
+                    int size = sizeOf(pDestType);
+                    if (size > 0) {
+                        liReg(size, 1);
+                        callRuntime((void*) runtime_structCopy);
+                    }
+                }
+                    break;
+                default:
+                    error("storeR0ToTOS: unimplemented type %d",
+                            pDestType->tag);
+                    break;
+            }
+            setR0Type(pDestType);
+        }
+
+        virtual void loadR0FromR0() {
+            Type* pPointerType = getR0Type();
+            assert(pPointerType->tag == TY_POINTER);
+            Type* pNewType = pPointerType->pHead;
+            TypeTag tag = pNewType->tag;
+            switch (tag) {
+                case TY_POINTER:
+                case TY_INT:
+                    o4(0xE5900000); // ldr r0, [r0]
+                    break;
+                case TY_FLOAT:
+#ifdef ARM_USE_VFP
+                    o4(0xEDD07A00); // flds    s15, [r0, #0]
+#else
+                    o4(0xE5900000); // ldr r0, [r0]
+#endif
+                    break;
+                case TY_SHORT:
+                    o4(0xE1D000F0); // ldrsh r0, [r0]
+                    break;
+                case TY_CHAR:
+                    o4(0xE5D00000); // ldrb r0, [r0]
+                    break;
+                case TY_DOUBLE:
+#ifdef ARM_USE_VFP
+                    o4(0xED907B00); // fldd    d7, [r0, #0]
+#else
+                    o4(0xE1C000D0); // ldrd   r0, [r0]
+#endif
+                    break;
+                case TY_ARRAY:
+                    pNewType = pNewType->pTail;
+                    break;
+                case TY_STRUCT:
+                    break;
+                default:
+                    error("loadR0FromR0: unimplemented type %d", tag);
+                    break;
+            }
+            setR0Type(pNewType);
+        }
+
+        virtual void leaR0(int ea, Type* pPointerType, ExpressionType et) {
+            if (ea > -LOCAL && ea < LOCAL) {
+                // Local, fp relative
+
+                size_t immediate = 0;
+                bool inRange = false;
+                if (ea < 0) {
+                    inRange = encode12BitImmediate(-ea, &immediate);
+                    o4(0xE24B0000 | immediate); // sub    r0, fp, #ea
+                } else {
+                    inRange = encode12BitImmediate(ea, &immediate);
+                    o4(0xE28B0000 | immediate); // add    r0, fp, #ea
+                }
+                if (! inRange) {
+                    error("Offset out of range: %08x", ea);
+                }
+            } else {
+                // Global, absolute.
+                o4(0xE59F0000); //        ldr    r0, .L1
+                o4(0xEA000000); //        b .L99
+                o4(ea);         // .L1:   .word 0
+                                // .L99:
+            }
+            setR0Type(pPointerType, et);
+        }
+
+        virtual int leaForward(int ea, Type* pPointerType) {
+            setR0Type(pPointerType);
+            int result = ea;
+            int pc = getPC();
+            int offset = 0;
+            if (ea) {
+                offset = (pc - ea - 8) >> 2;
+                if ((offset & 0xffff) != offset) {
+                    error("function forward reference out of bounds");
+                }
+            } else {
+                offset = 0;
+            }
+            o4(0xE59F0000 | offset); //        ldr    r0, .L1
+
+            if (ea == 0) {
+                o4(0xEA000000); //        b .L99
+                result = getPC();
+                o4(ea);         // .L1:   .word 0
+                            // .L99:
+            }
+            return result;
+        }
+
+        virtual void convertR0Imp(Type* pType, bool isCast){
+            Type* pR0Type = getR0Type();
+            if (isPointerType(pType) && isPointerType(pR0Type)) {
+                Type* pA = pR0Type;
+                Type* pB = pType;
+                // Array decays to pointer
+                if (pA->tag == TY_ARRAY && pB->tag == TY_POINTER) {
+                    pA = pA->pTail;
+                }
+                if (! (typeEqual(pA, pB)
+                        || pB->pHead->tag == TY_VOID
+                        || (pA->tag == TY_POINTER && pB->tag == TY_POINTER && isCast)
+                    )) {
+                    error("Incompatible pointer or array types");
+                }
+            } else if (bitsSame(pType, pR0Type)) {
+                // do nothing special
+            } else {
+                TypeTag r0Tag = collapseType(pR0Type->tag);
+                TypeTag destTag = collapseType(pType->tag);
+                if (r0Tag == TY_INT) {
+                    if (destTag == TY_FLOAT) {
+#ifdef ARM_USE_VFP
+                        o4(0xEE070A90); // fmsr    s15, r0
+                        o4(0xEEF87AE7); // fsitos s15, s15
+
+#else
+                        callRuntime((void*) runtime_int_to_float);
+#endif
+                    } else {
+                        assert(destTag == TY_DOUBLE);
+#ifdef ARM_USE_VFP
+                        o4(0xEE070A90); // fmsr s15, r0
+                        o4(0xEEB87BE7); // fsitod d7, s15
+
+#else
+                        callRuntime((void*) runtime_int_to_double);
+#endif
+                    }
+                } else if (r0Tag == TY_FLOAT) {
+                    if (destTag == TY_INT) {
+#ifdef ARM_USE_VFP
+                        o4(0xEEFD7AE7); // ftosizs s15, s15
+                        o4(0xEE170A90); // fmrs r0, s15
+#else
+                        callRuntime((void*) runtime_float_to_int);
+#endif
+                    } else {
+                        assert(destTag == TY_DOUBLE);
+#ifdef ARM_USE_VFP
+                        o4(0xEEB77AE7); // fcvtds    d7, s15
+#else
+                        callRuntime((void*) runtime_float_to_double);
+#endif
+                    }
+                } else {
+                    if (r0Tag == TY_DOUBLE) {
+                        if (destTag == TY_INT) {
+#ifdef ARM_USE_VFP
+                            o4(0xEEFD7BC7); // ftosizd s15, d7
+                            o4(0xEE170A90); // fmrs r0, s15
+#else
+                            callRuntime((void*) runtime_double_to_int);
+#endif
+                        } else {
+                            if(destTag == TY_FLOAT) {
+#ifdef ARM_USE_VFP
+                                o4(0xEEF77BC7); // fcvtsd s15, d7
+#else
+                                callRuntime((void*) runtime_double_to_float);
+#endif
+                            } else {
+                                incompatibleTypes(pR0Type, pType);
+                            }
+                        }
+                    } else {
+                        incompatibleTypes(pR0Type, pType);
+                    }
+                }
+            }
+            setR0Type(pType);
+        }
+
+        virtual int beginFunctionCallArguments() {
+            int pc = getPC();
+            o4(0xE24DDF00); // Placeholder sub  sp, sp, #0
+            return pc;
+        }
+
+        virtual size_t storeR0ToArg(int l, Type* pArgType) {
+            convertR0(pArgType);
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+#ifdef ARM_USE_VFP
+            switch(r0ct) {
+                case TY_INT:
+                    if (l < 0 || l > 4096-4) {
+                        error("l out of range for stack offset: 0x%08x", l);
+                    }
+                    o4(0xE58D0000 | l); // str r0, [sp, #l]
+                    return 4;
+                case TY_FLOAT:
+                    if (l < 0 || l > 1020 || (l & 3)) {
+                        error("l out of range for stack offset: 0x%08x", l);
+                    }
+                    o4(0xEDCD7A00 | (l >> 2)); // fsts    s15, [sp, #l]
+                    return 4;
+                case TY_DOUBLE: {
+                    // Align to 8 byte boundary
+                    int l2 = (l + 7) & ~7;
+                    if (l2 < 0 || l2 > 1020 || (l2 & 3)) {
+                        error("l out of range for stack offset: 0x%08x", l);
+                    }
+                    o4(0xED8D7B00 | (l2 >> 2)); // fstd    d7, [sp, #l2]
+                    return (l2 - l) + 8;
+                }
+                default:
+                    assert(false);
+                    return 0;
+            }
+#else
+            switch(r0ct) {
+                case TY_INT:
+                case TY_FLOAT:
+                    if (l < 0 || l > 4096-4) {
+                        error("l out of range for stack offset: 0x%08x", l);
+                    }
+                    o4(0xE58D0000 + l); // str r0, [sp, #l]
+                    return 4;
+                case TY_DOUBLE: {
+                    // Align to 8 byte boundary
+                    int l2 = (l + 7) & ~7;
+                    if (l2 < 0 || l2 > 4096-8) {
+                        error("l out of range for stack offset: 0x%08x", l);
+                    }
+                    o4(0xE58D0000 + l2); // str r0, [sp, #l]
+                    o4(0xE58D1000 + l2 + 4); // str r1, [sp, #l+4]
+                    return (l2 - l) + 8;
+                }
+                default:
+                    assert(false);
+                    return 0;
+            }
+#endif
+        }
+
+        virtual void endFunctionCallArguments(Type* pDecl, int a, int l) {
+            int argumentStackUse = l;
+            // Have to calculate register arg count from actual stack size,
+            // in order to properly handle ... functions.
+            int regArgCount = l >> 2;
+            if (regArgCount > 4) {
+                regArgCount = 4;
+            }
+            if (regArgCount > 0) {
+                argumentStackUse -= regArgCount * 4;
+                o4(0xE8BD0000 | ((1 << regArgCount) - 1)); // ldmfd   sp!,{}
+            }
+            mStackUse += argumentStackUse;
+
+            // Align stack.
+            int missalignment = mStackUse - ((mStackUse / STACK_ALIGNMENT)
+                    * STACK_ALIGNMENT);
+            mStackAlignmentAdjustment = 0;
+            if (missalignment > 0) {
+                mStackAlignmentAdjustment = STACK_ALIGNMENT - missalignment;
+            }
+            l += mStackAlignmentAdjustment;
+
+            if (l < 0 || l > 0x3FC) {
+                error("L out of range for stack adjustment: 0x%08x", l);
+            }
+            flush();
+            * (int*) a = 0xE24DDF00 | (l >> 2); // sub    sp, sp, #0 << 2
+            mStackUse += mStackAlignmentAdjustment;
+            LOG_STACK("endFunctionCallArguments mStackUse: %d, mStackAlignmentAdjustment %d\n",
+                      mStackUse, mStackAlignmentAdjustment);
+        }
+
+        virtual int callForward(int symbol, Type* pFunc) {
+            setR0Type(pFunc->pHead);
+            // Forward calls are always short (local)
+            int pc = getPC();
+            o4(0xEB000000 | encodeAddress(symbol));
+            return pc;
+        }
+
+        virtual void callIndirect(int l, Type* pFunc) {
+            assert(pFunc->tag == TY_FUNC);
+            popType(); // Get rid of indirect fn pointer type
+            int argCount = l >> 2;
+            int poppedArgs = argCount > 4 ? 4 : argCount;
+            int adjustedL = l - (poppedArgs << 2) + mStackAlignmentAdjustment;
+            if (adjustedL < 0 || adjustedL > 4096-4) {
+                error("l out of range for stack offset: 0x%08x", l);
+            }
+            o4(0xE59DC000 | (0xfff & adjustedL)); // ldr    r12, [sp,#adjustedL]
+            o4(0xE12FFF3C); // blx r12
+            Type* pReturnType = pFunc->pHead;
+            setR0Type(pReturnType);
+#ifdef ARM_USE_VFP
+            switch(pReturnType->tag) {
+            case TY_FLOAT:
+                o4(0xEE070A90); // fmsr s15, r0
+                break;
+            case TY_DOUBLE:
+                o4(0xEC410B17); // fmdrr d7, r0, r1
+                break;
+            default:
+                break;
+            }
+#endif
+        }
+
+        virtual void adjustStackAfterCall(Type* pDecl, int l, bool isIndirect) {
+            int argCount = l >> 2;
+            // Have to calculate register arg count from actual stack size,
+            // in order to properly handle ... functions.
+            int regArgCount = l >> 2;
+            if (regArgCount > 4) {
+                regArgCount = 4;
+            }
+            int stackArgs = argCount - regArgCount;
+            int stackUse =  stackArgs + (isIndirect ? 1 : 0)
+                + (mStackAlignmentAdjustment >> 2);
+            if (stackUse) {
+                if (stackUse < 0 || stackUse > 255) {
+                    error("L out of range for stack adjustment: 0x%08x", l);
+                }
+                o4(0xE28DDF00 | stackUse); // add    sp, sp, #stackUse << 2
+                mStackUse -= stackUse * 4;
+                LOG_STACK("adjustStackAfterCall: %d\n", mStackUse);
+            }
+        }
+
+        virtual int jumpOffset() {
+            return 8;
+        }
+
+        /* output a symbol and patch all calls to it */
+        virtual void gsym(int t) {
+            int n;
+            int base = getBase();
+            int pc = getPC();
+            while (t) {
+                int data = * (int*) t;
+                int decodedOffset = ((BRANCH_REL_ADDRESS_MASK & data) << 2);
+                if (decodedOffset == 0) {
+                    n = 0;
+                } else {
+                    n = base + decodedOffset; /* next value */
+                }
+                *(int *) t = (data & ~BRANCH_REL_ADDRESS_MASK)
+                    | encodeRelAddress(pc - t - 8);
+                t = n;
+            }
+        }
+
+        /* output a symbol and patch all calls to it */
+        virtual void resolveForward(int t) {
+            if (t) {
+                int pc = getPC();
+                *(int *) t = pc;
+            }
+        }
+
+        virtual int finishCompile() {
+#if defined(__arm__)
+            const long base = long(getBase());
+            const long curr = long(getPC());
+            int err = cacheflush(base, curr, 0);
+            return err;
+#else
+            return 0;
+#endif
+        }
+
+        /**
+         * alignment (in bytes) for this type of data
+         */
+        virtual size_t alignmentOf(Type* pType){
+            switch(pType->tag) {
+                case TY_CHAR:
+                    return 1;
+                case TY_SHORT:
+                    return 2;
+                case TY_DOUBLE:
+                    return 8;
+                case TY_ARRAY:
+                    return alignmentOf(pType->pHead);
+                case TY_STRUCT:
+                    return pType->pHead->alignment & 0x7fffffff;
+                case TY_FUNC:
+                    error("alignment of func not supported");
+                    return 1;
+                default:
+                    return 4;
+            }
+        }
+
+        /**
+         * Array element alignment (in bytes) for this type of data.
+         */
+        virtual size_t sizeOf(Type* pType){
+            switch(pType->tag) {
+                case TY_INT:
+                    return 4;
+                case TY_SHORT:
+                    return 2;
+                case TY_CHAR:
+                    return 1;
+                case TY_FLOAT:
+                    return 4;
+                case TY_DOUBLE:
+                    return 8;
+                case TY_POINTER:
+                    return 4;
+                case TY_ARRAY:
+                    return pType->length * sizeOf(pType->pHead);
+                case TY_STRUCT:
+                    return pType->pHead->length;
+                default:
+                    error("Unsupported type %d", pType->tag);
+                    return 0;
+            }
+        }
+
+    private:
+
+        static const int BRANCH_REL_ADDRESS_MASK = 0x00ffffff;
+
+        /** Encode a relative address that might also be
+         * a label.
+         */
+        int encodeAddress(int value) {
+            int base = getBase();
+            if (value >= base && value <= getPC() ) {
+                // This is a label, encode it relative to the base.
+                value = value - base;
+            }
+            return encodeRelAddress(value);
+        }
+
+        int encodeRelAddress(int value) {
+            return BRANCH_REL_ADDRESS_MASK & (value >> 2);
+        }
+
+        int calcRegArgCount(Type* pDecl) {
+            int reg = 0;
+            Type* pArgs = pDecl->pTail;
+            while (pArgs && reg < 4) {
+                Type* pArg = pArgs->pHead;
+                if ( pArg->tag == TY_DOUBLE) {
+                    int evenReg = (reg + 1) & ~1;
+                    if (evenReg >= 4) {
+                        break;
+                    }
+                    reg = evenReg + 2;
+                } else {
+                    reg++;
+                }
+                pArgs = pArgs->pTail;
+            }
+            return reg;
+        }
+
+        void setupIntPtrArgs() {
+            o4(0xE8BD0002);  // ldmfd   sp!,{r1}
+            mStackUse -= 4;
+            popType();
+        }
+
+        /* Pop TOS to R1 (use s14 if VFP)
+         * Make sure both R0 and TOS are floats. (Could be ints)
+         * We know that at least one of R0 and TOS is already a float
+         */
+        void setupFloatArgs() {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = collapseType(pR0Type->tag);
+            TypeTag tagTOS = collapseType(pTOSType->tag);
+            if (tagR0 != TY_FLOAT) {
+                assert(tagR0 == TY_INT);
+#ifdef ARM_USE_VFP
+                o4(0xEE070A90); // fmsr    s15, r0
+                o4(0xEEF87AE7); // fsitos s15, s15
+#else
+                callRuntime((void*) runtime_int_to_float);
+#endif
+            }
+            if (tagTOS != TY_FLOAT) {
+                assert(tagTOS == TY_INT);
+                assert(tagR0 == TY_FLOAT);
+#ifdef ARM_USE_VFP
+                o4(0xECBD7A01); // fldmfds sp!, {s14}
+                o4(0xEEB87AC7); // fsitos s14, s14
+#else
+                o4(0xE92D0001);  // stmfd   sp!,{r0}  // push R0
+                o4(0xE59D0004);  // ldr     r0, [sp, #4]
+                callRuntime((void*) runtime_int_to_float);
+                o4(0xE1A01000);  // mov r1, r0
+                o4(0xE8BD0001);  // ldmfd   sp!,{r0}  // pop R0
+                o4(0xE28DD004);  // add sp, sp, #4 // Pop sp
+#endif
+            } else {
+                // Pop TOS
+#ifdef ARM_USE_VFP
+                o4(0xECBD7A01); // fldmfds sp!, {s14}
+
+#else
+                o4(0xE8BD0002);  // ldmfd   sp!,{r1}
+#endif
+            }
+            mStackUse -= 4;
+            popType();
+        }
+
+        /* Pop TOS into R2..R3 (use D6 if VFP)
+         * Make sure both R0 and TOS are doubles. Could be floats or ints.
+         * We know that at least one of R0 and TOS are already a double.
+         */
+
+        void setupDoubleArgs() {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = collapseType(pR0Type->tag);
+            TypeTag tagTOS = collapseType(pTOSType->tag);
+            if (tagR0 != TY_DOUBLE) {
+                if (tagR0 == TY_INT) {
+#ifdef ARM_USE_VFP
+                    o4(0xEE070A90); // fmsr s15, r0
+                    o4(0xEEB87BE7); // fsitod d7, s15
+
+#else
+                    callRuntime((void*) runtime_int_to_double);
+#endif
+                } else {
+                    assert(tagR0 == TY_FLOAT);
+#ifdef ARM_USE_VFP
+                    o4(0xEEB77AE7); // fcvtds    d7, s15
+#else
+                    callRuntime((void*) runtime_float_to_double);
+#endif
+                }
+            }
+            if (tagTOS != TY_DOUBLE) {
+#ifdef ARM_USE_VFP
+                if (tagTOS == TY_INT) {
+                    o4(0xECFD6A01);  // fldmfds sp!,{s13}
+                    o4(0xEEB86BE6);  // fsitod  d6, s13
+                } else {
+                    assert(tagTOS == TY_FLOAT);
+                    o4(0xECFD6A01);  // fldmfds sp!,{s13}
+                    o4(0xEEB76AE6);  // fcvtds    d6, s13
+                }
+#else
+                o4(0xE92D0003);  // stmfd   sp!,{r0,r1}  // push r0,r1
+                o4(0xE59D0008);  // ldr     r0, [sp, #8]
+                if (tagTOS == TY_INT) {
+                    callRuntime((void*) runtime_int_to_double);
+                } else {
+                    assert(tagTOS == TY_FLOAT);
+                    callRuntime((void*) runtime_float_to_double);
+                }
+                o4(0xE1A02000);  // mov r2, r0
+                o4(0xE1A03001);  // mov r3, r1
+                o4(0xE8BD0003);  // ldmfd   sp!,{r0, r1}  // Restore R0
+                o4(0xE28DD004);  // add sp, sp, #4 // Pop sp
+#endif
+                mStackUse -= 4;
+            } else {
+#ifdef ARM_USE_VFP
+                o4(0xECBD6B02);  // fldmfdd    sp!, {d6}
+#else
+                o4(0xE8BD000C);  // ldmfd   sp!,{r2,r3}
+#endif
+                mStackUse -= 8;
+            }
+            popType();
+        }
+
+        void liReg(int t, int reg) {
+            assert(reg >= 0 && reg < 16);
+            int rN = (reg & 0xf) << 12;
+            size_t encodedImmediate;
+            if (encode12BitImmediate(t, &encodedImmediate)) {
+                 o4(0xE3A00000 | encodedImmediate | rN); // mov    rN, #0
+            } else if (encode12BitImmediate(-(t+1), &encodedImmediate)) {
+                // mvn means move constant ^ ~0
+                o4(0xE3E00000 | encodedImmediate | rN); // mvn    rN, #0
+            } else {
+                o4(0xE51F0000 | rN); //         ldr    rN, .L3
+                o4(0xEA000000); //         b .L99
+                o4(t);          // .L3:   .word 0
+                                  // .L99:
+            }
+        }
+
+        void incompatibleTypes(Type* pR0Type, Type* pType) {
+            error("Incompatible types old: %d new: %d", pR0Type->tag, pType->tag);
+        }
+
+        void callRuntime(void* fn) {
+            o4(0xE59FC000); // ldr    r12, .L1
+            o4(0xEA000000); // b      .L99
+            o4((int) fn);   //.L1:  .word  fn
+            o4(0xE12FFF3C); //.L99: blx    r12
+        }
+
+        // Integer math:
+
+        static int runtime_DIV(int b, int a) {
+            return a / b;
+        }
+
+        static int runtime_MOD(int b, int a) {
+            return a % b;
+        }
+
+        static void runtime_structCopy(void* src, size_t size, void* dest) {
+            memcpy(dest, src, size);
+        }
+
+#ifndef ARM_USE_VFP
+
+        // Comparison to zero
+
+        static int runtime_is_non_zero_f(float a) {
+            return a != 0;
+        }
+
+        static int runtime_is_non_zero_d(double a) {
+            return a != 0;
+        }
+
+        // Comparison to zero
+
+        static int runtime_is_zero_f(float a) {
+            return a == 0;
+        }
+
+        static int runtime_is_zero_d(double a) {
+            return a == 0;
+        }
+
+        // Type conversion
+
+        static int runtime_float_to_int(float a) {
+            return (int) a;
+        }
+
+        static double runtime_float_to_double(float a) {
+            return (double) a;
+        }
+
+        static int runtime_double_to_int(double a) {
+            return (int) a;
+        }
+
+        static float runtime_double_to_float(double a) {
+            return (float) a;
+        }
+
+        static float runtime_int_to_float(int a) {
+            return (float) a;
+        }
+
+        static double runtime_int_to_double(int a) {
+            return (double) a;
+        }
+
+        // Comparisons float
+
+        static int runtime_cmp_eq_ff(float b, float a) {
+            return a == b;
+        }
+
+        static int runtime_cmp_ne_ff(float b, float a) {
+            return a != b;
+        }
+
+        static int runtime_cmp_lt_ff(float b, float a) {
+            return a < b;
+        }
+
+        static int runtime_cmp_le_ff(float b, float a) {
+            return a <= b;
+        }
+
+        static int runtime_cmp_ge_ff(float b, float a) {
+            return a >= b;
+        }
+
+        static int runtime_cmp_gt_ff(float b, float a) {
+            return a > b;
+        }
+
+        // Comparisons double
+
+        static int runtime_cmp_eq_dd(double b, double a) {
+            return a == b;
+        }
+
+        static int runtime_cmp_ne_dd(double b, double a) {
+            return a != b;
+        }
+
+        static int runtime_cmp_lt_dd(double b, double a) {
+            return a < b;
+        }
+
+        static int runtime_cmp_le_dd(double b, double a) {
+            return a <= b;
+        }
+
+        static int runtime_cmp_ge_dd(double b, double a) {
+            return a >= b;
+        }
+
+        static int runtime_cmp_gt_dd(double b, double a) {
+            return a > b;
+        }
+
+        // Math float
+
+        static float runtime_op_add_ff(float b, float a) {
+            return a + b;
+        }
+
+        static float runtime_op_sub_ff(float b, float a) {
+            return a - b;
+        }
+
+        static float runtime_op_mul_ff(float b, float a) {
+            return a * b;
+        }
+
+        static float runtime_op_div_ff(float b, float a) {
+            return a / b;
+        }
+
+        static float runtime_op_neg_f(float a) {
+            return -a;
+        }
+
+        // Math double
+
+        static double runtime_op_add_dd(double b, double a) {
+            return a + b;
+        }
+
+        static double runtime_op_sub_dd(double b, double a) {
+            return a - b;
+        }
+
+        static double runtime_op_mul_dd(double b, double a) {
+            return a * b;
+        }
+
+        static double runtime_op_div_dd(double b, double a) {
+            return a / b;
+        }
+
+        static double runtime_op_neg_d(double a) {
+            return -a;
+        }
+
+#endif
+
+        static const int STACK_ALIGNMENT = 8;
+        int mStackUse;
+        // This variable holds the amount we adjusted the stack in the most
+        // recent endFunctionCallArguments call. It's examined by the
+        // following adjustStackAfterCall call.
+        int mStackAlignmentAdjustment;
+    };
+
+#endif // PROVIDE_ARM_CODEGEN
+
+#ifdef PROVIDE_X86_CODEGEN
+
+    class X86CodeGenerator : public CodeGenerator {
+    public:
+        X86CodeGenerator() {}
+        virtual ~X86CodeGenerator() {}
+
+        /* returns address to patch with local variable size
+        */
+        virtual int functionEntry(Type* pDecl) {
+            o(0xe58955); /* push   %ebp, mov %esp, %ebp */
+            return oad(0xec81, 0); /* sub $xxx, %esp */
+        }
+
+        virtual void functionExit(Type* pDecl, int localVariableAddress, int localVariableSize) {
+            o(0xc3c9); /* leave, ret */
+            *(int *) localVariableAddress = localVariableSize; /* save local variables */
+        }
+
+        /* load immediate value */
+        virtual void li(int i) {
+            oad(0xb8, i); /* mov $xx, %eax */
+            setR0Type(mkpInt);
+        }
+
+        virtual void loadFloat(int address, Type* pType) {
+            setR0Type(pType);
+            switch (pType->tag) {
+            case TY_FLOAT:
+                oad(0x05D9, address);      // flds
+                break;
+            case TY_DOUBLE:
+                oad(0x05DD, address);      // fldl
+                break;
+            default:
+                assert(false);
+                break;
+            }
+        }
+
+        virtual void addStructOffsetR0(int offset, Type* pType) {
+            if (offset) {
+                oad(0x05, offset); // addl offset, %eax
+            }
+            setR0Type(pType, ET_LVALUE);
+        }
+
+        virtual int gjmp(int t) {
+            return psym(0xe9, t);
+        }
+
+        /* l = 0: je, l == 1: jne */
+        virtual int gtst(bool l, int t) {
+            Type* pR0Type = getR0Type();
+            TypeTag tagR0 = pR0Type->tag;
+            bool isFloatR0 = isFloatTag(tagR0);
+            if (isFloatR0) {
+                o(0xeed9); // fldz
+                o(0xe9da); // fucompp
+                o(0xe0df); // fnstsw %ax
+                o(0x9e);   // sahf
+            } else {
+                o(0xc085); // test %eax, %eax
+            }
+            // Use two output statements to generate one instruction.
+            o(0x0f);   // je/jne xxx
+            return psym(0x84 + l, t);
+        }
+
+        virtual void gcmp(int op) {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = pR0Type->tag;
+            TypeTag tagTOS = pTOSType->tag;
+            bool isFloatR0 = isFloatTag(tagR0);
+            bool isFloatTOS = isFloatTag(tagTOS);
+            if (!isFloatR0 && !isFloatTOS) {
+                int t = decodeOp(op);
+                o(0x59); /* pop %ecx */
+                o(0xc139); /* cmp %eax,%ecx */
+                li(0);
+                o(0x0f); /* setxx %al */
+                o(t + 0x90);
+                o(0xc0);
+                popType();
+            } else {
+                setupFloatOperands();
+                switch (op) {
+                    case OP_EQUALS:
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x9e);     // sahf
+                        o(0xc0940f); // sete %al
+                        o(0xc29b0f); // setnp %dl
+                        o(0xd021);   // andl %edx, %eax
+                        break;
+                    case OP_NOT_EQUALS:
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x9e);     // sahf
+                        o(0xc0950f); // setne %al
+                        o(0xc29a0f); // setp %dl
+                        o(0xd009);   // orl %edx, %eax
+                        break;
+                    case OP_GREATER_EQUAL:
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x05c4f6); // testb $5, %ah
+                        o(0xc0940f); // sete %al
+                        break;
+                    case OP_LESS:
+                        o(0xc9d9);   // fxch %st(1)
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x9e);     // sahf
+                        o(0xc0970f); // seta %al
+                        break;
+                    case OP_LESS_EQUAL:
+                        o(0xc9d9);   // fxch %st(1)
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x9e);     // sahf
+                        o(0xc0930f); // setea %al
+                        break;
+                    case OP_GREATER:
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x45c4f6); // testb $69, %ah
+                        o(0xc0940f); // sete %al
+                        break;
+                    default:
+                        error("Unknown comparison op");
+                }
+                o(0xc0b60f); // movzbl %al, %eax
+            }
+            setR0Type(mkpInt);
+        }
+
+        virtual void genOp(int op) {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = pR0Type->tag;
+            TypeTag tagTOS = pTOSType->tag;
+            bool isFloatR0 = isFloatTag(tagR0);
+            bool isFloatTOS = isFloatTag(tagTOS);
+            if (!isFloatR0 && !isFloatTOS) {
+                bool isPtrR0 = isPointerTag(tagR0);
+                bool isPtrTOS = isPointerTag(tagTOS);
+                if (isPtrR0 || isPtrTOS) {
+                    if (isPtrR0 && isPtrTOS) {
+                        if (op != OP_MINUS) {
+                            error("Unsupported pointer-pointer operation %d.", op);
+                        }
+                        if (! typeEqual(pR0Type, pTOSType)) {
+                            error("Incompatible pointer types for subtraction.");
+                        }
+                        o(0x59); /* pop %ecx */
+                        o(decodeOp(op));
+                        popType();
+                        setR0Type(mkpInt);
+                        int size = sizeOf(pR0Type->pHead);
+                        if (size != 1) {
+                            pushR0();
+                            li(size);
+                            // TODO: Optimize for power-of-two.
+                            genOp(OP_DIV);
+                        }
+                    } else {
+                        if (! (op == OP_PLUS || (op == OP_MINUS && isPtrR0))) {
+                            error("Unsupported pointer-scalar operation %d", op);
+                        }
+                        Type* pPtrType = getPointerArithmeticResultType(
+                                pR0Type, pTOSType);
+                        o(0x59); /* pop %ecx */
+                        int size = sizeOf(pPtrType->pHead);
+                        if (size != 1) {
+                            // TODO: Optimize for power-of-two.
+                            if (isPtrR0) {
+                                oad(0xC969, size); // imull $size, %ecx
+                            } else {
+                                oad(0xC069, size); // mul $size, %eax
+                            }
+                        }
+                        o(decodeOp(op));
+                        popType();
+                        setR0Type(pPtrType);
+                    }
+                } else {
+                    o(0x59); /* pop %ecx */
+                    o(decodeOp(op));
+                    if (op == OP_MOD)
+                        o(0x92); /* xchg %edx, %eax */
+                    popType();
+                }
+            } else {
+                Type* pResultType = tagR0 > tagTOS ? pR0Type : pTOSType;
+                setupFloatOperands();
+                // Both float. x87 R0 == left hand, x87 R1 == right hand
+                switch (op) {
+                    case OP_MUL:
+                        o(0xc9de); // fmulp
+                        break;
+                    case OP_DIV:
+                        o(0xf1de); // fdivp
+                        break;
+                    case OP_PLUS:
+                        o(0xc1de); // faddp
+                        break;
+                    case OP_MINUS:
+                        o(0xe1de); // fsubp
+                        break;
+                    default:
+                        error("Unsupported binary floating operation.");
+                        break;
+                }
+                setR0Type(pResultType);
+            }
+        }
+
+        virtual void gUnaryCmp(int op) {
+            if (op != OP_LOGICAL_NOT) {
+                error("Unknown unary cmp %d", op);
+            } else {
+                Type* pR0Type = getR0Type();
+                TypeTag tag = collapseType(pR0Type->tag);
+                switch(tag) {
+                    case TY_INT: {
+                            oad(0xb9, 0); /* movl $0, %ecx */
+                            int t = decodeOp(op);
+                            o(0xc139); /* cmp %eax,%ecx */
+                            li(0);
+                            o(0x0f); /* setxx %al */
+                            o(t + 0x90);
+                            o(0xc0);
+                        }
+                        break;
+                    case TY_FLOAT:
+                    case TY_DOUBLE:
+                        o(0xeed9);   // fldz
+                        o(0xe9da);   // fucompp
+                        o(0xe0df);   // fnstsw %ax
+                        o(0x9e);     // sahf
+                        o(0xc0950f); // setne %al
+                        o(0xc29a0f); // setp %dl
+                        o(0xd009);   // orl %edx, %eax
+                        o(0xc0b60f); // movzbl %al, %eax
+                        o(0x01f083); // xorl $1,  %eax
+                        break;
+                    default:
+                        error("gUnaryCmp unsupported type");
+                        break;
+                }
+            }
+            setR0Type(mkpInt);
+        }
+
+        virtual void genUnaryOp(int op) {
+            Type* pR0Type = getR0Type();
+            TypeTag tag = collapseType(pR0Type->tag);
+            switch(tag) {
+                case TY_INT:
+                    oad(0xb9, 0); /* movl $0, %ecx */
+                    o(decodeOp(op));
+                    break;
+                case TY_FLOAT:
+                case TY_DOUBLE:
+                    switch (op) {
+                        case OP_MINUS:
+                            o(0xe0d9);  // fchs
+                            break;
+                        case OP_BIT_NOT:
+                            error("Can't apply '~' operator to a float or double.");
+                            break;
+                        default:
+                            error("Unknown unary op %d\n", op);
+                            break;
+                        }
+                    break;
+                default:
+                    error("genUnaryOp unsupported type");
+                    break;
+            }
+        }
+
+        virtual void pushR0() {
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+            switch(r0ct) {
+                case TY_INT:
+                    o(0x50); /* push %eax */
+                    break;
+                case TY_FLOAT:
+                    o(0x50); /* push %eax */
+                    o(0x241cd9); // fstps 0(%esp)
+                    break;
+                case TY_DOUBLE:
+                    o(0x50); /* push %eax */
+                    o(0x50); /* push %eax */
+                    o(0x241cdd); // fstpl 0(%esp)
+                    break;
+                default:
+                    error("pushR0 unsupported type %d", r0ct);
+                    break;
+            }
+            pushType();
+        }
+
+        virtual void over() {
+            // We know it's only used for int-ptr ops (++/--)
+
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+
+            Type* pTOSType = getTOSType();
+            TypeTag tosct = collapseType(pTOSType->tag);
+
+            assert (r0ct == TY_INT && tosct == TY_INT);
+
+            o(0x59); /* pop %ecx */
+            o(0x50); /* push %eax */
+            o(0x51); /* push %ecx */
+
+            overType();
+        }
+
+        virtual void popR0() {
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+            switch(r0ct) {
+                case TY_INT:
+                    o(0x58); /* popl %eax */
+                    break;
+                case TY_FLOAT:
+                    o(0x2404d9); // flds (%esp)
+                    o(0x58); /* popl %eax */
+                    break;
+                case TY_DOUBLE:
+                    o(0x2404dd); // fldl (%esp)
+                    o(0x58); /* popl %eax */
+                    o(0x58); /* popl %eax */
+                    break;
+                default:
+                    error("popR0 unsupported type %d", r0ct);
+                    break;
+            }
+            popType();
+        }
+
+        virtual void storeR0ToTOS() {
+            Type* pPointerType = getTOSType();
+            assert(pPointerType->tag == TY_POINTER);
+            Type* pTargetType = pPointerType->pHead;
+            convertR0(pTargetType);
+            o(0x59); /* pop %ecx */
+            popType();
+            switch (pTargetType->tag) {
+                case TY_POINTER:
+                case TY_INT:
+                    o(0x0189); /* movl %eax/%al, (%ecx) */
+                    break;
+                case TY_SHORT:
+                    o(0x018966); /* movw %ax, (%ecx) */
+                    break;
+                case TY_CHAR:
+                    o(0x0188); /* movl %eax/%al, (%ecx) */
+                    break;
+                case TY_FLOAT:
+                    o(0x19d9); /* fstps (%ecx) */
+                    break;
+                case TY_DOUBLE:
+                    o(0x19dd); /* fstpl (%ecx) */
+                    break;
+                case TY_STRUCT:
+                {
+                    // TODO: use alignment information to use movsw/movsl instead of movsb
+                    int size = sizeOf(pTargetType);
+                    if (size > 0) {
+                        o(0x9c);         // pushf
+                        o(0x57);         // pushl %edi
+                        o(0x56);         // pushl %esi
+                        o(0xcf89);       // movl %ecx, %edi
+                        o(0xc689);       // movl %eax, %esi
+                        oad(0xb9, size);  // mov #size, %ecx
+                        o(0xfc);         // cld
+                        o(0xf3);         // rep
+                        o(0xa4);         // movsb
+                        o(0x5e);         // popl %esi
+                        o(0x5f);         // popl %edi
+                        o(0x9d);         // popf
+                    }
+                }
+                    break;
+                default:
+                    error("storeR0ToTOS: unsupported type %d",
+                            pTargetType->tag);
+                    break;
+            }
+            setR0Type(pTargetType);
+        }
+
+        virtual void loadR0FromR0() {
+            Type* pPointerType = getR0Type();
+            assert(pPointerType->tag == TY_POINTER);
+            Type* pNewType = pPointerType->pHead;
+            TypeTag tag = pNewType->tag;
+            switch (tag) {
+                case TY_POINTER:
+                case TY_INT:
+                    o2(0x008b); /* mov (%eax), %eax */
+                    break;
+                case TY_SHORT:
+                    o(0xbf0f); /* movswl (%eax), %eax */
+                    ob(0);
+                    break;
+                case TY_CHAR:
+                    o(0xbe0f); /* movsbl (%eax), %eax */
+                    ob(0); /* add zero in code */
+                    break;
+                case TY_FLOAT:
+                    o2(0x00d9); // flds (%eax)
+                    break;
+                case TY_DOUBLE:
+                    o2(0x00dd); // fldl (%eax)
+                    break;
+                case TY_ARRAY:
+                    pNewType = pNewType->pTail;
+                    break;
+                case TY_STRUCT:
+                    break;
+                default:
+                    error("loadR0FromR0: unsupported type %d", tag);
+                    break;
+            }
+            setR0Type(pNewType);
+        }
+
+        virtual void leaR0(int ea, Type* pPointerType, ExpressionType et) {
+            gmov(10, ea); /* leal EA, %eax */
+            setR0Type(pPointerType, et);
+        }
+
+        virtual int leaForward(int ea, Type* pPointerType) {
+            oad(0xb8, ea); /* mov $xx, %eax */
+            setR0Type(pPointerType);
+            return getPC() - 4;
+        }
+
+        virtual void convertR0Imp(Type* pType, bool isCast){
+            Type* pR0Type = getR0Type();
+            if (pR0Type == NULL) {
+                assert(false);
+                setR0Type(pType);
+                return;
+            }
+            if (isPointerType(pType) && isPointerType(pR0Type)) {
+                Type* pA = pR0Type;
+                Type* pB = pType;
+                // Array decays to pointer
+                if (pA->tag == TY_ARRAY && pB->tag == TY_POINTER) {
+                    pA = pA->pTail;
+                }
+                if (! (typeEqual(pA, pB)
+                        || pB->pHead->tag == TY_VOID
+                        || (pA->tag == TY_POINTER && pB->tag == TY_POINTER && isCast)
+                    )) {
+                    error("Incompatible pointer or array types");
+                }
+            } else if (bitsSame(pType, pR0Type)) {
+                // do nothing special
+            } else if (isFloatType(pType) && isFloatType(pR0Type)) {
+                // do nothing special, both held in same register on x87.
+            } else {
+                TypeTag r0Tag = collapseType(pR0Type->tag);
+                TypeTag destTag = collapseType(pType->tag);
+                if (r0Tag == TY_INT && isFloatTag(destTag)) {
+                    // Convert R0 from int to float
+                    o(0x50);      // push %eax
+                    o(0x2404DB);  // fildl 0(%esp)
+                    o(0x58);      // pop %eax
+                } else if (isFloatTag(r0Tag) && destTag == TY_INT) {
+                    // Convert R0 from float to int. Complicated because
+                    // need to save and restore the rounding mode.
+                    o(0x50);       // push %eax
+                    o(0x50);       // push %eax
+                    o(0x02247cD9); // fnstcw 2(%esp)
+                    o(0x2444b70f); // movzwl 2(%esp), %eax
+                    o(0x02);
+                    o(0x0cb4);     // movb $12, %ah
+                    o(0x24048966); // movw %ax, 0(%esp)
+                    o(0x242cd9);   // fldcw 0(%esp)
+                    o(0x04245cdb); // fistpl 4(%esp)
+                    o(0x02246cd9); // fldcw  2(%esp)
+                    o(0x58); // pop %eax
+                    o(0x58); // pop %eax
+                } else {
+                    error("Incompatible types old: %d new: %d",
+                          pR0Type->tag, pType->tag);
+                }
+            }
+            setR0Type(pType);
+        }
+
+        virtual int beginFunctionCallArguments() {
+            return oad(0xec81, 0); /* sub $xxx, %esp */
+        }
+
+        virtual size_t storeR0ToArg(int l, Type* pArgType) {
+            convertR0(pArgType);
+            Type* pR0Type = getR0Type();
+            TypeTag r0ct = collapseType(pR0Type->tag);
+            switch(r0ct) {
+                case TY_INT:
+                    oad(0x248489, l); /* movl %eax, xxx(%esp) */
+                    return 4;
+                case TY_FLOAT:
+                    oad(0x249CD9, l); /* fstps   xxx(%esp) */
+                    return 4;
+                case TY_DOUBLE:
+                    oad(0x249CDD, l); /* fstpl   xxx(%esp) */
+                    return 8;
+                default:
+                    assert(false);
+                    return 0;
+            }
+        }
+
+        virtual void endFunctionCallArguments(Type* pDecl, int a, int l) {
+            * (int*) a = l;
+        }
+
+        virtual int callForward(int symbol, Type* pFunc) {
+            assert(pFunc->tag == TY_FUNC);
+            setR0Type(pFunc->pHead);
+            return psym(0xe8, symbol); /* call xxx */
+        }
+
+        virtual void callIndirect(int l, Type* pFunc) {
+            assert(pFunc->tag == TY_FUNC);
+            popType(); // Get rid of indirect fn pointer type
+            setR0Type(pFunc->pHead);
+            oad(0x2494ff, l); /* call *xxx(%esp) */
+        }
+
+        virtual void adjustStackAfterCall(Type* pDecl, int l, bool isIndirect) {
+            assert(pDecl->tag == TY_FUNC);
+            if (isIndirect) {
+                l += 4;
+            }
+            if (l > 0) {
+                oad(0xc481, l); /* add $xxx, %esp */
+            }
+        }
+
+        virtual int jumpOffset() {
+            return 5;
+        }
+
+        /* output a symbol and patch all calls to it */
+        virtual void gsym(int t) {
+            int n;
+            int pc = getPC();
+            while (t) {
+                n = *(int *) t; /* next value */
+                *(int *) t = pc - t - 4;
+                t = n;
+            }
+        }
+
+        /* output a symbol and patch all calls to it, using absolute address */
+        virtual void resolveForward(int t) {
+            int n;
+            int pc = getPC();
+            while (t) {
+                n = *(int *) t; /* next value */
+                *(int *) t = pc;
+                t = n;
+            }
+        }
+
+        virtual int finishCompile() {
+            size_t pagesize = 4096;
+            size_t base = (size_t) getBase() & ~ (pagesize - 1);
+            size_t top =  ((size_t) getPC() + pagesize - 1) & ~ (pagesize - 1);
+            int err = mprotect((void*) base, top - base, PROT_READ | PROT_WRITE | PROT_EXEC);
+            if (err) {
+               error("mprotect() failed: %d", errno);
+            }
+            return err;
+        }
+
+        /**
+         * Alignment (in bytes) for this type of data
+         */
+        virtual size_t alignmentOf(Type* pType){
+            switch (pType->tag) {
+            case TY_CHAR:
+                return 1;
+            case TY_SHORT:
+                return 2;
+            case TY_ARRAY:
+                return alignmentOf(pType->pHead);
+            case TY_STRUCT:
+                return pType->pHead->alignment & 0x7fffffff;
+            case TY_FUNC:
+                error("alignment of func not supported");
+                return 1;
+            default:
+                return 4;
+            }
+        }
+
+        /**
+         * Array element alignment (in bytes) for this type of data.
+         */
+        virtual size_t sizeOf(Type* pType){
+            switch(pType->tag) {
+                case TY_INT:
+                    return 4;
+                case TY_SHORT:
+                    return 2;
+                case TY_CHAR:
+                    return 1;
+                case TY_FLOAT:
+                    return 4;
+                case TY_DOUBLE:
+                    return 8;
+                case TY_POINTER:
+                    return 4;
+                case TY_ARRAY:
+                    return pType->length * sizeOf(pType->pHead);
+                case TY_STRUCT:
+                    return pType->pHead->length;
+                default:
+                    error("Unsupported type %d", pType->tag);
+                    return 0;
+            }
+        }
+
+    private:
+
+        /** Output 1 to 4 bytes.
+         *
+         */
+        void o(int n) {
+            /* cannot use unsigned, so we must do a hack */
+            while (n && n != -1) {
+                ob(n & 0xff);
+                n = n >> 8;
+            }
+        }
+
+        /* Output exactly 2 bytes
+         */
+        void o2(int n) {
+            ob(n & 0xff);
+            ob(0xff & (n >> 8));
+        }
+
+        /* psym is used to put an instruction with a data field which is a
+         reference to a symbol. It is in fact the same as oad ! */
+        int psym(int n, int t) {
+            return oad(n, t);
+        }
+
+        /* instruction + address */
+        int oad(int n, int t) {
+            o(n);
+            int result = getPC();
+            o4(t);
+            return result;
+        }
+
+        static const int operatorHelper[];
+
+        int decodeOp(int op) {
+            if (op < 0 || op > OP_COUNT) {
+                error("Out-of-range operator: %d\n", op);
+                op = 0;
+            }
+            return operatorHelper[op];
+        }
+
+        void gmov(int l, int t) {
+            o(l + 0x83);
+            oad((t > -LOCAL && t < LOCAL) << 7 | 5, t);
+        }
+
+        void setupFloatOperands() {
+            Type* pR0Type = getR0Type();
+            Type* pTOSType = getTOSType();
+            TypeTag tagR0 = pR0Type->tag;
+            TypeTag tagTOS = pTOSType->tag;
+            bool isFloatR0 = isFloatTag(tagR0);
+            bool isFloatTOS = isFloatTag(tagTOS);
+            if (! isFloatR0) {
+                // Convert R0 from int to float
+                o(0x50);      // push %eax
+                o(0x2404DB);  // fildl 0(%esp)
+                o(0x58);      // pop %eax
+            }
+            if (! isFloatTOS){
+                o(0x2404DB);  // fildl 0(%esp);
+                o(0x58);      // pop %eax
+            } else {
+                if (tagTOS == TY_FLOAT) {
+                    o(0x2404d9);  // flds (%esp)
+                    o(0x58);      // pop %eax
+                } else {
+                    o(0x2404dd);  // fldl (%esp)
+                    o(0x58);      // pop %eax
+                    o(0x58);      // pop %eax
+                }
+            }
+            popType();
+        }
+    };
+
+#endif // PROVIDE_X86_CODEGEN
+
+#ifdef PROVIDE_TRACE_CODEGEN
+    class TraceCodeGenerator : public CodeGenerator {
+    private:
+        CodeGenerator* mpBase;
+
+    public:
+        TraceCodeGenerator(CodeGenerator* pBase) {
+            mpBase = pBase;
+        }
+
+        virtual ~TraceCodeGenerator() {
+            delete mpBase;
+        }
+
+        virtual void init(ICodeBuf* pCodeBuf) {
+            mpBase->init(pCodeBuf);
+        }
+
+        void setErrorSink(ErrorSink* pErrorSink) {
+            mpBase->setErrorSink(pErrorSink);
+        }
+
+        /* returns address to patch with local variable size
+        */
+        virtual int functionEntry(Type* pDecl) {
+            int result = mpBase->functionEntry(pDecl);
+            fprintf(stderr, "functionEntry(pDecl) -> %d\n", result);
+            return result;
+        }
+
+        virtual void functionExit(Type* pDecl, int localVariableAddress, int localVariableSize) {
+            fprintf(stderr, "functionExit(pDecl, %d, %d)\n",
+                    localVariableAddress, localVariableSize);
+            mpBase->functionExit(pDecl, localVariableAddress, localVariableSize);
+        }
+
+        /* load immediate value */
+        virtual void li(int t) {
+            fprintf(stderr, "li(%d)\n", t);
+            mpBase->li(t);
+        }
+
+        virtual void loadFloat(int address, Type* pType) {
+            fprintf(stderr, "loadFloat(%d, type=%d)\n", address, pType->tag);
+            mpBase->loadFloat(address, pType);
+        }
+
+        virtual void addStructOffsetR0(int offset, Type* pType) {
+            fprintf(stderr, "addStructOffsetR0(%d, type=%d)\n", offset, pType->tag);
+            mpBase->addStructOffsetR0(offset, pType);
+        }
+
+        virtual int gjmp(int t) {
+            int result = mpBase->gjmp(t);
+            fprintf(stderr, "gjmp(%d) = %d\n", t, result);
+            return result;
+        }
+
+        /* l = 0: je, l == 1: jne */
+        virtual int gtst(bool l, int t) {
+            int result = mpBase->gtst(l, t);
+            fprintf(stderr, "gtst(%d,%d) = %d\n", l, t, result);
+            return result;
+        }
+
+        virtual void gcmp(int op) {
+            fprintf(stderr, "gcmp(%d)\n", op);
+            mpBase->gcmp(op);
+        }
+
+        virtual void genOp(int op) {
+            fprintf(stderr, "genOp(%d)\n", op);
+            mpBase->genOp(op);
+        }
+
+
+        virtual void gUnaryCmp(int op) {
+            fprintf(stderr, "gUnaryCmp(%d)\n", op);
+            mpBase->gUnaryCmp(op);
+        }
+
+        virtual void genUnaryOp(int op) {
+            fprintf(stderr, "genUnaryOp(%d)\n", op);
+            mpBase->genUnaryOp(op);
+        }
+
+        virtual void pushR0() {
+            fprintf(stderr, "pushR0()\n");
+            mpBase->pushR0();
+        }
+
+        virtual void over() {
+            fprintf(stderr, "over()\n");
+            mpBase->over();
+        }
+
+        virtual void popR0() {
+            fprintf(stderr, "popR0()\n");
+            mpBase->popR0();
+        }
+
+        virtual void storeR0ToTOS() {
+            fprintf(stderr, "storeR0ToTOS()\n");
+            mpBase->storeR0ToTOS();
+        }
+
+        virtual void loadR0FromR0() {
+            fprintf(stderr, "loadR0FromR0()\n");
+            mpBase->loadR0FromR0();
+        }
+
+        virtual void leaR0(int ea, Type* pPointerType, ExpressionType et) {
+            fprintf(stderr, "leaR0(%d, %d, %d)\n", ea,
+                    pPointerType->pHead->tag, et);
+            mpBase->leaR0(ea, pPointerType, et);
+        }
+
+        virtual int leaForward(int ea, Type* pPointerType) {
+            fprintf(stderr, "leaForward(%d)\n", ea);
+            return mpBase->leaForward(ea, pPointerType);
+        }
+
+        virtual void convertR0Imp(Type* pType, bool isCast){
+            fprintf(stderr, "convertR0(pType tag=%d, %d)\n",  pType->tag, isCast);
+            mpBase->convertR0Imp(pType, isCast);
+        }
+
+        virtual int beginFunctionCallArguments() {
+            int result = mpBase->beginFunctionCallArguments();
+            fprintf(stderr, "beginFunctionCallArguments() = %d\n", result);
+            return result;
+        }
+
+        virtual size_t storeR0ToArg(int l, Type* pArgType) {
+            fprintf(stderr, "storeR0ToArg(%d, pArgType=%d)\n", l,
+                    pArgType->tag);
+            return mpBase->storeR0ToArg(l, pArgType);
+        }
+
+        virtual void endFunctionCallArguments(Type* pDecl, int a, int l) {
+            fprintf(stderr, "endFunctionCallArguments(%d, %d)\n", a, l);
+            mpBase->endFunctionCallArguments(pDecl, a, l);
+        }
+
+        virtual int callForward(int symbol, Type* pFunc) {
+            int result = mpBase->callForward(symbol, pFunc);
+            fprintf(stderr, "callForward(%d) = %d\n", symbol, result);
+            return result;
+        }
+
+        virtual void callIndirect(int l, Type* pFunc) {
+            fprintf(stderr, "callIndirect(%d returntype = %d)\n", l,
+                    pFunc->pHead->tag);
+            mpBase->callIndirect(l, pFunc);
+        }
+
+        virtual void adjustStackAfterCall(Type* pDecl, int l, bool isIndirect) {
+            fprintf(stderr, "adjustStackAfterCall(pType, %d, %d)\n", l, isIndirect);
+            mpBase->adjustStackAfterCall(pDecl, l, isIndirect);
+        }
+
+        virtual int jumpOffset() {
+            return mpBase->jumpOffset();
+        }
+
+        /* output a symbol and patch all calls to it */
+        virtual void gsym(int t) {
+            fprintf(stderr, "gsym(%d)\n", t);
+            mpBase->gsym(t);
+        }
+
+        virtual void resolveForward(int t) {
+            mpBase->resolveForward(t);
+        }
+
+        virtual int finishCompile() {
+            int result = mpBase->finishCompile();
+            fprintf(stderr, "finishCompile() = %d\n", result);
+            return result;
+        }
+
+        /**
+         * Alignment (in bytes) for this type of data
+         */
+        virtual size_t alignmentOf(Type* pType){
+            return mpBase->alignmentOf(pType);
+        }
+
+        /**
+         * Array element alignment (in bytes) for this type of data.
+         */
+        virtual size_t sizeOf(Type* pType){
+            return mpBase->sizeOf(pType);
+        }
+
+        virtual Type* getR0Type() {
+            return mpBase->getR0Type();
+        }
+
+        virtual ExpressionType getR0ExpressionType() {
+            return mpBase->getR0ExpressionType();
+        }
+
+        virtual void setR0ExpressionType(ExpressionType et) {
+            mpBase->setR0ExpressionType(et);
+        }
+
+        virtual size_t getExpressionStackDepth() {
+            return mpBase->getExpressionStackDepth();
+        }
+
+        virtual void forceR0RVal() {
+            return mpBase->forceR0RVal();
+        }
+    };
+
+#endif // PROVIDE_TRACE_CODEGEN
+
+    class Arena {
+    public:
+        // Used to record a given allocation amount.
+        // Used:
+        // Mark mark = arena.mark();
+        // ... lots of arena.allocate()
+        // arena.free(mark);
+
+        struct Mark {
+            size_t chunk;
+            size_t offset;
+        };
+
+        Arena() {
+            mCurrentChunk = 0;
+            Chunk start(CHUNK_SIZE);
+            mData.push_back(start);
+        }
+
+        ~Arena() {
+            for(size_t i = 0; i < mData.size(); i++) {
+                mData[i].free();
+            }
+        }
+
+        // Alloc using the standard alignment size safe for any variable
+        void* alloc(size_t size) {
+            return alloc(size, 8);
+        }
+
+        Mark mark(){
+            Mark result;
+            result.chunk = mCurrentChunk;
+            result.offset = mData[mCurrentChunk].mOffset;
+            return result;
+        }
+
+        void freeToMark(const Mark& mark) {
+            mCurrentChunk = mark.chunk;
+            mData[mCurrentChunk].mOffset = mark.offset;
+        }
+
+    private:
+        // Allocate memory aligned to a given size
+        // and a given power-of-two-sized alignment (e.g. 1,2,4,8,...)
+        // Memory is not zero filled.
+
+        void* alloc(size_t size, size_t alignment) {
+            while (size > mData[mCurrentChunk].remainingCapacity(alignment)) {
+                if (mCurrentChunk + 1 < mData.size()) {
+                    mCurrentChunk++;
+                } else {
+                    size_t allocSize = CHUNK_SIZE;
+                    if (allocSize < size + alignment - 1) {
+                        allocSize = size + alignment - 1;
+                    }
+                    Chunk chunk(allocSize);
+                    mData.push_back(chunk);
+                    mCurrentChunk++;
+                }
+            }
+            return mData[mCurrentChunk].allocate(size, alignment);
+        }
+
+        static const size_t CHUNK_SIZE = 128*1024;
+        // Note: this class does not deallocate its
+        // memory when it's destroyed. It depends upon
+        // its parent to deallocate the memory.
+        struct Chunk {
+            Chunk() {
+                mpData = 0;
+                mSize = 0;
+                mOffset = 0;
+            }
+
+            Chunk(size_t size) {
+                mSize = size;
+                mpData = (char*) malloc(size);
+                mOffset = 0;
+            }
+
+            ~Chunk() {
+                // Doesn't deallocate memory.
+            }
+
+            void* allocate(size_t size, size_t alignment) {
+                size_t alignedOffset = aligned(mOffset, alignment);
+                void* result = mpData + alignedOffset;
+                mOffset = alignedOffset + size;
+                return result;
+            }
+
+            void free() {
+                if (mpData) {
+                    ::free(mpData);
+                    mpData = 0;
+                }
+            }
+
+            size_t remainingCapacity(size_t alignment) {
+                return aligned(mSize, alignment) - aligned(mOffset, alignment);
+            }
+
+            // Assume alignment is a power of two
+            inline size_t aligned(size_t v, size_t alignment) {
+                size_t mask = alignment-1;
+                return (v + mask) & ~mask;
+            }
+
+            char* mpData;
+            size_t mSize;
+            size_t mOffset;
+        };
+
+        size_t mCurrentChunk;
+
+        Vector<Chunk> mData;
+    };
+
+    struct VariableInfo;
+
+    struct Token {
+        int hash;
+        size_t length;
+        char* pText;
+        tokenid_t id;
+
+        // Current values for the token
+        char* mpMacroDefinition;
+        VariableInfo* mpVariableInfo;
+        VariableInfo* mpStructInfo;
+    };
+
+    class TokenTable {
+    public:
+        // Don't use 0..0xff, allows characters and operators to be tokens too.
+
+        static const int TOKEN_BASE = 0x100;
+        TokenTable() {
+            mpMap = hashmapCreate(128, hashFn, equalsFn);
+        }
+
+        ~TokenTable() {
+            hashmapFree(mpMap);
+        }
+
+        void setArena(Arena* pArena) {
+            mpArena = pArena;
+        }
+
+        // Returns a token for a given string of characters.
+        tokenid_t intern(const char* pText, size_t length) {
+            Token probe;
+            int hash = hashmapHash((void*) pText, length);
+            {
+                Token probe;
+                probe.hash = hash;
+                probe.length = length;
+                probe.pText = (char*) pText;
+                Token* pValue = (Token*) hashmapGet(mpMap, &probe);
+                if (pValue) {
+                    return pValue->id;
+                }
+            }
+
+            Token* pToken = (Token*) mpArena->alloc(sizeof(Token));
+            memset(pToken, 0, sizeof(*pToken));
+            pToken->hash = hash;
+            pToken->length = length;
+            pToken->pText = (char*) mpArena->alloc(length + 1);
+            memcpy(pToken->pText, pText, length);
+            pToken->pText[length] = 0;
+            pToken->id = mTokens.size() + TOKEN_BASE;
+            mTokens.push_back(pToken);
+            hashmapPut(mpMap, pToken, pToken);
+            return pToken->id;
+        }
+
+        // Return the Token for a given tokenid.
+        Token& operator[](tokenid_t id) {
+            return *mTokens[id - TOKEN_BASE];
+        }
+
+        inline size_t size() {
+            return mTokens.size();
+        }
+
+    private:
+
+        static int hashFn(void* pKey) {
+            Token* pToken = (Token*) pKey;
+            return pToken->hash;
+        }
+
+        static bool equalsFn(void* keyA, void* keyB) {
+            Token* pTokenA = (Token*) keyA;
+            Token* pTokenB = (Token*) keyB;
+            // Don't need to compare hash values, they should always be equal
+            return pTokenA->length == pTokenB->length
+                && strcmp(pTokenA->pText, pTokenB->pText) == 0;
+        }
+
+        Hashmap* mpMap;
+        Vector<Token*> mTokens;
+        Arena* mpArena;
+    };
+
+    class InputStream {
+    public:
+        virtual ~InputStream() {}
+        virtual int getChar() = 0;
+    };
+
+    class TextInputStream : public InputStream {
+    public:
+        TextInputStream(const char* text, size_t textLength)
+            : pText(text), mTextLength(textLength), mPosition(0) {
+        }
+
+        virtual int getChar() {
+            return mPosition < mTextLength ? pText[mPosition++] : EOF;
+        }
+
+    private:
+        const char* pText;
+        size_t mTextLength;
+        size_t mPosition;
+    };
+
+    class String {
+    public:
+        String() {
+            mpBase = 0;
+            mUsed = 0;
+            mSize = 0;
+        }
+
+        String(const char* item, int len, bool adopt) {
+            if (len < 0) {
+                len = strlen(item);
+            }
+            if (adopt) {
+                mpBase = (char*) item;
+                mUsed = len;
+                mSize = len + 1;
+            } else {
+                mpBase = 0;
+                mUsed = 0;
+                mSize = 0;
+                appendBytes(item, len);
+            }
+        }
+
+        String(const String& other) {
+            mpBase = 0;
+            mUsed = 0;
+            mSize = 0;
+            appendBytes(other.getUnwrapped(), other.len());
+        }
+
+        ~String() {
+            if (mpBase) {
+                free(mpBase);
+            }
+        }
+
+        String& operator=(const String& other) {
+            clear();
+            appendBytes(other.getUnwrapped(), other.len());
+            return *this;
+        }
+
+        inline char* getUnwrapped() const {
+            return mpBase;
+        }
+
+        void clear() {
+            mUsed = 0;
+            if (mSize > 0) {
+                mpBase[0] = 0;
+            }
+        }
+
+        void appendCStr(const char* s) {
+            appendBytes(s, strlen(s));
+        }
+
+        void appendBytes(const char* s, int n) {
+            memcpy(ensure(n), s, n + 1);
+        }
+
+        void append(char c) {
+            * ensure(1) = c;
+        }
+
+        void append(String& other) {
+            appendBytes(other.getUnwrapped(), other.len());
+        }
+
+        char* orphan() {
+            char* result = mpBase;
+            mpBase = 0;
+            mUsed = 0;
+            mSize = 0;
+            return result;
+        }
+
+        void printf(const char* fmt,...) {
+            va_list ap;
+            va_start(ap, fmt);
+            vprintf(fmt, ap);
+            va_end(ap);
+        }
+
+        void vprintf(const char* fmt, va_list ap) {
+            char* temp;
+            int numChars = vasprintf(&temp, fmt, ap);
+            memcpy(ensure(numChars), temp, numChars+1);
+            free(temp);
+        }
+
+        inline size_t len() const {
+            return mUsed;
+        }
+
+    private:
+        char* ensure(int n) {
+            size_t newUsed = mUsed + n;
+            if (newUsed > mSize) {
+                size_t newSize = mSize * 2 + 10;
+                if (newSize < newUsed) {
+                    newSize = newUsed;
+                }
+                mpBase = (char*) realloc(mpBase, newSize + 1);
+                mSize = newSize;
+            }
+            mpBase[newUsed] = '\0';
+            char* result = mpBase + mUsed;
+            mUsed = newUsed;
+            return result;
+        }
+
+        char* mpBase;
+        size_t mUsed;
+        size_t mSize;
+    };
+
+    void internKeywords() {
+        // Note: order has to match TOK_ constants
+        static const char* keywords[] = {
+            "int",
+            "char",
+            "void",
+            "if",
+            "else",
+            "while",
+            "break",
+            "return",
+            "for",
+            "auto",
+            "case",
+            "const",
+            "continue",
+            "default",
+            "do",
+            "double",
+            "enum",
+            "extern",
+            "float",
+            "goto",
+            "long",
+            "register",
+            "short",
+            "signed",
+            "sizeof",
+            "static",
+            "struct",
+            "switch",
+            "typedef",
+            "union",
+            "unsigned",
+            "volatile",
+            "_Bool",
+            "_Complex",
+            "_Imaginary",
+            "inline",
+            "restrict",
+
+            // predefined tokens that can also be symbols start here:
+            "pragma",
+            "define",
+            "line",
+            0};
+
+        for(int i = 0; keywords[i]; i++) {
+            mTokenTable.intern(keywords[i], strlen(keywords[i]));
+        }
+    }
+
+    struct InputState {
+        InputStream* pStream;
+        int oldCh;
+    };
+
+    struct VariableInfo {
+        void* pAddress;
+        void* pForward; // For a forward direction, linked list of data to fix up
+        tokenid_t tok;
+        size_t level;
+        VariableInfo* pOldDefinition;
+        Type* pType;
+        bool isStructTag;
+    };
+
+    class SymbolStack {
+    public:
+        SymbolStack() {
+            mpArena = 0;
+            mpTokenTable = 0;
+        }
+
+        void setArena(Arena* pArena) {
+            mpArena = pArena;
+        }
+
+        void setTokenTable(TokenTable* pTokenTable) {
+            mpTokenTable = pTokenTable;
+        }
+
+        void pushLevel() {
+            Mark mark;
+            mark.mArenaMark = mpArena->mark();
+            mark.mSymbolHead = mStack.size();
+            mLevelStack.push_back(mark);
+        }
+
+        void popLevel() {
+            // Undo any shadowing that was done:
+            Mark mark = mLevelStack.back();
+            mLevelStack.pop_back();
+            while (mStack.size() > mark.mSymbolHead) {
+                VariableInfo* pV = mStack.back();
+                mStack.pop_back();
+                if (pV->isStructTag) {
+                    (*mpTokenTable)[pV->tok].mpStructInfo = pV->pOldDefinition;
+                } else {
+                    (*mpTokenTable)[pV->tok].mpVariableInfo = pV->pOldDefinition;
+                }
+            }
+            mpArena->freeToMark(mark.mArenaMark);
+        }
+
+        bool isDefinedAtCurrentLevel(tokenid_t tok) {
+            VariableInfo* pV = (*mpTokenTable)[tok].mpVariableInfo;
+            return pV && pV->level == level();
+        }
+
+        bool isStructTagDefinedAtCurrentLevel(tokenid_t tok) {
+            VariableInfo* pV = (*mpTokenTable)[tok].mpStructInfo;
+            return pV && pV->level == level();
+        }
+
+        VariableInfo* add(tokenid_t tok) {
+            Token& token = (*mpTokenTable)[tok];
+            VariableInfo* pOldV = token.mpVariableInfo;
+            VariableInfo* pNewV =
+                (VariableInfo*) mpArena->alloc(sizeof(VariableInfo));
+            memset(pNewV, 0, sizeof(VariableInfo));
+            pNewV->tok = tok;
+            pNewV->level = level();
+            pNewV->pOldDefinition = pOldV;
+            token.mpVariableInfo = pNewV;
+            mStack.push_back(pNewV);
+            return pNewV;
+        }
+
+        VariableInfo* addStructTag(tokenid_t tok) {
+            Token& token = (*mpTokenTable)[tok];
+            VariableInfo* pOldS = token.mpStructInfo;
+            VariableInfo* pNewS =
+                (VariableInfo*) mpArena->alloc(sizeof(VariableInfo));
+            memset(pNewS, 0, sizeof(VariableInfo));
+            pNewS->tok = tok;
+            pNewS->level = level();
+            pNewS->isStructTag = true;
+            pNewS->pOldDefinition = pOldS;
+            token.mpStructInfo = pNewS;
+            mStack.push_back(pNewS);
+            return pNewS;
+        }
+
+        VariableInfo* add(Type* pType) {
+            VariableInfo* pVI = add(pType->id);
+            pVI->pType = pType;
+            return pVI;
+        }
+
+        void forEach(bool (*fn)(VariableInfo*, void*), void* context) {
+            for (size_t i = 0; i < mStack.size(); i++) {
+                if (! fn(mStack[i], context)) {
+                    break;
+                }
+            }
+        }
+
+    private:
+        inline size_t level() {
+            return mLevelStack.size();
+        }
+
+        struct Mark {
+            Arena::Mark mArenaMark;
+            size_t mSymbolHead;
+        };
+
+        Arena* mpArena;
+        TokenTable* mpTokenTable;
+        Vector<VariableInfo*> mStack;
+        Vector<Mark> mLevelStack;
+    };
+
+    int ch; // Current input character, or EOF
+    tokenid_t tok;      // token
+    intptr_t tokc;    // token extra info
+    double tokd;     // floating point constant value
+    int tokl;         // token operator level
+    intptr_t rsym; // return symbol
+    Type* pReturnType; // type of the current function's return.
+    intptr_t loc; // local variable index
+    char* glo;  // global variable index
+    String mTokenString;
+    bool mbSuppressMacroExpansion;
+    char* dptr; // Macro state: Points to macro text during macro playback.
+    int dch;    // Macro state: Saves old value of ch during a macro playback.
+    char* pGlobalBase;
+    ACCSymbolLookupFn mpSymbolLookupFn;
+    void* mpSymbolLookupContext;
+
+    // Arena for the duration of the compile
+    Arena mGlobalArena;
+    // Arena for data that's only needed when compiling a single function
+    Arena mLocalArena;
+
+    Arena* mpCurrentArena;
+
+    TokenTable mTokenTable;
+    SymbolStack mGlobals;
+    SymbolStack mLocals;
+
+    SymbolStack* mpCurrentSymbolStack;
+
+    // Prebuilt types, makes things slightly faster.
+    Type* mkpInt;        // int
+    Type* mkpShort;      // short
+    Type* mkpChar;       // char
+    Type* mkpVoid;       // void
+    Type* mkpFloat;
+    Type* mkpDouble;
+    Type* mkpIntFn;
+    Type* mkpIntPtr;
+    Type* mkpCharPtr;
+    Type* mkpFloatPtr;
+    Type* mkpDoublePtr;
+    Type* mkpPtrIntFn;
+
+    InputStream* file;
+    int mLineNumber;
+    bool mbBumpLine;
+
+    ICodeBuf* pCodeBuf;
+    CodeGenerator* pGen;
+
+    String mErrorBuf;
+
+    String mPragmas;
+    int mPragmaStringCount;
+    int mCompileResult;
+
+    static const int ALLOC_SIZE = 99999;
+
+    static const int TOK_DUMMY = 1;
+    static const int TOK_NUM = 2;
+    static const int TOK_NUM_FLOAT = 3;
+    static const int TOK_NUM_DOUBLE = 4;
+    static const int TOK_OP_ASSIGNMENT = 5;
+    static const int TOK_OP_ARROW = 6;
+
+    // 3..255 are character and/or operators
+
+    // Keywords start at 0x100 and increase by 1
+    // Order has to match string list in "internKeywords".
+    enum {
+        TOK_KEYWORD = TokenTable::TOKEN_BASE,
+        TOK_INT = TOK_KEYWORD,
+        TOK_CHAR,
+        TOK_VOID,
+        TOK_IF,
+        TOK_ELSE,
+        TOK_WHILE,
+        TOK_BREAK,
+        TOK_RETURN,
+        TOK_FOR,
+        TOK_AUTO,
+        TOK_CASE,
+        TOK_CONST,
+        TOK_CONTINUE,
+        TOK_DEFAULT,
+        TOK_DO,
+        TOK_DOUBLE,
+        TOK_ENUM,
+        TOK_EXTERN,
+        TOK_FLOAT,
+        TOK_GOTO,
+        TOK_LONG,
+        TOK_REGISTER,
+        TOK_SHORT,
+        TOK_SIGNED,
+        TOK_SIZEOF,
+        TOK_STATIC,
+        TOK_STRUCT,
+        TOK_SWITCH,
+        TOK_TYPEDEF,
+        TOK_UNION,
+        TOK_UNSIGNED,
+        TOK_VOLATILE,
+        TOK__BOOL,
+        TOK__COMPLEX,
+        TOK__IMAGINARY,
+        TOK_INLINE,
+        TOK_RESTRICT,
+
+        // Symbols start after keywords
+
+        TOK_SYMBOL,
+        TOK_PRAGMA = TOK_SYMBOL,
+        TOK_DEFINE,
+        TOK_LINE
+    };
+
+    static const int LOCAL = 0x200;
+
+    static const int SYM_FORWARD = 0;
+    static const int SYM_DEFINE = 1;
+
+    /* tokens in string heap */
+    static const int TAG_TOK = ' ';
+
+    static const int OP_INCREMENT = 0;
+    static const int OP_DECREMENT = 1;
+    static const int OP_MUL = 2;
+    static const int OP_DIV = 3;
+    static const int OP_MOD = 4;
+    static const int OP_PLUS = 5;
+    static const int OP_MINUS = 6;
+    static const int OP_SHIFT_LEFT = 7;
+    static const int OP_SHIFT_RIGHT = 8;
+    static const int OP_LESS_EQUAL = 9;
+    static const int OP_GREATER_EQUAL = 10;
+    static const int OP_LESS = 11;
+    static const int OP_GREATER = 12;
+    static const int OP_EQUALS = 13;
+    static const int OP_NOT_EQUALS = 14;
+    static const int OP_LOGICAL_AND = 15;
+    static const int OP_LOGICAL_OR = 16;
+    static const int OP_BIT_AND = 17;
+    static const int OP_BIT_XOR = 18;
+    static const int OP_BIT_OR = 19;
+    static const int OP_BIT_NOT = 20;
+    static const int OP_LOGICAL_NOT = 21;
+    static const int OP_COUNT = 22;
+
+    /* Operators are searched from front, the two-character operators appear
+     * before the single-character operators with the same first character.
+     * @ is used to pad out single-character operators.
+     */
+    static const char* operatorChars;
+    static const char operatorLevel[];
+
+    /* Called when we detect an internal problem. Does nothing in production.
+     *
+     */
+    void internalError() {
+        * (char*) 0 = 0;
+    }
+
+    void assertImpl(bool isTrue, int line) {
+        if (!isTrue) {
+            LOGD("%d: assertion failed at line %s:%d.", mLineNumber, __FILE__, line);
+            internalError();
+        }
+    }
+
+    bool isSymbol(tokenid_t t) {
+        return t >= TOK_SYMBOL &&
+            ((size_t) (t-TOK_SYMBOL)) < mTokenTable.size();
+    }
+
+    bool isSymbolOrKeyword(tokenid_t t) {
+        return t >= TOK_KEYWORD &&
+            ((size_t) (t-TOK_KEYWORD)) < mTokenTable.size();
+    }
+
+    VariableInfo* VI(tokenid_t t) {
+        assert(isSymbol(t));
+        VariableInfo* pV = mTokenTable[t].mpVariableInfo;
+        if (pV && pV->tok != t) {
+            internalError();
+        }
+        return pV;
+    }
+
+    inline bool isDefined(tokenid_t t) {
+        return t >= TOK_SYMBOL && VI(t) != 0;
+    }
+
+    const char* nameof(tokenid_t t) {
+        assert(isSymbolOrKeyword(t));
+        return mTokenTable[t].pText;
+    }
+
+    void pdef(int t) {
+        mTokenString.append(t);
+    }
+
+    void inp() {
+        if (dptr) {
+            ch = *dptr++;
+            if (ch == 0) {
+                dptr = 0;
+                ch = dch;
+            }
+        } else {
+            if (mbBumpLine) {
+                mLineNumber++;
+                mbBumpLine = false;
+            }
+            ch = file->getChar();
+            if (ch == '\n') {
+                mbBumpLine = true;
+            }
+        }
+#if 0
+        printf("ch='%c' 0x%x\n", ch, ch);
+#endif
+    }
+
+    int isid() {
+        return isalnum(ch) | (ch == '_');
+    }
+
+    int decodeHex(int c) {
+        if (isdigit(c)) {
+            c -= '0';
+        } else if (c <= 'F') {
+            c = c - 'A' + 10;
+        } else {
+            c =c - 'a' + 10;
+        }
+        return c;
+    }
+
+    /* read a character constant, advances ch to after end of constant */
+    int getq() {
+        int val = ch;
+        if (ch == '\\') {
+            inp();
+            if (isoctal(ch)) {
+                // 1 to 3 octal characters.
+                val = 0;
+                for(int i = 0; i < 3; i++) {
+                    if (isoctal(ch)) {
+                        val = (val << 3) + ch - '0';
+                        inp();
+                    }
+                }
+                return val;
+            } else if (ch == 'x' || ch == 'X') {
+                // N hex chars
+                inp();
+                if (! isxdigit(ch)) {
+                    error("'x' character escape requires at least one digit.");
+                } else {
+                    val = 0;
+                    while (isxdigit(ch)) {
+                        val = (val << 4) + decodeHex(ch);
+                        inp();
+                    }
+                }
+            } else {
+                int val = ch;
+                switch (ch) {
+                    case 'a':
+                        val = '\a';
+                        break;
+                    case 'b':
+                        val = '\b';
+                        break;
+                    case 'f':
+                        val = '\f';
+                        break;
+                    case 'n':
+                        val = '\n';
+                        break;
+                    case 'r':
+                        val = '\r';
+                        break;
+                    case 't':
+                        val = '\t';
+                        break;
+                    case 'v':
+                        val = '\v';
+                        break;
+                    case '\\':
+                        val = '\\';
+                        break;
+                    case '\'':
+                        val = '\'';
+                        break;
+                    case '"':
+                        val = '"';
+                        break;
+                    case '?':
+                        val = '?';
+                        break;
+                    default:
+                        error("Undefined character escape %c", ch);
+                        break;
+                }
+                inp();
+                return val;
+            }
+        } else {
+            inp();
+        }
+        return val;
+    }
+
+    static bool isoctal(int ch) {
+        return ch >= '0' && ch <= '7';
+    }
+
+    bool acceptCh(int c) {
+        bool result = c == ch;
+        if (result) {
+            pdef(ch);
+            inp();
+        }
+        return result;
+    }
+
+    bool acceptDigitsCh() {
+        bool result = false;
+        while (isdigit(ch)) {
+            result = true;
+            pdef(ch);
+            inp();
+        }
+        return result;
+    }
+
+    void parseFloat() {
+        tok = TOK_NUM_DOUBLE;
+        // mTokenString already has the integral part of the number.
+        if(mTokenString.len() == 0) {
+            mTokenString.append('0');
+        }
+        acceptCh('.');
+        acceptDigitsCh();
+        if (acceptCh('e') || acceptCh('E')) {
+            acceptCh('-') || acceptCh('+');
+            acceptDigitsCh();
+        }
+        if (ch == 'f' || ch == 'F') {
+            tok = TOK_NUM_FLOAT;
+            inp();
+        } else if (ch == 'l' || ch == 'L') {
+            inp();
+            error("Long floating point constants not supported.");
+        }
+        char* pText = mTokenString.getUnwrapped();
+        char* pEnd = pText + strlen(pText);
+        char* pEndPtr = 0;
+        errno = 0;
+        if (tok == TOK_NUM_FLOAT) {
+            tokd = strtof(pText, &pEndPtr);
+        } else {
+            tokd = strtod(pText, &pEndPtr);
+        }
+        if (errno || pEndPtr != pEnd) {
+            error("Can't parse constant: %s", pText);
+        }
+        // fprintf(stderr, "float constant: %s (%d) %g\n", pText, tok, tokd);
+    }
+
+    void next() {
+        int l, a;
+
+        while (isspace(ch) | (ch == '#')) {
+            if (ch == '#') {
+                inp();
+                next();
+                if (tok == TOK_DEFINE) {
+                    doDefine();
+                } else if (tok == TOK_PRAGMA) {
+                    doPragma();
+                } else if (tok == TOK_LINE) {
+                    doLine();
+                } else {
+                    error("Unsupported preprocessor directive \"%s\"",
+                          mTokenString.getUnwrapped());
+                }
+            }
+            inp();
+        }
+        tokl = 0;
+        tok = ch;
+        /* encode identifiers & numbers */
+        if (isdigit(ch) || ch == '.') {
+            // Start of a numeric constant. Could be integer, float, or
+            // double, won't know until we look further.
+            mTokenString.clear();
+            pdef(ch);
+            inp();
+            if (tok == '.' && !isdigit(ch)) {
+                goto done;
+            }
+            int base = 10;
+            if (tok == '0') {
+                if (ch == 'x' || ch == 'X') {
+                    base = 16;
+                    tok = TOK_NUM;
+                    tokc = 0;
+                    inp();
+                    while ( isxdigit(ch) ) {
+                        tokc = (tokc << 4) + decodeHex(ch);
+                        inp();
+                    }
+                } else if (isoctal(ch)){
+                    base = 8;
+                    tok = TOK_NUM;
+                    tokc = 0;
+                    while ( isoctal(ch) ) {
+                        tokc = (tokc << 3) + (ch - '0');
+                        inp();
+                    }
+                }
+            } else if (isdigit(tok)){
+                acceptDigitsCh();
+            }
+            if (base == 10) {
+                if (tok == '.' || ch == '.' || ch == 'e' || ch == 'E') {
+                    parseFloat();
+                } else {
+                    // It's an integer constant
+                    char* pText = mTokenString.getUnwrapped();
+                    char* pEnd = pText + strlen(pText);
+                    char* pEndPtr = 0;
+                    errno = 0;
+                    tokc = strtol(pText, &pEndPtr, base);
+                    if (errno || pEndPtr != pEnd) {
+                        error("Can't parse constant: %s %d %d", pText, base, errno);
+                    }
+                    tok = TOK_NUM;
+                }
+            }
+        } else if (isid()) {
+            mTokenString.clear();
+            while (isid()) {
+                pdef(ch);
+                inp();
+            }
+            tok = mTokenTable.intern(mTokenString.getUnwrapped(), mTokenString.len());
+            if (! mbSuppressMacroExpansion) {
+                // Is this a macro?
+                char* pMacroDefinition = mTokenTable[tok].mpMacroDefinition;
+                if (pMacroDefinition) {
+                    // Yes, it is a macro
+                    dptr = pMacroDefinition;
+                    dch = ch;
+                    inp();
+                    next();
+                }
+            }
+        } else {
+            inp();
+            if (tok == '\'') {
+                tok = TOK_NUM;
+                tokc = getq();
+                if (ch != '\'') {
+                    error("Expected a ' character, got %c", ch);
+                } else {
+                  inp();
+                }
+            } else if ((tok == '/') & (ch == '*')) {
+                inp();
+                while (ch && ch != EOF) {
+                    while (ch != '*' && ch != EOF)
+                        inp();
+                    inp();
+                    if (ch == '/')
+                        ch = 0;
+                }
+                if (ch == EOF) {
+                    error("End of file inside comment.");
+                }
+                inp();
+                next();
+            } else if ((tok == '/') & (ch == '/')) {
+                inp();
+                while (ch && (ch != '\n') && (ch != EOF)) {
+                    inp();
+                }
+                inp();
+                next();
+            } else if ((tok == '-') & (ch == '>')) {
+                inp();
+                tok = TOK_OP_ARROW;
+            } else {
+                const char* t = operatorChars;
+                int opIndex = 0;
+                while ((l = *t++) != 0) {
+                    a = *t++;
+                    tokl = operatorLevel[opIndex];
+                    tokc = opIndex;
+                    if ((l == tok) & ((a == ch) | (a == '@'))) {
+#if 0
+                        printf("%c%c -> tokl=%d tokc=0x%x\n",
+                                l, a, tokl, tokc);
+#endif
+                        if (a == ch) {
+                            inp();
+                            tok = TOK_DUMMY; /* dummy token for double tokens */
+                        }
+                        /* check for op=, valid for * / % + - << >> & ^ | */
+                        if (ch == '=' &&
+                                ((tokl >= 1 && tokl <= 3)
+                                        || (tokl >=6 && tokl <= 8)) ) {
+                            inp();
+                            tok = TOK_OP_ASSIGNMENT;
+                        }
+                        break;
+                    }
+                    opIndex++;
+                }
+                if (l == 0) {
+                    tokl = 0;
+                    tokc = 0;
+                }
+            }
+        }
+
+    done: ;
+#if 0
+        {
+            String buf;
+            decodeToken(buf, tok, true);
+            fprintf(stderr, "%s\n", buf.getUnwrapped());
+        }
+#endif
+    }
+
+    void doDefine() {
+        mbSuppressMacroExpansion = true;
+        next();
+        mbSuppressMacroExpansion = false;
+        tokenid_t name = tok;
+        String* pName = new String();
+        if (ch == '(') {
+            delete pName;
+            error("Defines with arguments not supported");
+            return;
+        }
+        while (isspace(ch)) {
+            inp();
+        }
+        String value;
+        bool appendToValue = true;
+        while (ch != '\n' && ch != EOF) {
+            // Check for '//' comments.
+            if (appendToValue && ch == '/') {
+                inp();
+                if (ch == '/') {
+                    appendToValue = false;
+                } else {
+                    value.append('/');
+                }
+            }
+            if (appendToValue && ch != EOF) {
+                value.append(ch);
+            }
+            inp();
+        }
+        char* pDefn = (char*)mGlobalArena.alloc(value.len() + 1);
+        memcpy(pDefn, value.getUnwrapped(), value.len());
+        pDefn[value.len()] = 0;
+        mTokenTable[name].mpMacroDefinition = pDefn;
+    }
+
+    void doPragma() {
+        // # pragma name(val)
+        int state = 0;
+        while(ch != EOF && ch != '\n' && state < 10) {
+            switch(state) {
+                case 0:
+                    if (isspace(ch)) {
+                        inp();
+                    } else {
+                        state++;
+                    }
+                    break;
+                case 1:
+                    if (isalnum(ch)) {
+                        mPragmas.append(ch);
+                        inp();
+                    } else if (ch == '(') {
+                        mPragmas.append(0);
+                        inp();
+                        state++;
+                    } else {
+                        state = 11;
+                    }
+                    break;
+                case 2:
+                    if (isalnum(ch)) {
+                        mPragmas.append(ch);
+                        inp();
+                    } else if (ch == ')') {
+                        mPragmas.append(0);
+                        inp();
+                        state = 10;
+                    } else {
+                        state = 11;
+                    }
+                    break;
+            }
+        }
+        if(state != 10) {
+            error("Unexpected pragma syntax");
+        }
+        mPragmaStringCount += 2;
+    }
+
+    void doLine() {
+        // # line number { "filename "}
+        next();
+        if (tok != TOK_NUM) {
+            error("Expected a line-number");
+        } else {
+            mLineNumber = tokc-1; // The end-of-line will increment it.
+        }
+        while(ch != EOF && ch != '\n') {
+            inp();
+        }
+    }
+
+    virtual void verror(const char* fmt, va_list ap) {
+        mErrorBuf.printf("%ld: ", mLineNumber);
+        mErrorBuf.vprintf(fmt, ap);
+        mErrorBuf.printf("\n");
+    }
+
+    void skip(intptr_t c) {
+        if (!accept(c)) {
+            error("'%c' expected", c);
+        }
+    }
+
+    bool accept(intptr_t c) {
+        if (tok == c) {
+            next();
+            return true;
+        }
+        return false;
+    }
+
+    bool acceptStringLiteral() {
+        if (tok == '"') {
+            pGen->leaR0((int) glo, mkpCharPtr, ET_RVALUE);
+            // This while loop merges multiple adjacent string constants.
+            while (tok == '"') {
+                while (ch != '"' && ch != EOF) {
+                    *allocGlobalSpace(1,1) = getq();
+                }
+                if (ch != '"') {
+                    error("Unterminated string constant.");
+                }
+                inp();
+                next();
+            }
+            /* Null terminate */
+            *glo = 0;
+            /* align heap */
+            allocGlobalSpace(1,(char*) (((intptr_t) glo + 4) & -4) - glo);
+
+            return true;
+        }
+        return false;
+    }
+
+    void linkGlobal(tokenid_t t, bool isFunction) {
+        VariableInfo* pVI = VI(t);
+        void* n = NULL;
+        if (mpSymbolLookupFn) {
+            n = mpSymbolLookupFn(mpSymbolLookupContext, nameof(t));
+        }
+        if (pVI->pType == NULL) {
+            if (isFunction) {
+                pVI->pType = mkpIntFn;
+            } else {
+                pVI->pType = mkpInt;
+            }
+        }
+        pVI->pAddress = n;
+    }
+
+    void unaryOrAssignment() {
+        unary();
+        if (accept('=')) {
+            checkLVal();
+            pGen->pushR0();
+            expr();
+            pGen->forceR0RVal();
+            pGen->storeR0ToTOS();
+        } else if (tok == TOK_OP_ASSIGNMENT) {
+            int t = tokc;
+            next();
+            checkLVal();
+            pGen->pushR0();
+            pGen->forceR0RVal();
+            pGen->pushR0();
+            expr();
+            pGen->forceR0RVal();
+            pGen->genOp(t);
+            pGen->storeR0ToTOS();
+        }
+    }
+
+    /* Parse and evaluate a unary expression.
+     */
+    void unary() {
+        tokenid_t t;
+        intptr_t a;
+        t = 0;
+        if (acceptStringLiteral()) {
+            // Nothing else to do.
+        } else {
+            int c = tokl;
+            a = tokc;
+            double ad = tokd;
+            t = tok;
+            next();
+            if (t == TOK_NUM) {
+                pGen->li(a);
+            } else if (t == TOK_NUM_FLOAT) {
+                // Align to 4-byte boundary
+                glo = (char*) (((intptr_t) glo + 3) & -4);
+                * (float*) glo = (float) ad;
+                pGen->loadFloat((int) glo, mkpFloat);
+                glo += 4;
+            } else if (t == TOK_NUM_DOUBLE) {
+                // Align to 8-byte boundary
+                glo = (char*) (((intptr_t) glo + 7) & -8);
+                * (double*) glo = ad;
+                pGen->loadFloat((int) glo, mkpDouble);
+                glo += 8;
+            } else if (c == 2) {
+                /* -, +, !, ~ */
+                unary();
+                pGen->forceR0RVal();
+                if (t == '!')
+                    pGen->gUnaryCmp(a);
+                else if (t == '+') {
+                    // ignore unary plus.
+                } else {
+                    pGen->genUnaryOp(a);
+                }
+            } else if (c == 11) {
+                // pre increment / pre decrement
+                unary();
+                doIncDec(a == OP_INCREMENT, 0);
+            }
+            else if (t == '(') {
+                // It's either a cast or an expression
+                Type* pCast = acceptCastTypeDeclaration();
+                if (pCast) {
+                    skip(')');
+                    unary();
+                    pGen->forceR0RVal();
+                    pGen->castR0(pCast);
+                } else {
+                    commaExpr();
+                    skip(')');
+                }
+            } else if (t == '*') {
+                /* This is a pointer dereference.
+                 */
+                unary();
+                doPointer();
+            } else if (t == '&') {
+                unary();
+                doAddressOf();
+            } else if (t == EOF ) {
+                error("Unexpected EOF.");
+            } else if (t == ';') {
+                error("Unexpected ';'");
+            } else if (!checkSymbol(t)) {
+                // Don't have to do anything special here, the error
+                // message was printed by checkSymbol() above.
+            } else {
+                if (!isDefined(t)) {
+                    mGlobals.add(t);
+                    // printf("Adding new global function %s\n", nameof(t));
+                }
+                VariableInfo* pVI = VI(t);
+                int n = (intptr_t) pVI->pAddress;
+                /* forward reference: try our lookup function */
+                if (!n) {
+                    linkGlobal(t, tok == '(');
+                    n = (intptr_t) pVI->pAddress;
+                    if (!n && tok != '(') {
+                        error("Undeclared variable %s", nameof(t));
+                    }
+                }
+                if (tok != '(') {
+                    /* variable or function name */
+                    if (!n) {
+                        linkGlobal(t, false);
+                        n = (intptr_t) pVI->pAddress;
+                        if (!n) {
+                            error("Undeclared variable %s", nameof(t));
+                        }
+                    }
+                }
+                // load a variable
+                Type* pVal;
+                ExpressionType et;
+                if (pVI->pType->tag == TY_ARRAY) {
+                    pVal = pVI->pType;
+                    et = ET_RVALUE;
+                } else {
+                    pVal = createPtrType(pVI->pType);
+                    et = ET_LVALUE;
+                }
+                if (n) {
+                    int tag = pVal->pHead->tag;
+                    if (tag == TY_FUNC) {
+                        et = ET_RVALUE;
+                    }
+                    pGen->leaR0(n, pVal, et);
+                } else {
+                    pVI->pForward = (void*) pGen->leaForward(
+                            (int) pVI->pForward, pVal);
+                }
+            }
+        }
+
+        /* Now handle postfix operators */
+        for(;;) {
+            if (tokl == 11) {
+                // post inc / post dec
+                doIncDec(tokc == OP_INCREMENT, true);
+                next();
+            } else if (accept('[')) {
+                // Array reference
+                pGen->forceR0RVal();
+                pGen->pushR0();
+                commaExpr();
+                pGen->forceR0RVal();
+                pGen->genOp(OP_PLUS);
+                doPointer();
+                skip(']');
+            } else if (accept('.')) {
+                // struct element
+                pGen->forceR0RVal();
+                Type* pStruct = pGen->getR0Type();
+                if (pStruct->tag == TY_STRUCT) {
+                    doStructMember(pStruct, true);
+                } else {
+                    error("expected a struct value to the left of '.'");
+                }
+            } else if (accept(TOK_OP_ARROW)) {
+                pGen->forceR0RVal();
+                Type* pPtr = pGen->getR0Type();
+                if (pPtr->tag == TY_POINTER && pPtr->pHead->tag == TY_STRUCT) {
+                    pGen->loadR0FromR0();
+                    doStructMember(pPtr->pHead, false);
+                } else {
+                    error("Expected a pointer to a struct to the left of '->'");
+                }
+            } else  if (accept('(')) {
+                /* function call */
+                Type* pDecl = NULL;
+                VariableInfo* pVI = NULL;
+                Type* pFn = pGen->getR0Type();
+                assert(pFn->tag == TY_POINTER);
+                assert(pFn->pHead->tag == TY_FUNC);
+                pDecl = pFn->pHead;
+                pGen->pushR0();
+                Type* pArgList = pDecl->pTail;
+                bool varArgs = pArgList == NULL;
+                /* push args and invert order */
+                a = pGen->beginFunctionCallArguments();
+                int l = 0;
+                int argCount = 0;
+                while (tok != ')' && tok != EOF) {
+                    if (! varArgs && !pArgList) {
+                        error("Unexpected argument.");
+                    }
+                    expr();
+                    pGen->forceR0RVal();
+                    Type* pTargetType;
+                    if (pArgList) {
+                        pTargetType = pArgList->pHead;
+                        pArgList = pArgList->pTail;
+                    } else {
+                        // This is a ... function, just pass arguments in their
+                        // natural type.
+                        pTargetType = pGen->getR0Type();
+                        if (pTargetType->tag == TY_FLOAT) {
+                            pTargetType = mkpDouble;
+                        } else if (pTargetType->tag == TY_ARRAY) {
+                            // Pass arrays by pointer.
+                            pTargetType = pTargetType->pTail;
+                        }
+                    }
+                    if (pTargetType->tag == TY_VOID) {
+                        error("Can't pass void value for argument %d",
+                              argCount + 1);
+                    } else {
+                        l += pGen->storeR0ToArg(l, pTargetType);
+                    }
+                    if (accept(',')) {
+                        // fine
+                    } else if ( tok != ')') {
+                        error("Expected ',' or ')'");
+                    }
+                    argCount += 1;
+                }
+                if (! varArgs && pArgList) {
+                    error("Expected more argument(s). Saw %d", argCount);
+                }
+                pGen->endFunctionCallArguments(pDecl, a, l);
+                skip(')');
+                pGen->callIndirect(l, pDecl);
+                pGen->adjustStackAfterCall(pDecl, l, true);
+            } else {
+                break;
+            }
+        }
+    }
+
+    void doStructMember(Type* pStruct, bool isDot) {
+        Type* pStructElement = lookupStructMember(pStruct, tok);
+        if (pStructElement) {
+            next();
+            pGen->addStructOffsetR0(pStructElement->length, createPtrType(pStructElement->pHead));
+        } else {
+            String buf;
+            decodeToken(buf, tok, true);
+            error("Expected a struct member to the right of '%s', got %s",
+                    isDot ? "." : "->", buf.getUnwrapped());
+        }
+    }
+
+    void doIncDec(int isInc, int isPost) {
+        // R0 already has the lval
+        checkLVal();
+        int lit = isInc ? 1 : -1;
+        pGen->pushR0();
+        pGen->loadR0FromR0();
+        int tag = pGen->getR0Type()->tag;
+        if (!(tag == TY_INT || tag == TY_SHORT || tag == TY_CHAR ||
+                tag == TY_POINTER)) {
+            error("++/-- illegal for this type. %d", tag);
+        }
+        if (isPost) {
+            pGen->over();
+            pGen->pushR0();
+            pGen->li(lit);
+            pGen->genOp(OP_PLUS);
+            pGen->storeR0ToTOS();
+            pGen->popR0();
+        } else {
+            pGen->pushR0();
+            pGen->li(lit);
+            pGen->genOp(OP_PLUS);
+            pGen->over();
+            pGen->storeR0ToTOS();
+            pGen->popR0();
+        }
+    }
+
+    void doPointer() {
+        pGen->forceR0RVal();
+        Type* pR0Type = pGen->getR0Type();
+        if (pR0Type->tag != TY_POINTER) {
+            error("Expected a pointer type.");
+        } else {
+            if (pR0Type->pHead->tag != TY_FUNC) {
+                pGen->setR0ExpressionType(ET_LVALUE);
+            }
+        }
+    }
+
+    void doAddressOf() {
+        Type* pR0 = pGen->getR0Type();
+        bool isFuncPtr = pR0->tag == TY_POINTER && pR0->pHead->tag == TY_FUNC;
+        if ((! isFuncPtr) && pGen->getR0ExpressionType() != ET_LVALUE) {
+            error("Expected an lvalue");
+        }
+        Type* pR0Type = pGen->getR0Type();
+        pGen->setR0ExpressionType(ET_RVALUE);
+    }
+
+    /* Recursive descent parser for binary operations.
+     */
+    void binaryOp(int level) {
+        intptr_t t, a;
+        t = 0;
+        if (level-- == 1)
+            unaryOrAssignment();
+        else {
+            binaryOp(level);
+            a = 0;
+            while (level == tokl) {
+                t = tokc;
+                next();
+                pGen->forceR0RVal();
+                if (level > 8) {
+                    a = pGen->gtst(t == OP_LOGICAL_OR, a); /* && and || output code generation */
+                    binaryOp(level);
+                } else {
+                    pGen->pushR0();
+                    binaryOp(level);
+                    // Check for syntax error.
+                    if (pGen->getR0Type() == NULL) {
+                        // We failed to parse a right-hand argument.
+                        // Push a dummy value so we don't fail
+                        pGen->li(0);
+                    }
+                    pGen->forceR0RVal();
+                    if ((level == 4) | (level == 5)) {
+                        pGen->gcmp(t);
+                    } else {
+                        pGen->genOp(t);
+                    }
+                }
+            }
+            /* && and || output code generation */
+            if (a && level > 8) {
+                pGen->forceR0RVal();
+                a = pGen->gtst(t == OP_LOGICAL_OR, a);
+                pGen->li(t != OP_LOGICAL_OR);
+                int b = pGen->gjmp(0);
+                pGen->gsym(a);
+                pGen->li(t == OP_LOGICAL_OR);
+                pGen->gsym(b);
+            }
+        }
+    }
+
+    void commaExpr() {
+        for(;;) {
+            expr();
+            if (!accept(',')) {
+                break;
+            }
+        }
+    }
+
+    void expr() {
+        binaryOp(11);
+    }
+
+    int test_expr() {
+        commaExpr();
+        pGen->forceR0RVal();
+        return pGen->gtst(0, 0);
+    }
+
+    void block(intptr_t l, bool outermostFunctionBlock) {
+        intptr_t a, n, t;
+
+        Type* pBaseType;
+        if ((pBaseType = acceptPrimitiveType())) {
+            /* declarations */
+            localDeclarations(pBaseType);
+        } else if (tok == TOK_IF) {
+            next();
+            skip('(');
+            a = test_expr();
+            skip(')');
+            block(l, false);
+            if (tok == TOK_ELSE) {
+                next();
+                n = pGen->gjmp(0); /* jmp */
+                pGen->gsym(a);
+                block(l, false);
+                pGen->gsym(n); /* patch else jmp */
+            } else {
+                pGen->gsym(a); /* patch if test */
+            }
+        } else if ((tok == TOK_WHILE) | (tok == TOK_FOR)) {
+            t = tok;
+            next();
+            skip('(');
+            if (t == TOK_WHILE) {
+                n = pCodeBuf->getPC(); // top of loop, target of "next" iteration
+                a = test_expr();
+            } else {
+                if (tok != ';')
+                    commaExpr();
+                skip(';');
+                n = pCodeBuf->getPC();
+                a = 0;
+                if (tok != ';')
+                    a = test_expr();
+                skip(';');
+                if (tok != ')') {
+                    t = pGen->gjmp(0);
+                    commaExpr();
+                    pGen->gjmp(n - pCodeBuf->getPC() - pGen->jumpOffset());
+                    pGen->gsym(t);
+                    n = t + 4;
+                }
+            }
+            skip(')');
+            block((intptr_t) &a, false);
+            pGen->gjmp(n - pCodeBuf->getPC() - pGen->jumpOffset()); /* jmp */
+            pGen->gsym(a);
+        } else if (tok == '{') {
+            if (! outermostFunctionBlock) {
+                mLocals.pushLevel();
+            }
+            next();
+            while (tok != '}' && tok != EOF)
+                block(l, false);
+            skip('}');
+            if (! outermostFunctionBlock) {
+                mLocals.popLevel();
+            }
+        } else {
+            if (accept(TOK_RETURN)) {
+                if (tok != ';') {
+                    commaExpr();
+                    pGen->forceR0RVal();
+                    if (pReturnType->tag == TY_VOID) {
+                        error("Must not return a value from a void function");
+                    } else {
+                        pGen->convertR0(pReturnType);
+                    }
+                } else {
+                    if (pReturnType->tag != TY_VOID) {
+                        error("Must specify a value here");
+                    }
+                }
+                rsym = pGen->gjmp(rsym); /* jmp */
+            } else if (accept(TOK_BREAK)) {
+                *(int *) l = pGen->gjmp(*(int *) l);
+            } else if (tok != ';')
+                commaExpr();
+            skip(';');
+        }
+    }
+
+    static bool typeEqual(Type* a, Type* b) {
+        if (a == b) {
+            return true;
+        }
+        if (a == NULL || b == NULL) {
+            return false;
+        }
+        TypeTag at = a->tag;
+        if (at != b->tag) {
+            return false;
+        }
+        if (at == TY_POINTER) {
+            return typeEqual(a->pHead, b->pHead);
+        } else if (at == TY_ARRAY) {
+            return a->length == b->length && typeEqual(a->pHead, b->pHead);
+        } else if (at == TY_FUNC || at == TY_PARAM) {
+            return typeEqual(a->pHead, b->pHead)
+                && typeEqual(a->pTail, b->pTail);
+        } else if (at == TY_STRUCT) {
+            return a->pHead == b->pHead;
+        }
+        return true;
+    }
+
+    Type* createType(TypeTag tag, Type* pHead, Type* pTail) {
+        assert(tag >= TY_INT && tag <= TY_PARAM);
+        Type* pType = (Type*) mpCurrentArena->alloc(sizeof(Type));
+        memset(pType, 0, sizeof(*pType));
+        pType->tag = tag;
+        pType->pHead = pHead;
+        pType->pTail = pTail;
+        return pType;
+    }
+
+    Type* createPtrType(Type* pType) {
+        return createType(TY_POINTER, pType, NULL);
+    }
+
+    /**
+     * Try to print a type in declaration order
+     */
+    void decodeType(String& buffer, Type* pType) {
+        buffer.clear();
+        if (pType == NULL) {
+            buffer.appendCStr("null");
+            return;
+        }
+        decodeTypeImp(buffer, pType);
+    }
+
+    void decodeTypeImp(String& buffer, Type* pType) {
+        decodeTypeImpPrefix(buffer, pType);
+        decodeId(buffer, pType->id);
+        decodeTypeImpPostfix(buffer, pType);
+    }
+
+    void decodeId(String& buffer, tokenid_t id) {
+        if (id) {
+            String temp;
+            decodeToken(temp, id, false);
+            buffer.append(temp);
+        }
+    }
+
+    void decodeTypeImpPrefix(String& buffer, Type* pType) {
+        TypeTag tag = pType->tag;
+
+        if ((tag >= TY_INT && tag <= TY_DOUBLE) || tag == TY_STRUCT) {
+            switch (tag) {
+                case TY_INT:
+                    buffer.appendCStr("int");
+                    break;
+                case TY_SHORT:
+                    buffer.appendCStr("short");
+                    break;
+                case TY_CHAR:
+                    buffer.appendCStr("char");
+                    break;
+                case TY_VOID:
+                    buffer.appendCStr("void");
+                    break;
+                case TY_FLOAT:
+                    buffer.appendCStr("float");
+                    break;
+                case TY_DOUBLE:
+                    buffer.appendCStr("double");
+                    break;
+                case TY_STRUCT:
+                {
+                    bool isStruct = (pType->pHead->alignment & 0x80000000) != 0;
+                    buffer.appendCStr(isStruct ? "struct" : "union");
+                    if (pType->pHead && pType->pHead->structTag) {
+                        buffer.append(' ');
+                        decodeId(buffer, pType->pHead->structTag);
+                    }
+                }
+                    break;
+                default:
+                    break;
+            }
+            buffer.append(' ');
+        }
+
+        switch (tag) {
+            case TY_INT:
+                break;
+            case TY_SHORT:
+                break;
+            case TY_CHAR:
+                break;
+            case TY_VOID:
+                 break;
+            case TY_FLOAT:
+                 break;
+            case TY_DOUBLE:
+                break;
+            case TY_POINTER:
+                decodeTypeImpPrefix(buffer, pType->pHead);
+                if(pType->pHead && pType->pHead->tag == TY_FUNC) {
+                    buffer.append('(');
+                }
+                buffer.append('*');
+                break;
+            case TY_ARRAY:
+                decodeTypeImpPrefix(buffer, pType->pHead);
+                break;
+            case TY_STRUCT:
+                break;
+            case TY_FUNC:
+                decodeTypeImp(buffer, pType->pHead);
+                break;
+            case TY_PARAM:
+                decodeTypeImp(buffer, pType->pHead);
+                break;
+            default:
+                String temp;
+                temp.printf("Unknown tag %d", pType->tag);
+                buffer.append(temp);
+                break;
+        }
+    }
+
+    void decodeTypeImpPostfix(String& buffer, Type* pType) {
+        TypeTag tag = pType->tag;
+
+        switch(tag) {
+            case TY_POINTER:
+                if(pType->pHead && pType->pHead->tag == TY_FUNC) {
+                    buffer.append(')');
+                }
+                decodeTypeImpPostfix(buffer, pType->pHead);
+                break;
+            case TY_ARRAY:
+                {
+                    String temp;
+                    temp.printf("[%d]", pType->length);
+                    buffer.append(temp);
+                }
+                break;
+            case TY_STRUCT:
+                if (pType->pHead->length >= 0) {
+                    buffer.appendCStr(" {");
+                    for(Type* pArg = pType->pTail; pArg; pArg = pArg->pTail) {
+                        decodeTypeImp(buffer, pArg->pHead);
+                        buffer.appendCStr(";");
+                    }
+                    buffer.append('}');
+                }
+                break;
+            case TY_FUNC:
+                buffer.append('(');
+                for(Type* pArg = pType->pTail; pArg; pArg = pArg->pTail) {
+                    decodeTypeImp(buffer, pArg);
+                    if (pArg->pTail) {
+                        buffer.appendCStr(", ");
+                    }
+                }
+                buffer.append(')');
+                break;
+            default:
+                break;
+        }
+    }
+
+    void printType(Type* pType) {
+        String buffer;
+        decodeType(buffer, pType);
+        fprintf(stderr, "%s\n", buffer.getUnwrapped());
+    }
+
+    Type* acceptPrimitiveType() {
+        Type* pType;
+        if (tok == TOK_INT) {
+            pType = mkpInt;
+        } else if (tok == TOK_SHORT) {
+            pType = mkpShort;
+        } else if (tok == TOK_CHAR) {
+            pType = mkpChar;
+        } else if (tok == TOK_VOID) {
+            pType = mkpVoid;
+        } else if (tok == TOK_FLOAT) {
+            pType = mkpFloat;
+        } else if (tok == TOK_DOUBLE) {
+            pType = mkpDouble;
+        } else if (tok == TOK_STRUCT || tok == TOK_UNION) {
+            return acceptStruct();
+        } else {
+            return NULL;
+        }
+        next();
+        return pType;
+    }
+
+    Type* acceptStruct() {
+        assert(tok == TOK_STRUCT || tok == TOK_UNION);
+        bool isStruct = tok == TOK_STRUCT;
+        next();
+        tokenid_t structTag = acceptSymbol();
+        bool isDeclaration = accept('{');
+        bool fail = false;
+
+        Type* pStructType = createType(TY_STRUCT, NULL, NULL);
+        if (structTag) {
+            Token* pToken = &mTokenTable[structTag];
+            VariableInfo* pStructInfo = pToken->mpStructInfo;
+            bool needToDeclare = !pStructInfo;
+            if (pStructInfo) {
+                if (isDeclaration) {
+                    if (mpCurrentSymbolStack->isStructTagDefinedAtCurrentLevel(structTag)) {
+                        if (pStructInfo->pType->pHead->length == -1) {
+                            // we're filling in a forward declaration.
+                            needToDeclare = false;
+                        } else {
+                            error("A struct with the same name is already defined at this level.");
+                            fail = true;
+                        }
+                    } else {
+                        needToDeclare = true;
+                    }
+                }
+                if (!fail) {
+                     assert(pStructInfo->isStructTag);
+                     pStructType->pHead = pStructInfo->pType;
+                     pStructType->pTail = pStructType->pHead->pTail;
+                }
+            }
+
+            if (needToDeclare) {
+                // This is a new struct name
+                pToken->mpStructInfo = mpCurrentSymbolStack->addStructTag(structTag);
+                pStructType = createType(TY_STRUCT, NULL, NULL);
+                pStructType->structTag = structTag;
+                pStructType->pHead = pStructType;
+                if (! isDeclaration) {
+                    // A forward declaration
+                    pStructType->length = -1;
+                }
+                pToken->mpStructInfo->pType = pStructType;
+            }
+        } else {
+            // An anonymous struct
+            pStructType->pHead = pStructType;
+        }
+
+        if (isDeclaration) {
+            size_t offset = 0;
+            size_t structSize = 0;
+            size_t structAlignment = 0;
+            Type** pParamHolder = & pStructType->pHead->pTail;
+            while (tok != '}' && tok != EOF) {
+                Type* pPrimitiveType = expectPrimitiveType();
+                if (pPrimitiveType) {
+                    while (tok != ';' && tok != EOF) {
+                        Type* pItem = acceptDeclaration(pPrimitiveType, true, false);
+                        if (!pItem) {
+                            break;
+                        }
+                        if (lookupStructMember(pStructType, pItem->id)) {
+                            String buf;
+                            decodeToken(buf, pItem->id, false);
+                            error("Duplicate struct member %s", buf.getUnwrapped());
+                        }
+                        Type* pStructElement = createType(TY_PARAM, pItem, NULL);
+                        size_t alignment = pGen->alignmentOf(pItem);
+                        if (alignment > structAlignment) {
+                            structAlignment = alignment;
+                        }
+                        size_t alignmentMask = alignment - 1;
+                        offset = (offset + alignmentMask) & ~alignmentMask;
+                        pStructElement->length = offset;
+                        size_t size = pGen->sizeOf(pItem);
+                        if (isStruct) {
+                            offset += size;
+                            structSize = offset;
+                        } else {
+                            if (size >= structSize) {
+                                structSize = size;
+                            }
+                        }
+                        *pParamHolder = pStructElement;
+                        pParamHolder = &pStructElement->pTail;
+                        accept(',');
+                    }
+                    skip(';');
+                } else {
+                    // Some sort of syntax error, skip token and keep trying
+                    next();
+                }
+            }
+            if (!fail) {
+                pStructType->pHead->length = structSize;
+                pStructType->pHead->alignment = structAlignment | (isStruct << 31);
+            }
+            skip('}');
+        }
+        if (fail) {
+            pStructType = NULL;
+        }
+        return pStructType;
+    }
+
+    Type* lookupStructMember(Type* pStruct, tokenid_t memberId) {
+        for(Type* pStructElement = pStruct->pHead->pTail; pStructElement; pStructElement = pStructElement->pTail) {
+            if (pStructElement->pHead->id == memberId) {
+                return pStructElement;
+            }
+        }
+        return NULL;
+    }
+
+    Type* acceptDeclaration(Type* pType, bool nameAllowed, bool nameRequired) {
+        tokenid_t declName = 0;
+        bool reportFailure = false;
+        pType = acceptDecl2(pType, declName, nameAllowed,
+                                  nameRequired, reportFailure);
+        if (declName) {
+            // Clone the parent type so we can set a unique ID
+            Type* pOldType = pType;
+            pType = createType(pType->tag, pType->pHead, pType->pTail);
+            *pType = *pOldType;
+            pType->id = declName;
+        } else if (nameRequired) {
+            error("Expected a variable name");
+        }
+#if 0
+        fprintf(stderr, "Parsed a declaration:       ");
+        printType(pType);
+#endif
+        if (reportFailure) {
+            return NULL;
+        }
+        return pType;
+    }
+
+    Type* expectDeclaration(Type* pBaseType) {
+        bool nameRequired = pBaseType->tag != TY_STRUCT;
+        Type* pType = acceptDeclaration(pBaseType, true, nameRequired);
+        if (! pType) {
+            error("Expected a declaration");
+        }
+        return pType;
+    }
+
+    /* Used for accepting types that appear in casts */
+    Type* acceptCastTypeDeclaration() {
+        Type* pType = acceptPrimitiveType();
+        if (pType) {
+            pType = acceptDeclaration(pType, false, false);
+        }
+        return pType;
+    }
+
+    Type* expectCastTypeDeclaration() {
+        Type* pType = acceptCastTypeDeclaration();
+        if (! pType) {
+            error("Expected a declaration");
+        }
+        return pType;
+    }
+
+    Type* acceptDecl2(Type* pType, tokenid_t& declName,
+                      bool nameAllowed, bool nameRequired,
+                      bool& reportFailure) {
+        while (accept('*')) {
+            pType = createType(TY_POINTER, pType, NULL);
+        }
+        pType = acceptDecl3(pType, declName, nameAllowed, nameRequired,
+                            reportFailure);
+        return pType;
+    }
+
+    Type* acceptDecl3(Type* pType, tokenid_t& declName,
+                      bool nameAllowed, bool nameRequired,
+                      bool& reportFailure) {
+        // direct-dcl :
+        //   name
+        //  (dcl)
+        //   direct-dcl()
+        //   direct-dcl[]
+        Type* pNewHead = NULL;
+        if (accept('(')) {
+            pNewHead = acceptDecl2(pNewHead, declName, nameAllowed,
+                                nameRequired, reportFailure);
+            skip(')');
+        } else if ((declName = acceptSymbol()) != 0) {
+            if (nameAllowed == false && declName) {
+                error("Symbol %s not allowed here", nameof(declName));
+                reportFailure = true;
+            }
+        } else if (nameRequired && ! declName) {
+            String temp;
+            decodeToken(temp, tok, true);
+            error("Expected name. Got %s", temp.getUnwrapped());
+            reportFailure = true;
+        }
+        for(;;) {
+            if (accept('(')) {
+                // Function declaration
+                Type* pTail = acceptArgs(nameAllowed);
+                pType = createType(TY_FUNC, pType, pTail);
+                skip(')');
+            } if (accept('[')) {
+                if (tok != ']') {
+                    if (tok != TOK_NUM || tokc <= 0) {
+                        error("Expected positive integer constant");
+                    } else {
+                        Type* pDecayType = createPtrType(pType);
+                        pType = createType(TY_ARRAY, pType, pDecayType);
+                        pType->length = tokc;
+                    }
+                    next();
+                }
+                skip(']');
+            } else {
+                break;
+            }
+        }
+
+        if (pNewHead) {
+            Type* pA = pNewHead;
+            while (pA->pHead) {
+                pA = pA->pHead;
+            }
+            pA->pHead = pType;
+            pType = pNewHead;
+        }
+        return pType;
+    }
+
+    Type* acceptArgs(bool nameAllowed) {
+        Type* pHead = NULL;
+        Type* pTail = NULL;
+        for(;;) {
+            Type* pBaseArg = acceptPrimitiveType();
+            if (pBaseArg) {
+                Type* pArg = acceptDeclaration(pBaseArg, nameAllowed, false);
+                if (pArg) {
+                    Type* pParam = createType(TY_PARAM, pArg, NULL);
+                    if (!pHead) {
+                        pHead = pParam;
+                        pTail = pParam;
+                    } else {
+                        pTail->pTail = pParam;
+                        pTail = pParam;
+                    }
+                }
+            }
+            if (! accept(',')) {
+                break;
+            }
+        }
+        return pHead;
+    }
+
+    Type* expectPrimitiveType() {
+        Type* pType = acceptPrimitiveType();
+        if (!pType) {
+            String buf;
+            decodeToken(buf, tok, true);
+            error("Expected a type, got %s", buf.getUnwrapped());
+        }
+        return pType;
+    }
+
+    void checkLVal() {
+        if (pGen->getR0ExpressionType() != ET_LVALUE) {
+            error("Expected an lvalue");
+        }
+    }
+
+    void addGlobalSymbol(Type* pDecl) {
+        tokenid_t t = pDecl->id;
+        VariableInfo* pVI = VI(t);
+        if(pVI && pVI->pAddress) {
+            reportDuplicate(t);
+        }
+        mGlobals.add(pDecl);
+    }
+
+    void reportDuplicate(tokenid_t t) {
+        error("Duplicate definition of %s", nameof(t));
+    }
+
+    void addLocalSymbol(Type* pDecl) {
+        tokenid_t t = pDecl->id;
+        if (mLocals.isDefinedAtCurrentLevel(t)) {
+            reportDuplicate(t);
+        }
+        mLocals.add(pDecl);
+    }
+
+    bool checkUndeclaredStruct(Type* pBaseType) {
+        if (pBaseType->tag == TY_STRUCT && pBaseType->length < 0) {
+            String temp;
+            decodeToken(temp, pBaseType->structTag, false);
+            error("Undeclared struct %s", temp.getUnwrapped());
+            return true;
+        }
+        return false;
+    }
+
+    void localDeclarations(Type* pBaseType) {
+        intptr_t a;
+
+        while (pBaseType) {
+            while (tok != ';' && tok != EOF) {
+                Type* pDecl = expectDeclaration(pBaseType);
+                if (!pDecl) {
+                    break;
+                }
+                if (!pDecl->id) {
+                    break;
+                }
+                if (checkUndeclaredStruct(pDecl)) {
+                    break;
+                }
+                addLocalSymbol(pDecl);
+                if (pDecl->tag == TY_FUNC) {
+                    if (tok == '{') {
+                        error("Nested functions are not allowed. Did you forget a '}' ?");
+                        break;
+                    }
+                    // Else it's a forward declaration of a function.
+                } else {
+                    int variableAddress = 0;
+                    size_t alignment = pGen->alignmentOf(pDecl);
+                    assert(alignment > 0);
+                    size_t alignmentMask = ~ (alignment - 1);
+                    size_t sizeOf = pGen->sizeOf(pDecl);
+                    assert(sizeOf > 0);
+                    loc = (loc + alignment - 1) & alignmentMask;
+                    size_t alignedSize = (sizeOf + alignment - 1) & alignmentMask;
+                    loc = loc + alignedSize;
+                    variableAddress = -loc;
+                    VI(pDecl->id)->pAddress = (void*) variableAddress;
+                    if (accept('=')) {
+                        /* assignment */
+                        pGen->leaR0(variableAddress, createPtrType(pDecl), ET_LVALUE);
+                        pGen->pushR0();
+                        expr();
+                        pGen->forceR0RVal();
+                        pGen->storeR0ToTOS();
+                    }
+                }
+                if (tok == ',')
+                    next();
+            }
+            skip(';');
+            pBaseType = acceptPrimitiveType();
+        }
+    }
+
+    bool checkSymbol() {
+        return checkSymbol(tok);
+    }
+
+    void decodeToken(String& buffer, tokenid_t token, bool quote) {
+        if (token == EOF ) {
+            buffer.printf("EOF");
+        } else if (token == TOK_NUM) {
+            buffer.printf("numeric constant");
+        } else if (token >= 0 && token < 256) {
+            if (token < 32) {
+                buffer.printf("'\\x%02x'", token);
+            } else {
+                buffer.printf("'%c'", token);
+            }
+        } else {
+            if (quote) {
+                if (token >= TOK_KEYWORD && token < TOK_SYMBOL) {
+                    buffer.printf("keyword \"%s\"", nameof(token));
+                } else {
+                    buffer.printf("symbol \"%s\"", nameof(token));
+                }
+            } else {
+                buffer.printf("%s", nameof(token));
+            }
+        }
+    }
+
+    void printToken(tokenid_t token) {
+        String buffer;
+        decodeToken(buffer, token, true);
+        fprintf(stderr, "%s\n", buffer.getUnwrapped());
+    }
+
+    bool checkSymbol(tokenid_t token) {
+        bool result = token >= TOK_SYMBOL;
+        if (!result) {
+            String temp;
+            decodeToken(temp, token, true);
+            error("Expected symbol. Got %s", temp.getUnwrapped());
+        }
+        return result;
+    }
+
+    tokenid_t acceptSymbol() {
+        tokenid_t result = 0;
+        if (tok >= TOK_SYMBOL) {
+            result = tok;
+            next();
+        }
+        return result;
+    }
+
+    void globalDeclarations() {
+        mpCurrentSymbolStack = &mGlobals;
+        while (tok != EOF) {
+            Type* pBaseType = expectPrimitiveType();
+            if (!pBaseType) {
+                break;
+            }
+            Type* pDecl = expectDeclaration(pBaseType);
+            if (!pDecl) {
+                break;
+            }
+            if (!pDecl->id) {
+                skip(';');
+                continue;
+            }
+
+            if (checkUndeclaredStruct(pDecl)) {
+                skip(';');
+                continue;
+            }
+
+            if (! isDefined(pDecl->id)) {
+                addGlobalSymbol(pDecl);
+            }
+            VariableInfo* name = VI(pDecl->id);
+            if (name && name->pAddress) {
+                error("Already defined global %s", nameof(pDecl->id));
+            }
+            if (pDecl->tag < TY_FUNC) {
+                // it's a variable declaration
+                for(;;) {
+                    if (name && !name->pAddress) {
+                        name->pAddress = (int*) allocGlobalSpace(
+                                                   pGen->alignmentOf(name->pType),
+                                                   pGen->sizeOf(name->pType));
+                    }
+                    if (accept('=')) {
+                        if (tok == TOK_NUM) {
+                            if (name) {
+                                * (int*) name->pAddress = tokc;
+                            }
+                            next();
+                        } else {
+                            error("Expected an integer constant");
+                        }
+                    }
+                    if (!accept(',')) {
+                        break;
+                    }
+                    pDecl = expectDeclaration(pBaseType);
+                    if (!pDecl) {
+                        break;
+                    }
+                    if (! isDefined(pDecl->id)) {
+                        addGlobalSymbol(pDecl);
+                    }
+                    name = VI(pDecl->id);
+                }
+                skip(';');
+            } else {
+                // Function declaration
+                if (accept(';')) {
+                    // forward declaration.
+                } else if (tok != '{') {
+                    error("expected '{'");
+                } else {
+                    mpCurrentArena = &mLocalArena;
+                    mpCurrentSymbolStack = &mLocals;
+                    if (name) {
+                        /* patch forward references */
+                        pGen->resolveForward((int) name->pForward);
+                        /* put function address */
+                        name->pAddress = (void*) pCodeBuf->getPC();
+                    }
+                    // Calculate stack offsets for parameters
+                    mLocals.pushLevel();
+                    intptr_t a = 8;
+                    int argCount = 0;
+                    for (Type* pP = pDecl->pTail; pP; pP = pP->pTail) {
+                        Type* pArg = pP->pHead;
+                        if (pArg->id) {
+                            addLocalSymbol(pArg);
+                        }
+                        /* read param name and compute offset */
+                        Type* pPassingType = passingType(pArg);
+                        size_t alignment = pGen->alignmentOf(pPassingType);
+                        a = (a + alignment - 1) & ~ (alignment-1);
+                        if (pArg->id) {
+                            VI(pArg->id)->pAddress = (void*) a;
+                        }
+                        a = a + pGen->sizeOf(pPassingType);
+                        argCount++;
+                    }
+                    rsym = loc = 0;
+                    pReturnType = pDecl->pHead;
+                    a = pGen->functionEntry(pDecl);
+                    block(0, true);
+                    pGen->gsym(rsym);
+                    pGen->functionExit(pDecl, a, loc);
+                    mLocals.popLevel();
+                    mpCurrentArena = &mGlobalArena;
+                    mpCurrentSymbolStack = &mGlobals;
+                }
+            }
+        }
+    }
+
+    Type* passingType(Type* pType) {
+        switch (pType->tag) {
+        case TY_CHAR:
+        case TY_SHORT:
+            return mkpInt;
+        default:
+            return pType;
+        }
+    }
+
+    char* allocGlobalSpace(size_t alignment, size_t bytes) {
+        size_t base = (((size_t) glo) + alignment - 1) & ~(alignment-1);
+        size_t end = base + bytes;
+        if ((end - (size_t) pGlobalBase) > (size_t) ALLOC_SIZE) {
+            error("Global space exhausted");
+            assert(false);
+            return NULL;
+        }
+        char* result = (char*) base;
+        glo = (char*) end;
+        return result;
+    }
+
+    void cleanup() {
+        if (pGlobalBase != 0) {
+            free(pGlobalBase);
+            pGlobalBase = 0;
+        }
+        if (pGen) {
+            delete pGen;
+            pGen = 0;
+        }
+        if (pCodeBuf) {
+            delete pCodeBuf;
+            pCodeBuf = 0;
+        }
+        if (file) {
+            delete file;
+            file = 0;
+        }
+    }
+
+    // One-time initialization, when class is constructed.
+    void init() {
+        mpSymbolLookupFn = 0;
+        mpSymbolLookupContext = 0;
+    }
+
+    void clear() {
+        tok = 0;
+        tokc = 0;
+        tokl = 0;
+        ch = 0;
+        rsym = 0;
+        loc = 0;
+        glo = 0;
+        dptr = 0;
+        dch = 0;
+        file = 0;
+        pGlobalBase = 0;
+        pCodeBuf = 0;
+        pGen = 0;
+        mPragmaStringCount = 0;
+        mCompileResult = 0;
+        mLineNumber = 1;
+        mbBumpLine = false;
+        mbSuppressMacroExpansion = false;
+    }
+
+    void setArchitecture(const char* architecture) {
+        delete pGen;
+        pGen = 0;
+
+        delete pCodeBuf;
+        pCodeBuf = new CodeBuf();
+
+        if (architecture != NULL) {
+#ifdef PROVIDE_ARM_CODEGEN
+            if (! pGen && strcmp(architecture, "arm") == 0) {
+                pGen = new ARMCodeGenerator();
+                pCodeBuf = new ARMCodeBuf(pCodeBuf);
+            }
+#endif
+#ifdef PROVIDE_X86_CODEGEN
+            if (! pGen && strcmp(architecture, "x86") == 0) {
+                pGen = new X86CodeGenerator();
+            }
+#endif
+            if (!pGen ) {
+                error("Unknown architecture %s\n", architecture);
+            }
+        }
+
+        if (pGen == NULL) {
+#if defined(DEFAULT_ARM_CODEGEN)
+            pGen = new ARMCodeGenerator();
+            pCodeBuf = new ARMCodeBuf(pCodeBuf);
+#elif defined(DEFAULT_X86_CODEGEN)
+            pGen = new X86CodeGenerator();
+#endif
+        }
+        if (pGen == NULL) {
+            error("No code generator defined.");
+        } else {
+            pGen->setErrorSink(this);
+            pGen->setTypes(mkpInt);
+        }
+    }
+
+public:
+    struct args {
+        args() {
+            architecture = 0;
+        }
+        const char* architecture;
+    };
+
+    Compiler() {
+        init();
+        clear();
+    }
+
+    ~Compiler() {
+        cleanup();
+    }
+
+    void registerSymbolCallback(ACCSymbolLookupFn pFn, ACCvoid* pContext) {
+        mpSymbolLookupFn = pFn;
+        mpSymbolLookupContext = pContext;
+    }
+
+    int compile(const char* text, size_t textLength) {
+        int result;
+
+        mpCurrentArena = &mGlobalArena;
+        createPrimitiveTypes();
+        cleanup();
+        clear();
+        mTokenTable.setArena(&mGlobalArena);
+        mGlobals.setArena(&mGlobalArena);
+        mGlobals.setTokenTable(&mTokenTable);
+        mLocals.setArena(&mLocalArena);
+        mLocals.setTokenTable(&mTokenTable);
+
+        internKeywords();
+        setArchitecture(NULL);
+        if (!pGen) {
+            return -1;
+        }
+#ifdef PROVIDE_TRACE_CODEGEN
+            pGen = new TraceCodeGenerator(pGen);
+#endif
+        pGen->setErrorSink(this);
+
+        if (pCodeBuf) {
+            pCodeBuf->init(ALLOC_SIZE);
+        }
+        pGen->init(pCodeBuf);
+        file = new TextInputStream(text, textLength);
+        pGlobalBase = (char*) calloc(1, ALLOC_SIZE);
+        glo = pGlobalBase;
+        inp();
+        next();
+        globalDeclarations();
+        checkForUndefinedForwardReferences();
+        result = pGen->finishCompile();
+        if (result == 0) {
+            if (mErrorBuf.len()) {
+                result = -2;
+            }
+        }
+        mCompileResult = result;
+        return result;
+    }
+
+    void createPrimitiveTypes() {
+        mkpInt = createType(TY_INT, NULL, NULL);
+        mkpShort = createType(TY_SHORT, NULL, NULL);
+        mkpChar = createType(TY_CHAR, NULL, NULL);
+        mkpVoid = createType(TY_VOID, NULL, NULL);
+        mkpFloat = createType(TY_FLOAT, NULL, NULL);
+        mkpDouble = createType(TY_DOUBLE, NULL, NULL);
+        mkpIntFn =  createType(TY_FUNC, mkpInt, NULL);
+        mkpIntPtr = createPtrType(mkpInt);
+        mkpCharPtr = createPtrType(mkpChar);
+        mkpFloatPtr = createPtrType(mkpFloat);
+        mkpDoublePtr = createPtrType(mkpDouble);
+        mkpPtrIntFn = createPtrType(mkpIntFn);
+    }
+
+    void checkForUndefinedForwardReferences() {
+        mGlobals.forEach(static_ufrcFn, this);
+    }
+
+    static bool static_ufrcFn(VariableInfo* value, void* context) {
+        Compiler* pCompiler = (Compiler*) context;
+        return pCompiler->undefinedForwardReferenceCheck(value);
+    }
+
+    bool undefinedForwardReferenceCheck(VariableInfo* value) {
+        if (!value->pAddress && value->pForward) {
+            error("Undefined forward reference: %s",
+                  mTokenTable[value->tok].pText);
+        }
+        return true;
+    }
+
+    /* Look through the symbol table to find a symbol.
+     * If found, return its value.
+     */
+    void* lookup(const char* name) {
+        if (mCompileResult == 0) {
+            tokenid_t tok = mTokenTable.intern(name, strlen(name));
+            VariableInfo* pVariableInfo = VI(tok);
+            if (pVariableInfo) {
+                return pVariableInfo->pAddress;
+            }
+        }
+        return NULL;
+    }
+
+    void getPragmas(ACCsizei* actualStringCount,
+                    ACCsizei maxStringCount, ACCchar** strings) {
+        int stringCount = mPragmaStringCount;
+        if (actualStringCount) {
+            *actualStringCount = stringCount;
+        }
+        if (stringCount > maxStringCount) {
+            stringCount = maxStringCount;
+        }
+        if (strings) {
+            char* pPragmas = mPragmas.getUnwrapped();
+            while (stringCount-- > 0) {
+                *strings++ = pPragmas;
+                pPragmas += strlen(pPragmas) + 1;
+            }
+        }
+    }
+
+    void getProgramBinary(ACCvoid** base, ACCsizei* length) {
+        *base = pCodeBuf->getBase();
+        *length = (ACCsizei) pCodeBuf->getSize();
+    }
+
+    char* getErrorMessage() {
+        return mErrorBuf.getUnwrapped();
+    }
+};
+
+const char* Compiler::operatorChars =
+    "++--*@/@%@+@-@<<>><=>=<@>@==!=&&||&@^@|@~@!@";
+
+const char Compiler::operatorLevel[] =
+    {11, 11, 1, 1, 1, 2, 2, 3, 3, 4, 4, 4, 4,
+            5, 5, /* ==, != */
+            9, 10, /* &&, || */
+            6, 7, 8, /* & ^ | */
+            2, 2 /* ~ ! */
+            };
+
+#ifdef PROVIDE_X86_CODEGEN
+const int Compiler::X86CodeGenerator::operatorHelper[] = {
+        0x1,     // ++
+        0xff,    // --
+        0xc1af0f, // *
+        0xf9f79991, // /
+        0xf9f79991, // % (With manual assist to swap results)
+        0xc801, // +
+        0xd8f7c829, // -
+        0xe0d391, // <<
+        0xf8d391, // >>
+        0xe, // <=
+        0xd, // >=
+        0xc, // <
+        0xf, // >
+        0x4, // ==
+        0x5, // !=
+        0x0, // &&
+        0x1, // ||
+        0xc821, // &
+        0xc831, // ^
+        0xc809, // |
+        0xd0f7, // ~
+        0x4     // !
+};
+#endif
+
+struct ACCscript {
+    ACCscript() {
+        text = 0;
+        textLength = 0;
+        accError = ACC_NO_ERROR;
+    }
+
+    ~ACCscript() {
+        delete text;
+    }
+
+    void registerSymbolCallback(ACCSymbolLookupFn pFn, ACCvoid* pContext) {
+        compiler.registerSymbolCallback(pFn, pContext);
+    }
+
+    void setError(ACCenum error) {
+        if (accError == ACC_NO_ERROR && error != ACC_NO_ERROR) {
+            accError = error;
+        }
+    }
+
+    ACCenum getError() {
+        ACCenum result = accError;
+        accError = ACC_NO_ERROR;
+        return result;
+    }
+
+    Compiler compiler;
+    char* text;
+    int textLength;
+    ACCenum accError;
+};
+
+
+extern "C"
+ACCscript* accCreateScript() {
+    return new ACCscript();
+}
+
+extern "C"
+ACCenum accGetError( ACCscript* script ) {
+    return script->getError();
+}
+
+extern "C"
+void accDeleteScript(ACCscript* script) {
+    delete script;
+}
+
+extern "C"
+void accRegisterSymbolCallback(ACCscript* script, ACCSymbolLookupFn pFn,
+                               ACCvoid* pContext) {
+    script->registerSymbolCallback(pFn, pContext);
+}
+
+extern "C"
+void accScriptSource(ACCscript* script,
+    ACCsizei count,
+    const ACCchar ** string,
+    const ACCint * length) {
+    int totalLength = 0;
+    for(int i = 0; i < count; i++) {
+        int len = -1;
+        const ACCchar* s = string[i];
+        if (length) {
+            len = length[i];
+        }
+        if (len < 0) {
+            len = strlen(s);
+        }
+        totalLength += len;
+    }
+    delete script->text;
+    char* text = new char[totalLength + 1];
+    script->text = text;
+    script->textLength = totalLength;
+    char* dest = text;
+    for(int i = 0; i < count; i++) {
+        int len = -1;
+        const ACCchar* s = string[i];
+        if (length) {
+            len = length[i];
+        }
+        if (len < 0) {
+            len = strlen(s);
+        }
+        memcpy(dest, s, len);
+        dest += len;
+    }
+    text[totalLength] = '\0';
+
+#ifdef DEBUG_SAVE_INPUT_TO_FILE
+    LOGD("Saving input to file...");
+    int counter;
+    char path[PATH_MAX];
+    for (counter = 0; counter < 4096; counter++) {
+        sprintf(path, DEBUG_DUMP_PATTERN, counter);
+        if(access(path, F_OK) != 0) {
+            break;
+        }
+    }
+    if (counter < 4096) {
+        LOGD("Saving input to file %s", path);
+        FILE* fd = fopen(path, "w");
+        if (fd) {
+            fwrite(text, totalLength, 1, fd);
+            fclose(fd);
+            LOGD("Saved input to file %s", path);
+        } else {
+            LOGD("Could not save. errno: %d", errno);
+        }
+    }
+#endif
+}
+
+extern "C"
+void accCompileScript(ACCscript* script) {
+    int result = script->compiler.compile(script->text, script->textLength);
+    if (result) {
+        script->setError(ACC_INVALID_OPERATION);
+    }
+}
+
+extern "C"
+void accGetScriptiv(ACCscript* script,
+    ACCenum pname,
+    ACCint * params) {
+    switch (pname) {
+        case ACC_INFO_LOG_LENGTH:
+            *params = 0;
+            break;
+    }
+}
+
+extern "C"
+void accGetScriptInfoLog(ACCscript* script,
+    ACCsizei maxLength,
+    ACCsizei * length,
+    ACCchar * infoLog) {
+    char* message = script->compiler.getErrorMessage();
+    int messageLength = strlen(message) + 1;
+    if (length) {
+        *length = messageLength;
+    }
+    if (infoLog && maxLength > 0) {
+        int trimmedLength = maxLength < messageLength ?
+                maxLength : messageLength;
+        memcpy(infoLog, message, trimmedLength);
+        infoLog[trimmedLength] = 0;
+    }
+}
+
+extern "C"
+void accGetScriptLabel(ACCscript* script, const ACCchar * name,
+                       ACCvoid ** address) {
+    void* value = script->compiler.lookup(name);
+    if (value) {
+        *address = value;
+    } else {
+        script->setError(ACC_INVALID_VALUE);
+    }
+}
+
+extern "C"
+void accGetPragmas(ACCscript* script, ACCsizei* actualStringCount,
+                   ACCsizei maxStringCount, ACCchar** strings){
+    script->compiler.getPragmas(actualStringCount, maxStringCount, strings);
+}
+
+extern "C"
+void accGetProgramBinary(ACCscript* script,
+    ACCvoid** base, ACCsizei* length) {
+    script->compiler.getProgramBinary(base, length);
+}
+
+
+} // namespace acc
+
diff --git a/libacc/tests/.gitignore b/libacc/tests/.gitignore
new file mode 100644
index 0000000..a26b298
--- /dev/null
+++ b/libacc/tests/.gitignore
@@ -0,0 +1,2 @@
+test-acc
+*.out
diff --git a/libacc/tests/Android.mk b/libacc/tests/Android.mk
new file mode 100644
index 0000000..e9fbe03
--- /dev/null
+++ b/libacc/tests/Android.mk
@@ -0,0 +1,66 @@
+LOCAL_PATH:= $(call my-dir)
+
+# Executable for host
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE:= acc
+
+LOCAL_SRC_FILES:= \
+	main.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libacc
+
+LOCAL_MODULE_TAGS := tests
+
+include $(BUILD_HOST_EXECUTABLE)
+
+# Executable for target
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE:= acc
+
+LOCAL_SRC_FILES:= \
+	main.cpp \
+    disassem.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libacc
+
+LOCAL_CFLAGS := -O0 -g 
+
+LOCAL_MODULE_TAGS := tests
+
+include $(BUILD_EXECUTABLE)
+
+# Runtime tests for host
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE:= accRuntimeTest
+
+LOCAL_SRC_FILES:= \
+	runtimeTest.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libacc
+
+LOCAL_MODULE_TAGS := tests
+
+include $(BUILD_HOST_EXECUTABLE)
+
+# Runtime tests for target
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE:= accRuntimeTest
+
+LOCAL_SRC_FILES:= \
+	runtimeTest.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libacc
+
+LOCAL_CFLAGS := -O0 -g 
+
+LOCAL_MODULE_TAGS := tests
+
+include $(BUILD_EXECUTABLE)
diff --git a/libacc/tests/accarm b/libacc/tests/accarm
new file mode 100755
index 0000000..6b1bf66
--- /dev/null
+++ b/libacc/tests/accarm
@@ -0,0 +1,69 @@
+#!/usr/bin/python
+#
+# Run a test on the ARM version of acc.
+
+import unittest
+import subprocess
+import os
+import sys
+
+def compile(args):
+    proc = subprocess.Popen(["acc"] + args, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+    result = proc.communicate()
+    return result
+
+def runCmd(args):
+    proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    result = proc.communicate()
+    return result[0].strip()
+
+def uname():
+    return runCmd(["uname"])
+
+def unameM():
+    return runCmd(["uname", "-m"])
+
+def which(item):
+    return runCmd(["which", item])
+
+def adb(args):
+    return runCmd(["adb"] + args)
+
+def setupArm(file):
+    print "Setting up arm"
+    adb(["remount"])
+    adb(["shell", "rm", "/system/bin/acc"])
+    adb(["shell", "mkdir", "/system/bin/accdata"])
+    adb(["shell", "mkdir", "/system/bin/accdata/data"])
+
+    remoteFileName = os.path.join("/system/bin/accdata", file)
+    adb(["push", file, remoteFileName])
+
+    # Copy over compiler
+    adb(["sync"])
+    return remoteFileName
+
+def compileArm(args):
+    remoteArgs = []
+    fileName = ""
+    for arg in sys.argv[1:]:
+        if arg.startswith('-'):
+            remoteArgs.append(arg)
+        else:
+            fileName = arg
+
+    remoteFileName = setupArm(fileName)
+    remoteArgs.append(remoteFileName)
+    remoteCmdLine = ["adb", "shell", "/system/bin/acc"] + remoteArgs
+    proc = subprocess.Popen(remoteCmdLine, stdout=subprocess.PIPE)
+    result = proc.communicate()
+    return result[0].replace("\r","")
+
+
+def main():
+    print compileArm(sys.argv[1:])
+
+if __name__ == '__main__':
+    main()
+
+
diff --git a/libacc/tests/armreg.h b/libacc/tests/armreg.h
new file mode 100644
index 0000000..fde81ba
--- /dev/null
+++ b/libacc/tests/armreg.h
@@ -0,0 +1,300 @@
+/*	$NetBSD: armreg.h,v 1.28 2003/10/31 16:30:15 scw Exp $	*/
+
+/*-
+ * Copyright (c) 1998, 2001 Ben Harris
+ * Copyright (c) 1994-1996 Mark Brinicombe.
+ * Copyright (c) 1994 Brini.
+ * All rights reserved.
+ *
+ * This code is derived from software written for Brini by Mark Brinicombe
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Brini.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: /repoman/r/ncvs/src/sys/arm/include/armreg.h,v 1.3 2005/11/21 19:06:25 cognet Exp $
+ */
+
+#ifndef MACHINE_ARMREG_H
+#define MACHINE_ARMREG_H
+#define INSN_SIZE	4
+#define INSN_COND_MASK	0xf0000000	/* Condition mask */
+#define PSR_MODE        0x0000001f      /* mode mask */
+#define PSR_USR26_MODE  0x00000000
+#define PSR_FIQ26_MODE  0x00000001
+#define PSR_IRQ26_MODE  0x00000002
+#define PSR_SVC26_MODE  0x00000003
+#define PSR_USR32_MODE  0x00000010
+#define PSR_FIQ32_MODE  0x00000011
+#define PSR_IRQ32_MODE  0x00000012
+#define PSR_SVC32_MODE  0x00000013
+#define PSR_ABT32_MODE  0x00000017
+#define PSR_UND32_MODE  0x0000001b
+#define PSR_SYS32_MODE  0x0000001f
+#define PSR_32_MODE     0x00000010
+#define PSR_FLAGS	0xf0000000    /* flags */
+
+#define PSR_C_bit (1 << 29)       /* carry */
+
+/* The high-order byte is always the implementor */
+#define CPU_ID_IMPLEMENTOR_MASK	0xff000000
+#define CPU_ID_ARM_LTD		0x41000000 /* 'A' */
+#define CPU_ID_DEC		0x44000000 /* 'D' */
+#define CPU_ID_INTEL		0x69000000 /* 'i' */
+#define	CPU_ID_TI		0x54000000 /* 'T' */
+
+/* How to decide what format the CPUID is in. */
+#define CPU_ID_ISOLD(x)		(((x) & 0x0000f000) == 0x00000000)
+#define CPU_ID_IS7(x)		(((x) & 0x0000f000) == 0x00007000)
+#define CPU_ID_ISNEW(x)		(!CPU_ID_ISOLD(x) && !CPU_ID_IS7(x))
+
+/* On ARM3 and ARM6, this byte holds the foundry ID. */
+#define CPU_ID_FOUNDRY_MASK	0x00ff0000
+#define CPU_ID_FOUNDRY_VLSI	0x00560000
+
+/* On ARM7 it holds the architecture and variant (sub-model) */
+#define CPU_ID_7ARCH_MASK	0x00800000
+#define CPU_ID_7ARCH_V3		0x00000000
+#define CPU_ID_7ARCH_V4T	0x00800000
+#define CPU_ID_7VARIANT_MASK	0x007f0000
+
+/* On more recent ARMs, it does the same, but in a different format */
+#define CPU_ID_ARCH_MASK	0x000f0000
+#define CPU_ID_ARCH_V3		0x00000000
+#define CPU_ID_ARCH_V4		0x00010000
+#define CPU_ID_ARCH_V4T		0x00020000
+#define CPU_ID_ARCH_V5		0x00030000
+#define CPU_ID_ARCH_V5T		0x00040000
+#define CPU_ID_ARCH_V5TE	0x00050000
+#define CPU_ID_VARIANT_MASK	0x00f00000
+
+/* Next three nybbles are part number */
+#define CPU_ID_PARTNO_MASK	0x0000fff0
+
+/* Intel XScale has sub fields in part number */
+#define CPU_ID_XSCALE_COREGEN_MASK	0x0000e000 /* core generation */
+#define CPU_ID_XSCALE_COREREV_MASK	0x00001c00 /* core revision */
+#define CPU_ID_XSCALE_PRODUCT_MASK	0x000003f0 /* product number */
+
+/* And finally, the revision number. */
+#define CPU_ID_REVISION_MASK	0x0000000f
+
+/* Individual CPUs are probably best IDed by everything but the revision. */
+#define CPU_ID_CPU_MASK		0xfffffff0
+
+/* Fake CPU IDs for ARMs without CP15 */
+#define CPU_ID_ARM2		0x41560200
+#define CPU_ID_ARM250		0x41560250
+
+/* Pre-ARM7 CPUs -- [15:12] == 0 */
+#define CPU_ID_ARM3		0x41560300
+#define CPU_ID_ARM600		0x41560600
+#define CPU_ID_ARM610		0x41560610
+#define CPU_ID_ARM620		0x41560620
+
+/* ARM7 CPUs -- [15:12] == 7 */
+#define CPU_ID_ARM700		0x41007000 /* XXX This is a guess. */
+#define CPU_ID_ARM710		0x41007100
+#define CPU_ID_ARM7500		0x41027100 /* XXX This is a guess. */
+#define CPU_ID_ARM710A		0x41047100 /* inc ARM7100 */
+#define CPU_ID_ARM7500FE	0x41077100
+#define CPU_ID_ARM710T		0x41807100
+#define CPU_ID_ARM720T		0x41807200
+#define CPU_ID_ARM740T8K	0x41807400 /* XXX no MMU, 8KB cache */
+#define CPU_ID_ARM740T4K	0x41817400 /* XXX no MMU, 4KB cache */
+
+/* Post-ARM7 CPUs */
+#define CPU_ID_ARM810		0x41018100
+#define CPU_ID_ARM920T		0x41129200
+#define CPU_ID_ARM920T_ALT	0x41009200
+#define CPU_ID_ARM922T		0x41029220
+#define CPU_ID_ARM940T		0x41029400 /* XXX no MMU */
+#define CPU_ID_ARM946ES		0x41049460 /* XXX no MMU */
+#define	CPU_ID_ARM966ES		0x41049660 /* XXX no MMU */
+#define	CPU_ID_ARM966ESR1	0x41059660 /* XXX no MMU */
+#define CPU_ID_ARM1020E		0x4115a200 /* (AKA arm10 rev 1) */
+#define CPU_ID_ARM1022ES	0x4105a220
+#define CPU_ID_SA110		0x4401a100
+#define CPU_ID_SA1100		0x4401a110
+#define	CPU_ID_TI925T		0x54029250
+#define CPU_ID_SA1110		0x6901b110
+#define CPU_ID_IXP1200		0x6901c120
+#define CPU_ID_80200		0x69052000
+#define CPU_ID_PXA250    	0x69052100 /* sans core revision */
+#define CPU_ID_PXA210    	0x69052120
+#define CPU_ID_PXA250A		0x69052100 /* 1st version Core */
+#define CPU_ID_PXA210A		0x69052120 /* 1st version Core */
+#define CPU_ID_PXA250B		0x69052900 /* 3rd version Core */
+#define CPU_ID_PXA210B		0x69052920 /* 3rd version Core */
+#define CPU_ID_PXA250C		0x69052d00 /* 4th version Core */
+#define CPU_ID_PXA210C		0x69052d20 /* 4th version Core */
+#define	CPU_ID_80321_400	0x69052420
+#define	CPU_ID_80321_600	0x69052430
+#define	CPU_ID_80321_400_B0	0x69052c20
+#define	CPU_ID_80321_600_B0	0x69052c30
+#define	CPU_ID_IXP425_533	0x690541c0
+#define	CPU_ID_IXP425_400	0x690541d0
+#define	CPU_ID_IXP425_266	0x690541f0
+
+/* ARM3-specific coprocessor 15 registers */
+#define ARM3_CP15_FLUSH		1
+#define ARM3_CP15_CONTROL	2
+#define ARM3_CP15_CACHEABLE	3
+#define ARM3_CP15_UPDATEABLE	4
+#define ARM3_CP15_DISRUPTIVE	5	
+
+/* ARM3 Control register bits */
+#define ARM3_CTL_CACHE_ON	0x00000001
+#define ARM3_CTL_SHARED		0x00000002
+#define ARM3_CTL_MONITOR	0x00000004
+
+/*
+ * Post-ARM3 CP15 registers:
+ *
+ *	1	Control register
+ *
+ *	2	Translation Table Base
+ *
+ *	3	Domain Access Control
+ *
+ *	4	Reserved
+ *
+ *	5	Fault Status
+ *
+ *	6	Fault Address
+ *
+ *	7	Cache/write-buffer Control
+ *
+ *	8	TLB Control
+ *
+ *	9	Cache Lockdown
+ *
+ *	10	TLB Lockdown
+ *
+ *	11	Reserved
+ *
+ *	12	Reserved
+ *
+ *	13	Process ID (for FCSE)
+ *
+ *	14	Reserved
+ *
+ *	15	Implementation Dependent
+ */
+
+/* Some of the definitions below need cleaning up for V3/V4 architectures */
+
+/* CPU control register (CP15 register 1) */
+#define CPU_CONTROL_MMU_ENABLE	0x00000001 /* M: MMU/Protection unit enable */
+#define CPU_CONTROL_AFLT_ENABLE	0x00000002 /* A: Alignment fault enable */
+#define CPU_CONTROL_DC_ENABLE	0x00000004 /* C: IDC/DC enable */
+#define CPU_CONTROL_WBUF_ENABLE 0x00000008 /* W: Write buffer enable */
+#define CPU_CONTROL_32BP_ENABLE 0x00000010 /* P: 32-bit exception handlers */
+#define CPU_CONTROL_32BD_ENABLE 0x00000020 /* D: 32-bit addressing */
+#define CPU_CONTROL_LABT_ENABLE 0x00000040 /* L: Late abort enable */
+#define CPU_CONTROL_BEND_ENABLE 0x00000080 /* B: Big-endian mode */
+#define CPU_CONTROL_SYST_ENABLE 0x00000100 /* S: System protection bit */
+#define CPU_CONTROL_ROM_ENABLE	0x00000200 /* R: ROM protection bit */
+#define CPU_CONTROL_CPCLK	0x00000400 /* F: Implementation defined */
+#define CPU_CONTROL_BPRD_ENABLE 0x00000800 /* Z: Branch prediction enable */
+#define CPU_CONTROL_IC_ENABLE   0x00001000 /* I: IC enable */
+#define CPU_CONTROL_VECRELOC	0x00002000 /* V: Vector relocation */
+#define CPU_CONTROL_ROUNDROBIN	0x00004000 /* RR: Predictable replacement */
+#define CPU_CONTROL_V4COMPAT	0x00008000 /* L4: ARMv4 compat LDR R15 etc */
+
+#define CPU_CONTROL_IDC_ENABLE	CPU_CONTROL_DC_ENABLE
+
+/* XScale Auxillary Control Register (CP15 register 1, opcode2 1) */
+#define	XSCALE_AUXCTL_K		0x00000001 /* dis. write buffer coalescing */
+#define	XSCALE_AUXCTL_P		0x00000002 /* ECC protect page table access */
+#define	XSCALE_AUXCTL_MD_WB_RA	0x00000000 /* mini-D$ wb, read-allocate */
+#define	XSCALE_AUXCTL_MD_WB_RWA	0x00000010 /* mini-D$ wb, read/write-allocate */
+#define	XSCALE_AUXCTL_MD_WT	0x00000020 /* mini-D$ wt, read-allocate */
+#define	XSCALE_AUXCTL_MD_MASK	0x00000030
+
+/* Cache type register definitions */
+#define	CPU_CT_ISIZE(x)		((x) & 0xfff)		/* I$ info */
+#define	CPU_CT_DSIZE(x)		(((x) >> 12) & 0xfff)	/* D$ info */
+#define	CPU_CT_S		(1U << 24)		/* split cache */
+#define	CPU_CT_CTYPE(x)		(((x) >> 25) & 0xf)	/* cache type */
+
+#define	CPU_CT_CTYPE_WT		0	/* write-through */
+#define	CPU_CT_CTYPE_WB1	1	/* write-back, clean w/ read */
+#define	CPU_CT_CTYPE_WB2	2	/* w/b, clean w/ cp15,7 */
+#define	CPU_CT_CTYPE_WB6	6	/* w/b, cp15,7, lockdown fmt A */
+#define	CPU_CT_CTYPE_WB7	7	/* w/b, cp15,7, lockdown fmt B */
+
+#define	CPU_CT_xSIZE_LEN(x)	((x) & 0x3)		/* line size */
+#define	CPU_CT_xSIZE_M		(1U << 2)		/* multiplier */
+#define	CPU_CT_xSIZE_ASSOC(x)	(((x) >> 3) & 0x7)	/* associativity */
+#define	CPU_CT_xSIZE_SIZE(x)	(((x) >> 6) & 0x7)	/* size */
+
+/* Fault status register definitions */
+
+#define FAULT_TYPE_MASK 0x0f
+#define FAULT_USER      0x10
+
+#define FAULT_WRTBUF_0  0x00 /* Vector Exception */
+#define FAULT_WRTBUF_1  0x02 /* Terminal Exception */
+#define FAULT_BUSERR_0  0x04 /* External Abort on Linefetch -- Section */
+#define FAULT_BUSERR_1  0x06 /* External Abort on Linefetch -- Page */
+#define FAULT_BUSERR_2  0x08 /* External Abort on Non-linefetch -- Section */
+#define FAULT_BUSERR_3  0x0a /* External Abort on Non-linefetch -- Page */
+#define FAULT_BUSTRNL1  0x0c /* External abort on Translation -- Level 1 */
+#define FAULT_BUSTRNL2  0x0e /* External abort on Translation -- Level 2 */
+#define FAULT_ALIGN_0   0x01 /* Alignment */
+#define FAULT_ALIGN_1   0x03 /* Alignment */
+#define FAULT_TRANS_S   0x05 /* Translation -- Section */
+#define FAULT_TRANS_P   0x07 /* Translation -- Page */
+#define FAULT_DOMAIN_S  0x09 /* Domain -- Section */
+#define FAULT_DOMAIN_P  0x0b /* Domain -- Page */
+#define FAULT_PERM_S    0x0d /* Permission -- Section */
+#define FAULT_PERM_P    0x0f /* Permission -- Page */
+
+#define	FAULT_IMPRECISE	0x400	/* Imprecise exception (XSCALE) */
+
+/*
+ * Address of the vector page, low and high versions.
+ */
+#define	ARM_VECTORS_LOW		0x00000000U
+#define	ARM_VECTORS_HIGH	0xffff0000U
+
+/*
+ * ARM Instructions
+ *
+ *       3 3 2 2 2                              
+ *       1 0 9 8 7                                                     0
+ *      +-------+-------------------------------------------------------+
+ *      | cond  |              instruction dependant                    |
+ *      |c c c c|                                                       |
+ *      +-------+-------------------------------------------------------+
+ */
+
+#define INSN_SIZE		4		/* Always 4 bytes */
+#define INSN_COND_MASK		0xf0000000	/* Condition mask */
+#define INSN_COND_AL		0xe0000000	/* Always condition */
+
+#endif /* !MACHINE_ARMREG_H */
diff --git a/libacc/tests/data/addressOf.c b/libacc/tests/data/addressOf.c
new file mode 100644
index 0000000..e7acde5
--- /dev/null
+++ b/libacc/tests/data/addressOf.c
@@ -0,0 +1,31 @@
+void testStruct() {
+    struct str {
+        float x;
+        float y;
+    };
+
+    struct str base;
+    int index = 0;
+
+    base.x = 10.0;
+    struct str *s = &base;
+
+    float *v = &(*s).x;
+    float *v2 = &s[index].x;
+    printf("testStruct: %g %g %g\n",base.x, *v, *v2);
+}
+
+void testArray() {
+    int a[2];
+    a[0] = 1;
+    a[1] = 2;
+    int* p = &a[0];
+    int* p2 = a;
+    printf("testArray: %d %d %d\n", a[0], *p, *p2);
+}
+
+int main() {
+    testStruct();
+    testArray();
+    return 0;
+}
diff --git a/libacc/tests/data/array.c b/libacc/tests/data/array.c
new file mode 100644
index 0000000..ca4a728
--- /dev/null
+++ b/libacc/tests/data/array.c
@@ -0,0 +1,107 @@
+// Array allocation tests
+
+void testLocalInt()
+{
+    int a[3];
+    a[0] = 1;
+    a[1] = 2;
+    a[2] = a[0] + a[1];
+    printf("localInt: %d\n", a[2]);
+}
+
+char a[3];
+double d[3];
+
+void testGlobalChar()
+{
+    a[0] = 1;
+    a[1] = 2;
+    a[2] = a[0] + a[1];
+    printf("globalChar: %d\n", a[2]);
+}
+
+void testGlobalDouble()
+{
+    d[0] = 1;
+    d[1] = 2;
+    d[2] = d[0] + d[1];
+    printf("globalDouble: %g\n", d[2]);
+}
+
+void testLocalDouble()
+{
+    double d[3];
+    float  m[12];
+    m[0] = 1.0f;
+    m[1] = 2.0f;
+    d[0] = 1.0;
+    d[1] = 2.0;
+    d[2] = d[0] + d[1];
+    m[2] = m[0] + m[1];
+    printf("localDouble: %g %g\n", d[2], m[2]);
+}
+
+void vectorAdd(int* a, int* b, float* c, int len) {
+    int i;
+    for(i = 0; i < len; i++) {
+        c[i] = a[i] + b[i];
+    }
+}
+
+void testArgs() {
+    int a[3], b[3];
+    float c[3];
+    int i;
+    int len = 3;
+    for(i = 0; i < len; i++) {
+        a[i] = i;
+        b[i] = i;
+        c[i] = 0;
+    }
+    vectorAdd(a,b,c, len);
+    printf("testArgs:");
+    for(i = 0; i < len; i++) {
+        printf(" %g", c[i]);
+    }
+    printf("\n");
+}
+
+void testDecay() {
+    char c[4];
+    c[0] = 'H';
+    c[1] = 'i';
+    c[2] = '!';
+    c[3] = 0;
+    printf("testDecay: %s\n", c);
+}
+
+void test2D() {
+    char c[10][20];
+    int x;
+    int y;
+    printf("test2D:\n");
+    for(y = 0; y < 10; y++) {
+        for(x = 0; x < 20; x++) {
+            c[y][x] = 'a' + (15 & (y * 19 + x));
+        }
+    }
+    for(y = 0; y < 10; y++) {
+        for(x = 0; x < 20; x++) {
+            printf("%c", c[y][x]);
+        }
+        printf("\n");
+    }
+
+}
+
+int main()
+{
+    testLocalInt();
+    testLocalDouble();
+    testGlobalChar();
+    testGlobalDouble();
+    testArgs();
+    testDecay();
+    test2D();
+    return 0;
+}
diff --git a/libacc/tests/data/assignment.c b/libacc/tests/data/assignment.c
new file mode 100644
index 0000000..4fc7801
--- /dev/null
+++ b/libacc/tests/data/assignment.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 0;
+    int b = 1;
+    a = b = 2; // Test that "b = 2" generates an rvalue.
+    if (a = 7) { // Test that a = 7 generates an rvalue.
+        b = 3;
+    }
+    return a;
+}
diff --git a/libacc/tests/data/assignmentop.c b/libacc/tests/data/assignmentop.c
new file mode 100644
index 0000000..649edf9
--- /dev/null
+++ b/libacc/tests/data/assignmentop.c
@@ -0,0 +1,62 @@
+// Test assignment operations
+
+void testAssignment() {
+    int a = 2;
+    a *= 5;
+    printf("2 *= 5  %d\n", a);
+    a = 20;
+    a /= 5;
+    printf("20 /= 5  %d\n", a);
+    a = 17;
+    a %= 5;
+    printf("17 %%= 5  %d\n", a);
+    a = 17;
+    a += 5;
+    printf("17 += 5  %d\n", a);
+    a = 17;
+    a-=5;
+    printf("17 -= 5  %d\n", a);
+    a = 17;
+    a<<=1;
+    printf("17<<= 1  %d\n", a);
+    a = 17;
+    a>>=1;
+    printf("17>>= 1  %d\n", a);
+    a = 17;
+    a&=1;
+    printf("17&= 1  %d\n", a);
+    a = 17;
+    a^=1;
+    printf("17^= 1  %d\n", a);
+    a = 16;
+    a^=1;
+    printf("16|= 1  %d\n", a);
+}
+
+int a;
+
+int* f() {
+    printf("f()\n");
+    return &a;
+}
+
+void testEval() {
+    a = 0;
+    printf("*f() = *f() + 10;\n");
+    *f() = *f() + 10;
+    printf("a = %d\n", a);
+}
+
+void testOpEval() {
+    a = 0;
+    printf("*f() += 10;\n");
+    *f() += 10;
+    printf("a = %d\n", a);
+}
+
+int main() {
+    testAssignment();
+    testEval();
+    testOpEval();
+    return 0;
+}
diff --git a/libacc/tests/data/b2071670.c b/libacc/tests/data/b2071670.c
new file mode 100644
index 0000000..311bc4f
--- /dev/null
+++ b/libacc/tests/data/b2071670.c
@@ -0,0 +1,9 @@
+// See http://b/2071670
+
+int main() {
+    float f = 10.0f;
+    float* floatPointer = &f;
+    // The following line used to incorrectly error: "Incompatible pointer or array types"
+    int* buffer = (int*) floatPointer;
+    return *buffer;
+}
diff --git a/libacc/tests/data/bellard.otccex.c b/libacc/tests/data/bellard.otccex.c
new file mode 100644
index 0000000..e8f0989
--- /dev/null
+++ b/libacc/tests/data/bellard.otccex.c
@@ -0,0 +1,126 @@
+/* #!/usr/local/bin/otcc */
+/*
+ * Sample OTCC C example. You can uncomment the first line and install
+ * otcc in /usr/local/bin to make otcc scripts !  
+ */
+
+/* Any preprocessor directive except #define are ignored. We put this
+   include so that a standard C compiler can compile this code too. */
+#include <stdio.h>
+
+/* defines are handled, but macro arguments cannot be given. No
+   recursive defines are tolerated */
+#define DEFAULT_BASE 10
+
+/*
+ * Only old style K&R prototypes are parsed. Only int arguments are
+ * allowed (implicit types).
+ * 
+ * By benchmarking the execution time of this function (for example
+ * for fib(35)), you'll notice that OTCC is quite fast because it
+ * generates native i386 machine code.  
+ */
+fib(n)
+{
+    if (n <= 2)
+        return 1;
+    else
+        return fib(n-1) + fib(n-2);
+}
+
+/* Identifiers are parsed the same way as C: begins with letter or
+   '_', and then letters, '_' or digits */
+fact(n)
+{
+    /* local variables can be declared. Only 'int' type is supported */
+    int i, r;
+    r = 1;
+    /* 'while' and 'for' loops are supported */
+    for(i=2;i<=n;i++)
+        r = r * i;
+    return r;
+}
+
+/* Well, we could use printf, but it would be too easy */
+print_num(n, b)
+{
+    int tab, p, c;
+    /* Numbers can be entered in decimal, hexadecimal ('0x' prefix) and
+       octal ('0' prefix) */
+    /* more complex programs use malloc */
+    tab = malloc(0x100); 
+    p = tab;
+    while (1) {
+        c = n % b;
+        /* Character constants can be used */
+        if (c >= 10)
+            c = c + 'a' - 10;
+        else
+            c = c + '0';
+        *(char *)p = c;
+        p++;
+        n = n / b;
+        /* 'break' is supported */
+        if (n == 0)
+            break;
+    }
+    while (p != tab) {
+        p--;
+        printf("%c", *(char *)p);
+    }
+    free(tab);
+}
+
+/* 'main' takes standard 'argc' and 'argv' parameters */
+main(argc, argv)
+{
+    /* no local name space is supported, but local variables ARE
+       supported. As long as you do not use a globally defined
+       variable name as local variable (which is a bad habbit), you
+       won't have any problem */
+    int s, n, f, base;
+    
+    /* && and || operator have the same semantics as C (left to right
+       evaluation and early exit) */
+    if (argc != 2 && argc != 3) {
+        /* '*' operator is supported with explicit casting to 'int *',
+           'char *' or 'int (*)()' (function pointer). Of course, 'int'
+           are supposed to be used as pointers too. */
+        s = *(int *)argv;
+        help(s);
+        return 1;
+    }
+    /* Any libc function can be used because OTCC uses dynamic linking */
+    n = atoi(*(int *)(argv + 4));
+    base = DEFAULT_BASE;
+    if (argc >= 3) {
+        base = atoi(*(int *)(argv + 8));
+        if (base < 2 || base > 36) {
+            /* external variables can be used too (here: 'stderr') */
+            fprintf(stderr, "Invalid base\n");
+            return 1;
+        }
+    }
+    printf("fib(%d) = ", n);
+    print_num(fib(n), base);
+    printf("\n");
+
+    printf("fact(%d) = ", n);
+    if (n > 12) {
+        printf("Overflow");
+    } else {
+        /* why not using a function pointer ? */
+        f = &fact;
+        print_num((*(int (*)())f)(n), base);
+    }
+    printf("\n");
+    return 0;
+}
+
+/* functions can be used before being defined */
+help(name)
+{
+    printf("usage: %s n [base]\n", name);
+    printf("Compute fib(n) and fact(n) and output the result in base 'base'\n");
+}
+
diff --git a/libacc/tests/data/brackets.c b/libacc/tests/data/brackets.c
new file mode 100644
index 0000000..bab88a2
--- /dev/null
+++ b/libacc/tests/data/brackets.c
@@ -0,0 +1,61 @@
+void testBrackets(int* ar, int len) {
+    int i;
+    int errors = 0;
+    for (i = 0; i < len; i++) {
+        ar[i] = i;
+    }
+    for (i = 0; i < len; i++) {
+        if (ar[i] != i) {
+            printf("error: [%d] %d != %d\n", i, ar[i], i);
+            errors++;
+        }
+    }
+    printf("Errors: %d\n", errors);
+}
+
+void testBrackets2D(int** ar2D, int lenX, int lenY) {
+    int x, y;
+    int errors = 0;
+    for (x = 0; x < lenX; x++) {
+        for (y = 0; y < lenY; y++) {
+            ar2D[x][y] = x * lenY + y;
+        }
+    }
+    for (x = 0; x < lenX; x++) {
+        for (y = 0; y < lenY; y++) {
+            int expected = x * lenY + y;
+            int val = ar2D[x][y];
+            if (val != expected) {
+                printf("error: [%d][%d] %d != %d\n", x, y, val, expected);
+                errors++;
+            }
+        }
+    }
+    printf("2D Errors: %d\n", errors);
+}
+
+void testHeap() {
+    int* ar = (int*) malloc(100);
+    testBrackets(ar, 25);
+    free(ar);
+}
+
+void testHeap2D() {
+    int lenX = 10;
+    int lenY = 5;
+    int* ar = (int*) malloc(lenX * lenY * 4);
+    int** ar2D = (int**) malloc(lenX * 4);
+    int i;
+    for(i = 0; i < lenX; i++) {
+        ar2D[i] = ar + lenY * i;
+    }
+    testBrackets2D(ar2D, lenX, lenY);
+    free(ar);
+    free(ar2D);
+}
+
+int main() {
+    testHeap();
+    testHeap2D();
+    return 0;
+}
diff --git a/libacc/tests/data/casts.c b/libacc/tests/data/casts.c
new file mode 100644
index 0000000..d3a49b4
--- /dev/null
+++ b/libacc/tests/data/casts.c
@@ -0,0 +1,85 @@
+void test1() {
+    int a = 3;
+    int* pb = &a;
+    int c = *pb;
+    printf("Reading from a pointer: %d %d\n", a, c);
+    *pb = 4;
+    printf("Writing to a pointer: %d\n", a);
+    printf("Testing casts: %d %g %g %d\n", 3, (float) 3, 4.5, (int) 4.5);
+}
+
+void test2() {
+    int x = 4;
+    int px = &x;
+    // int z = * px; // An error, expected a pointer type
+    int y = * (int*) px;
+    printf("Testing reading (int*): %d\n", y);
+}
+
+void test3() {
+    int px = (int) malloc(120);
+    * (int*) px = 8;
+    * (int*) (px + 4) = 9;
+    printf("Testing writing (int*): %d %d\n", * (int*) px, * (int*) (px + 4));
+    free((void*) px);
+}
+
+void test4() {
+    int x = 0x12345678;
+    int px = &x;
+    int a = * (char*) px;
+    int b = * (char*) (px + 1);
+    int c = * (char*) (px + 2);
+    int d = * (char*) (px + 3);
+    printf("Testing reading (char*): 0x%02x 0x%02x 0x%02x 0x%02x\n", a, b, c, d);
+}
+
+void test5() {
+    int x = 0xFFFFFFFF;
+    int px = &x;
+    * (char*) px = 0x21;
+    * (char*) (px + 1) = 0x43;
+    * (char*) (px + 2) = 0x65;
+    * (char*) (px + 3) = 0x87;
+    printf("Testing writing (char*): 0x%08x\n", x);
+}
+
+int f(int b) {
+    printf("f(%d)\n", b);
+    return 7 * b;
+}
+
+void test6() {
+    int fp = &f;
+    int x = (*(int(*)()) fp)(10);
+    printf("Function pointer result: %d\n", x);
+}
+
+void test7() {
+    int px = (int) malloc(120);
+    * (float*) px = 8.8f;
+    * (float*) (px + 4) = 9.9f;
+    printf("Testing read/write (float*): %g %g\n", * (float*) px, * (float*) (px + 4));
+    free((void*) px);
+}
+
+void test8() {
+    int px = (int) malloc(120);
+    * (double*) px = 8.8;
+    * (double*) (px + 8) = 9.9;
+    printf("Testing read/write (double*): %g %g\n", * (double*) px, * (double*) (px + 8));
+    free((void*) px);
+}
+
+
+int main() {
+    test1();
+    test2();
+    test3();
+    test4();
+    test5();
+    test6();
+    test7();
+    test8();
+    return 0;
+}
diff --git a/libacc/tests/data/char.c b/libacc/tests/data/char.c
new file mode 100644
index 0000000..8c63ba2
--- /dev/null
+++ b/libacc/tests/data/char.c
@@ -0,0 +1,13 @@
+char ga;
+char gb;
+
+int main() {
+    char a = 'c';
+    char b = a * 3;
+    printf("a = %d, b = %d\n", a, b);
+    ga = 'd';
+    gb = ga * 3;
+    printf("ga = %d, gb = %d\n", ga, gb);
+    return 0;
+}
+
diff --git a/libacc/tests/data/comma.c b/libacc/tests/data/comma.c
new file mode 100644
index 0000000..496944c
--- /dev/null
+++ b/libacc/tests/data/comma.c
@@ -0,0 +1,35 @@
+int testReturn() {
+    return 10, 20, 30;
+}
+
+int testArg(int a) {
+    return a;
+}
+
+void testComma() {
+    int a;
+    0, a = 10,20;
+    printf("statement: %d\n", a);
+    a = 1;
+    if (a = 0, 1) {
+        printf("if: a = %d\n", a);
+    }
+    int b = 0;
+    a = 10;
+    while(b++,a--) {}
+    printf("while: b = %d\n", b);
+    b = 0;
+    for(b++,a = 0;b++, a < 10; b++, a++) {}
+    printf("for: b = %d\n", b);
+    b = testReturn();
+    printf("return: %d\n", b);
+    b = testArg((a,12));
+    printf("arg: %d\n", b);
+}
+
+
+
+int main() {
+    testComma();
+    return 0;
+}
diff --git a/libacc/tests/data/constants.c b/libacc/tests/data/constants.c
new file mode 100644
index 0000000..230109a
--- /dev/null
+++ b/libacc/tests/data/constants.c
@@ -0,0 +1,30 @@
+#define FOO 0x10
+
+int main() {
+    printf("0 = %d\n", 0);
+    printf("010 = %d\n", 010);
+    printf("0x10 = %d\n", FOO);
+    printf("'\\a' = %d\n", '\a');
+    printf("'\\b' = %d\n", '\b');
+    printf("'\\f' = %d\n", '\f');
+    printf("'\\n' = %d\n", '\n');
+    printf("'\\r' = %d\n", '\r');
+    printf("'\\t' = %d\n", '\t');
+    printf("'\\v' = %d\n", '\v');
+    // Undefined
+    // printf("'\\z' = %d\n", '\z');
+    printf("'\\\\' = %d\n", '\\');
+    printf("'\\'' = %d\n", '\'');
+    printf("'\\\"' = %d\n", '\"');
+    printf("'\\?' = %d\n", '\?');
+    printf("'\\0' = %d\n", '\0');
+    printf("'\\1' = %d\n", '\1');
+    printf("'\\12' = %d\n", '\12');
+    printf("'\\123' = %d\n", '\123');
+    printf("'\\x0' = %d\n", '\x0');
+    printf("'\\x1' = %d\n", '\x1');
+    printf("'\\x12' = %d\n", '\x12');
+    printf("'\\x123' = %d\n", '\x123');
+    printf("'\\x1f' = %d\n", '\x1f');
+    printf("'\\x1F' = %d\n", '\x1F');
+}
diff --git a/libacc/tests/data/defines.c b/libacc/tests/data/defines.c
new file mode 100644
index 0000000..6cb6f7e
--- /dev/null
+++ b/libacc/tests/data/defines.c
@@ -0,0 +1,9 @@
+// Simple tests of the C preprocessor
+
+#define A 1
+#define A (4 / 2)
+#define B 1 // This is a comment. With a / in it.
+
+int main() {
+    return A + B;
+}
diff --git a/libacc/tests/data/double.c b/libacc/tests/data/double.c
new file mode 100644
index 0000000..5bc20a3
--- /dev/null
+++ b/libacc/tests/data/double.c
@@ -0,0 +1,7 @@
+double atof(char *nptr);
+
+int main() {
+    printf("Value = %g\n", atof("10.42"));
+    return 0;
+}
+
diff --git a/libacc/tests/data/error.c b/libacc/tests/data/error.c
new file mode 100644
index 0000000..2e08dcc
--- /dev/null
+++ b/libacc/tests/data/error.c
@@ -0,0 +1,2 @@
+void foo;
+
diff --git a/libacc/tests/data/expr-ansi.c b/libacc/tests/data/expr-ansi.c
new file mode 100644
index 0000000..d463659
--- /dev/null
+++ b/libacc/tests/data/expr-ansi.c
@@ -0,0 +1,60 @@
+/* Test operators */
+
+void testInc() { int a, b; a = 3; b = a++; printf("3++ = %d %d\n", b, a); }
+void testDec() { int a, b; a = 3; b = a--; printf("3-- = %d %d\n", b, a); }
+void testTimes(){ printf("%d * %d = %d\n", 10, 4, 10 * 4); }
+void testDiv(){ printf("%d / %d = %d\n", 11, 4, 11 / 4); }
+void testMod(){ printf("%d %% %d = %d\n", 11, 4, 11 % 4); }
+void testPlus(){ printf("%d + %d = %d\n", 10, 4, 10 + 4); }
+void testMinus(){ printf("%d - %d = %d\n", 10, 4, 10 - 4); }
+void testShiftLeft(){ printf("%d << %d = %d\n", 10, 4, 10 << 4); }
+void testShiftRight(){ printf("%d >> %d = %d\n", 100, 4, 100 >> 4); }
+void testLess(){ printf("%d < %d = %d\n", 10, 4, 10 < 4); }
+void testLesEqual(){ printf("%d <= %d = %d\n", 10, 4, 10 <= 4); }
+void testGreater(){ printf("%d > %d = %d\n", 10, 4, 10 > 4); }
+void testGreaterEqual(){ printf("%d >= %d = %d\n", 10, 4, 10 >= 4); }
+void testEqualTo(){ printf("%d == %d = %d\n", 10, 4, 10 == 4); }
+void testNotEqualTo(){ printf("%d != %d = %d\n", 10, 4, 10 != 4); }
+void testBitAnd(){ printf("%d & %d = %d\n", 10, 7, 10 & 7); }
+void testBitXor(){ printf("%d ^ %d = %d\n", 10, 7, 10 ^ 7); }
+void testBitOr(){ printf("%d | %d = %d\n", 10, 4, 10 | 4); }
+void testAssignment(){ int a, b; a = 3; b = a; printf("b == %d\n", b); }
+void testLogicalAnd(){ printf("%d && %d = %d\n", 10, 4, 10 && 4); }
+void testLogicalOr(){ printf("%d || %d = %d\n", 10, 4, 10 || 4); }
+void testAddressOf(){ int a; printf("&a is %d\n", &a); }
+void testPointerIndirection(){ int a, b; a = &b; b = 17; printf("*%d  = %d =?= %d\n", a, * (int*) a, b); }
+void testNegation(){ printf("-%d = %d\n", 10, -10); }
+void testUnaryPlus(){ printf("+%d = %d\n", 10, +10); }
+void testUnaryNot(){ printf("!%d = %d\n", 10, !10); }
+void testBitNot(){ printf("~%d = %d\n", 10, ~10); }
+
+int main(int a, char** b) {
+    testInc();
+    testDec();
+    testTimes();
+    testDiv();
+    testMod();
+    testPlus();
+    testMinus();
+    testShiftLeft();
+    testShiftRight();
+    testLess();
+    testLesEqual();
+    testGreater();
+    testGreaterEqual();
+    testEqualTo();
+    testNotEqualTo();
+    testBitAnd();
+    testBinXor();
+    testBitOr();
+    testAssignment();
+    testLogicalAnd();
+    testLogicalOr();
+    testAddressOf();
+    testPointerIndirection();
+    testNegation();
+    testUnaryPlus();
+    testUnaryNot();
+    testBitNot();
+    return 0;
+}
diff --git a/libacc/tests/data/expr.c b/libacc/tests/data/expr.c
new file mode 100644
index 0000000..4f2d2e7
--- /dev/null
+++ b/libacc/tests/data/expr.c
@@ -0,0 +1,60 @@
+/* Test operators */
+
+testInc() { int a, b; a = 3; b = a++; printf("3++ = %d %d\n", b, a); }
+testDec() { int a, b; a = 3; b = a--; printf("3-- = %d %d\n", b, a); }
+testTimes(){ printf("%d * %d = %d\n", 10, 4, 10 * 4); }
+testDiv(){ printf("%d / %d = %d\n", 11, 4, 11 / 4); }
+testMod(){ printf("%d %% %d = %d\n", 11, 4, 11 % 4); }
+testPlus(){ printf("%d + %d = %d\n", 10, 4, 10 + 4); }
+testMinus(){ printf("%d - %d = %d\n", 10, 4, 10 - 4); }
+testShiftLeft(){ printf("%d << %d = %d\n", 10, 4, 10 << 4); }
+testShiftRight(){ printf("%d >> %d = %d\n", 100, 4, 100 >> 4); }
+testLess(){ printf("%d < %d = %d\n", 10, 4, 10 < 4); }
+testLesEqual(){ printf("%d <= %d = %d\n", 10, 4, 10 <= 4); }
+testGreater(){ printf("%d > %d = %d\n", 10, 4, 10 > 4); }
+testGreaterEqual(){ printf("%d >= %d = %d\n", 10, 4, 10 >= 4); }
+testEqualTo(){ printf("%d == %d = %d\n", 10, 4, 10 == 4); }
+testNotEqualTo(){ printf("%d != %d = %d\n", 10, 4, 10 != 4); }
+testBitAnd(){ printf("%d & %d = %d\n", 10, 7, 10 & 7); }
+testBitXor(){ printf("%d ^ %d = %d\n", 10, 7, 10 ^ 7); }
+testBitOr(){ printf("%d | %d = %d\n", 10, 4, 10 | 4); }
+testAssignment(){ int a, b; a = 3; b = a; printf("b == %d\n", b); }
+testLogicalAnd(){ printf("%d && %d = %d\n", 10, 4, 10 && 4); }
+testLogicalOr(){ printf("%d || %d = %d\n", 10, 4, 10 || 4); }
+testAddressOf(){ int a; printf("&a is %d\n", &a); }
+testPointerIndirection(){ int a, b; a = &b; b = 17; printf("*%d  = %d =?= %d\n", a, * (int*) a, b); }
+testNegation(){ printf("-%d = %d\n", 10, -10); }
+testUnaryPlus(){ printf("+%d = %d\n", 10, +10); }
+testUnaryNot(){ printf("!%d = %d\n", 10, !10); }
+testBitNot(){ printf("~%d = %d\n", 10, ~10); }
+
+main(a,b) {
+    testInc();
+    testDec();
+    testTimes();
+    testDiv();
+    testMod();
+    testPlus();
+    testMinus();
+    testShiftLeft();
+    testShiftRight();
+    testLess();
+    testLesEqual();
+    testGreater();
+    testGreaterEqual();
+    testEqualTo();
+    testNotEqualTo();
+    testBitAnd();
+    testBinXor();
+    testBitOr();
+    testAssignment();
+    testLogicalAnd();
+    testLogicalOr();
+    testAddressOf();
+    testPointerIndirection();
+    testNegation();
+    testUnaryPlus();
+    testUnaryNot();
+    testBitNot();
+    return 0;
+}
\ No newline at end of file
diff --git a/libacc/tests/data/expr2.c b/libacc/tests/data/expr2.c
new file mode 100644
index 0000000..04b6a38
--- /dev/null
+++ b/libacc/tests/data/expr2.c
@@ -0,0 +1,6 @@
+/* Test operators */
+
+main() {
+    int a;
+    a = a++;
+}
diff --git a/libacc/tests/data/film.c b/libacc/tests/data/film.c
new file mode 100644
index 0000000..00c2d36
--- /dev/null
+++ b/libacc/tests/data/film.c
@@ -0,0 +1,53 @@
+// Test logical and bitwise AND and OR
+
+int test(int x, int y) {
+    int v = x || y;
+    return v;
+}
+
+int test2(int x, int y) {
+    if(x | y) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+int test3(int x, int y) {
+    int v = x && y;
+    return v;
+}
+
+int test4(int x, int y) {
+    if(x & y) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+int main(int index)
+{
+    int x,y;
+    printf("testing...\n");
+    int totalBad = 0;
+    for(y = 0; y < 2; y++) {
+        for(x = 0; x < 2; x++) {
+            int a = test(x,y);
+            int b = test2(x,y);
+            if (a != b) {
+                printf("Results differ: OR x=%d y=%d a=%d b=%d\n", x, y, a, b);
+                totalBad++;
+            }
+            a = test3(x,y);
+            b = test4(x,y);
+            if (a != b) {
+                printf("Results differ: AND x=%d y=%d a=%d b=%d\n", x, y, a, b);
+                totalBad++;
+            }
+        }
+    }
+    printf("Total bad: %d\n", totalBad);
+    return 0;
+}
+
diff --git a/libacc/tests/data/float.c b/libacc/tests/data/float.c
new file mode 100644
index 0000000..f48b3d1
--- /dev/null
+++ b/libacc/tests/data/float.c
@@ -0,0 +1,57 @@
+int ftoi(float f) {
+    return f;
+}
+
+int dtoi(double d) {
+    return d;
+}
+
+float itof(int i) {
+    return i;
+}
+
+double itod(int i) {
+    return i;
+}
+
+float f0, f1;
+double d0, d1;
+
+void testParseConsts() {
+    printf("Constants: %g %g %g %g %g %g %g %g %g\n", 0e1, 0E1, 0.f, .01f,
+          .01e0f, 1.0e-1, 1.0e1, 1.0e+1,
+          .1f);
+}
+void testVars(float arg0, float arg1, double arg2, double arg3) {
+    float local0, local1;
+    double local2, local3;
+    f0 = arg0;
+    f1 = arg1;
+    d0 = arg2;
+    d1 = arg3;
+    local0 = arg0;
+    local1 = arg1;
+    local2 = arg2;
+    local3 = arg3;
+    printf("globals: %g %g %g %g\n", f0, f1, d0, d1);
+    printf("args: %g %g %g %g\n", arg0, arg1, arg2, arg3);
+    printf("locals: %g %g %g %g\n", local0, local1, local2, local3);
+
+
+    printf("cast rval: %g %g\n", * (float*) & f1, * (double*) & d1);
+
+    * (float*) & f0 = 1.1f;
+    * (double*) & d0 = 3.3;
+    printf("cast lval: %g %g %g %g\n", f0, f1, d0, d1);
+}
+
+int main() {
+    testParseConsts();
+    printf("int: %d float: %g double: %g\n", 1, 2.2f, 3.3);
+    printf(" ftoi(1.4f)=%d\n", ftoi(1.4f));
+    printf(" dtoi(2.4)=%d\n", dtoi(2.4));
+    printf(" itof(3)=%g\n", itof(3));
+    printf(" itod(4)=%g\n", itod(4));
+    testVars(1.0f, 2.0f, 3.0, 4.0);
+    return 0;
+}
diff --git a/libacc/tests/data/floatdouble.c b/libacc/tests/data/floatdouble.c
new file mode 100644
index 0000000..264c641
--- /dev/null
+++ b/libacc/tests/data/floatdouble.c
@@ -0,0 +1,9 @@
+int main()
+{
+    // Test coercing values when storing.
+    float a = 0.002;
+    double b = 0.1f;
+    int c = 10.002;
+    printf("%g %g %d\n", a, b, c);
+    return 0;
+}
diff --git a/libacc/tests/data/flops.c b/libacc/tests/data/flops.c
new file mode 100644
index 0000000..40b1b28
--- /dev/null
+++ b/libacc/tests/data/flops.c
@@ -0,0 +1,158 @@
+// Test floating point operations.
+
+void unaryOps() {
+    // Unary ops
+    printf("-%g = %g\n", 1.1, -1.1);
+    printf("!%g = %d\n", 1.2, !1.2);
+    printf("!%g = %d\n", 0.0, !0.0);
+}
+
+void binaryOps() {
+    printf("double op double:\n");
+    printf("%g + %g = %g\n", 1.0, 2.0, 1.0 + 2.0);
+    printf("%g - %g = %g\n", 1.0, 2.0, 1.0 - 2.0);
+    printf("%g * %g = %g\n", 1.0, 2.0, 1.0 * 2.0);
+    printf("%g / %g = %g\n", 1.0, 2.0, 1.0 / 2.0);
+
+    printf("float op float:\n");
+    printf("%g + %g = %g\n", 1.0f, 2.0f, 1.0f + 2.0f);
+    printf("%g - %g = %g\n", 1.0f, 2.0f, 1.0f - 2.0f);
+    printf("%g * %g = %g\n", 1.0f, 2.0f, 1.0f * 2.0f);
+    printf("%g / %g = %g\n", 1.0f, 2.0f, 1.0f / 2.0f);
+
+    printf("double op float:\n");
+    printf("%g + %g = %g\n", 1.0, 2.0f, 1.0 + 2.0f);
+    printf("%g - %g = %g\n", 1.0, 2.0f, 1.0 - 2.0f);
+    printf("%g * %g = %g\n", 1.0, 2.0f, 1.0 * 2.0f);
+    printf("%g / %g = %g\n", 1.0, 2.0f, 1.0 / 2.0f);
+
+    printf("double op int:\n");
+    printf("%g + %d = %g\n", 1.0, 2, 1.0 + 2);
+    printf("%g - %d = %g\n", 1.0, 2, 1.0 - 2);
+    printf("%g * %d = %g\n", 1.0, 2, 1.0 * 2);
+    printf("%g / %d = %g\n", 1.0, 2, 1.0 / 2);
+
+    printf("int op double:\n");
+    printf("%d + %g = %g\n", 1, 2.0, 1 + 2.0);
+    printf("%d - %g = %g\n", 1, 2.0, 1 - 2.0);
+    printf("%d * %g = %g\n", 1, 2.0, 1 * 2.0);
+    printf("%d / %g = %g\n", 1, 2.0, 1 / 2.0);
+}
+
+void comparisonTestdd(double a, double b) {
+    printf("%g op %g: < %d   <= %d   == %d   >= %d   > %d   != %d\n",
+           a, b, a < b, a <= b, a == b, a >= b, a > b, a != b);
+}
+
+void comparisonOpsdd() {
+    printf("double op double:\n");
+    comparisonTestdd(1.0, 2.0);
+    comparisonTestdd(1.0, 1.0);
+    comparisonTestdd(2.0, 1.0);
+}
+
+
+void comparisonTestdf(double a, float b) {
+    printf("%g op %g: < %d   <= %d   == %d   >= %d   > %d   != %d\n",
+           a, b, a < b, a <= b, a == b, a >= b, a > b, a != b);
+}
+
+void comparisonOpsdf() {
+    printf("double op float:\n");
+    comparisonTestdf(1.0, 2.0f);
+    comparisonTestdf(1.0, 1.0f);
+    comparisonTestdf(2.0, 1.0f);
+}
+
+void comparisonTestff(float a, float b) {
+    printf("%g op %g: < %d   <= %d   == %d   >= %d   > %d   != %d\n",
+           a, b, a < b, a <= b, a == b, a >= b, a > b, a != b);
+}
+
+void comparisonOpsff() {
+    printf("float op float:\n");
+    comparisonTestff(1.0f, 2.0f);
+    comparisonTestff(1.0f, 1.0f);
+    comparisonTestff(2.0f, 1.0f);
+}
+
+void comparisonTestid(int a, double b) {
+    printf("%d op %g: < %d   <= %d   == %d   >= %d   > %d   != %d\n",
+           a, b, a < b, a <= b, a == b, a >= b, a > b, a != b);
+}
+
+void comparisonOpsid() {
+    printf("int op double:\n");
+    comparisonTestid(1, 2.0);
+    comparisonTestid(1, 1.0);
+    comparisonTestid(2, 1.0);
+}
+void comparisonTestdi(double a, int b) {
+    printf("%g op %d: < %d   <= %d   == %d   >= %d   > %d   != %d\n",
+           a, b, a < b, a <= b, a == b, a >= b, a > b, a != b);
+}
+
+void comparisonOpsdi() {
+    printf("double op int:\n");
+    comparisonTestdi(1.0f, 2);
+    comparisonTestdi(1.0f, 1);
+    comparisonTestdi(2.0f, 1);
+}
+
+void comparisonOps() {
+    comparisonOpsdd();
+    comparisonOpsdf();
+    comparisonOpsff();
+    comparisonOpsid();
+    comparisonOpsdi();
+}
+
+int branch(double d) {
+    if (d) {
+        return 1;
+    }
+    return 0;
+}
+
+void testBranching() {
+    printf("branching: %d %d %d\n", branch(-1.0), branch(0.0), branch(1.0));
+}
+
+void testpassi(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l) {
+    printf("testpassi: %d %d %d %d %d %d %d %d %d %d %d %d\n", a, b, c, d, e, f, g, h, i, j, k, l);
+}
+
+void testpassf(float a, float b, float c, float d, float e, float f, float g, float h, float i, float j, float k, float l) {
+    printf("testpassf: %g %g %g %g %g %g %g %g %g %g %g %g\n", a, b, c, d, e, f, g, h, i, j, k, l);
+}
+
+void testpassd(double a, double b, double c, double d, double e, double f, double g, double h, double i, double j, double k, double l) {
+    printf("testpassd: %g %g %g %g %g %g %g %g %g %g %g %g\n", a, b, c, d, e, f, g, h, i, j, k, l);
+}
+
+void testpassidf(int i, double d, float f) {
+    printf("testpassidf: %d %g %g\n", i, d, f);
+}
+
+void testParameterPassing() {
+    float x;
+    testpassi(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
+    testpassf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
+    testpassd(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
+    testpassi(1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f, 10.0f, 11.0f, 12.0f);
+    testpassf(1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f, 10.0f, 11.0f, 12.0f);
+    testpassd(1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f, 10.0f, 11.0f, 12.0f);
+    testpassi(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0);
+    testpassf(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0);
+    testpassd(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0);
+    testpassidf(1, 2.0, 3.0f);
+}
+
+int main() {
+    unaryOps();
+    binaryOps();
+    comparisonOps();
+    testBranching();
+    testParameterPassing();
+    return 0;
+}
diff --git a/libacc/tests/data/funcargs.c b/libacc/tests/data/funcargs.c
new file mode 100644
index 0000000..1dce226
--- /dev/null
+++ b/libacc/tests/data/funcargs.c
@@ -0,0 +1,8 @@
+int f(int a,int, int c) {
+    return a + c;
+}
+
+int main() {
+    return f(1,2,3);
+}
+
diff --git a/libacc/tests/data/hello.c b/libacc/tests/data/hello.c
new file mode 100644
index 0000000..585ce6c
--- /dev/null
+++ b/libacc/tests/data/hello.c
@@ -0,0 +1,3 @@
+main(a,b) {
+    printf("Hello, world\n");
+}
diff --git a/libacc/tests/data/inc.c b/libacc/tests/data/inc.c
new file mode 100644
index 0000000..14c09d1
--- /dev/null
+++ b/libacc/tests/data/inc.c
@@ -0,0 +1,14 @@
+// Check integer operations
+
+int main() {
+    int a = 0;
+    printf("%d\n", a++);
+    printf("%d\n", a++);
+    printf("%d\n", a--);
+    printf("%d\n", a--);
+    printf("%d\n", ++a);
+    printf("%d\n", ++a);
+    printf("%d\n", --a);
+    printf("%d\n", --a);
+    return a;
+}
diff --git a/libacc/tests/data/iops.c b/libacc/tests/data/iops.c
new file mode 100644
index 0000000..780e95d
--- /dev/null
+++ b/libacc/tests/data/iops.c
@@ -0,0 +1,23 @@
+// Check integer operations
+
+void loops() {
+    int y;
+    printf("++\n");
+    for(y = 0; y < 10; y++) {
+        printf("%d\n", y);
+    }
+    printf("--\n");
+    for(y = 10; y >= 0; y--) {
+        printf("%d\n", y);
+    }
+}
+
+void checkLiterals() {
+    printf("Literals: %d %d\n", 1, -1);
+}
+
+int main() {
+    checkLiterals();
+    loops();
+    return 0;
+}
diff --git a/libacc/tests/data/locals.c b/libacc/tests/data/locals.c
new file mode 100644
index 0000000..f1ef363
--- /dev/null
+++ b/libacc/tests/data/locals.c
@@ -0,0 +1,71 @@
+int a;
+
+int f() {
+    int a;
+    // Undefined variable b
+    // printf("f 0: a = %d b = %d\n", a, b);
+    printf("f 0: a = %d\n", a);
+    a = 2;
+    printf("f 1: a = %d\n", a);
+}
+
+int g(int a) {
+    printf("g 0: a = %d\n", a);
+    a = 3;
+    printf("g 1: a = %d\n", a);
+}
+
+int h(int a) {
+    // int a; // gcc 4.3 says error: 'a' redeclared as different kind of symbol
+
+    printf("h 0: a = %d\n", a);
+    a = 4;
+    printf("h 1: a = %d\n", a);
+}
+
+// Already defined global 
+// int h() {}
+int globCheck() {
+    fprintf(stdout, "globCheck()\n");
+}
+
+int fwdCheck() {
+    b();
+    // Undefined forward reference
+    // c();
+}
+
+int b() {
+    printf("b()\n");
+}
+
+int nested() {
+    int a;
+    printf("nested 0: a = %d\n", a);
+    a = 50;
+    printf("nested 1: a = %d\n", a);
+    {
+        int a;
+        printf("nested 2: a = %d\n", a);
+        a = 51;
+        printf("nested 3: a = %d\n", a);
+    }
+    printf("nested 4: a = %d\n", a);
+}
+
+int main() {
+    globCheck();
+    fwdCheck();
+    printf("main 0: a = %d\n", a);
+    a = 5;
+    printf("main 1: a = %d\n", a);
+    f();
+    printf("main 2: a = %d\n", a);
+    g(77);
+    printf("main 3: a = %d\n", a);
+    h(30);
+    printf("main 4: a = %d\n", a);
+    nested();
+    printf("main 5: a = %d\n", a);
+    return 0;
+}
diff --git a/libacc/tests/data/missing-main.c b/libacc/tests/data/missing-main.c
new file mode 100644
index 0000000..e73eec4
--- /dev/null
+++ b/libacc/tests/data/missing-main.c
@@ -0,0 +1,4 @@
+/* No main. */
+
+a() {
+}
\ No newline at end of file
diff --git a/libacc/tests/data/otcc-ansi.c b/libacc/tests/data/otcc-ansi.c
new file mode 100644
index 0000000..72580e9
--- /dev/null
+++ b/libacc/tests/data/otcc-ansi.c
@@ -0,0 +1,466 @@
+// #include <stdio.h>
+int d, z, C, h, P, K, ac, q, G, v, Q, R, D, L, W, M;
+
+void E(int e) {
+    *(char*) D++ = e;
+}
+
+void o() {
+    if (L) {
+        h = *(char*) L++;
+        if (h == 2) {
+            L = 0;
+            h = W;
+        }
+    } else
+        h = fgetc(Q);
+}
+
+int X() {
+    return isalnum(h) | h == 95;
+}
+
+void Y() {
+    if (h == 92) {
+        o();
+        if (h == 110)
+            h = 10;
+    }
+}
+
+void ad() {
+    int e, j, m;
+    while (isspace(h) | h == 35) {
+        if (h == 35) {
+            o();
+            ad();
+            if (d == 536) {
+                ad();
+                E(32);
+                *(int*) d = 1;
+                *(int*) (d + 4) = D;
+            }
+            while (h != 10) {
+                E(h);
+                o();
+            }
+            E(h);
+            E(2);
+        }
+        o();
+    }
+    C = 0;
+    d = h;	
+    if (X()) {
+        E(32);
+        M = D;
+        while (X()) {
+            E(h);
+            o();
+        }
+        if (isdigit(d)) {
+            z = strtol(M, 0, 0);
+            d = 2;
+        } else {
+            *(char*) D = 32;
+            d = strstr(R, M - 1) - R;
+            *(char*) D = 0;
+            d = d * 8 + 256;
+            if (d > 536) {
+                d = P + d;
+                if (*(int*) d == 1) {
+                    L = *(int*) (d + 4);
+                    W = h;
+                    o();
+                    ad();
+                }
+            }
+        }
+    } else {
+        o();
+        if (d == 39) {
+            d = 2;
+            Y();
+            z = h;
+            o();
+            o();
+        } else if (d == 47 & h == 42) {
+            o();
+            while (h) {
+                while (h != 42)
+                    o();
+                o();
+                if (h == 47)
+                    h = 0;
+            }
+            o();
+            ad();
+        } else {
+            e
+                    = "++#m--%am*@R<^1c/@%[_[H3c%@%[_[H3c+@.B#d-@%:_^BKd<<Z/03e>>`/03e<=0f>=/f<@.f>@1f==&g!='g&&k||#l&@.BCh^@.BSi|@.B+j~@/%Yd!@&d*@b";
+            while (j = *(char*) e++) {
+                m = *(char*) e++;
+                z = 0;
+                while ((C = *(char*) e++ - 98) < 0)
+                    z = z * 64 + C + 64;
+                if (j == d & (m == h | m == 64)) {
+                    if (m == h) {
+                        o();
+                        d = 1;
+                    }
+                    break;
+                }
+            }
+        }
+    }
+}
+
+void ae(int g) {
+    while( g&&g!=-1) {
+        *(char*) q++=g;
+        g=g>>8;
+    }
+}
+
+void A(int e) {
+    int g;
+    while( e) {
+        g=*(int*) e;
+        *(int*) e=q-e-4;
+        e=g;
+    }
+}
+
+int s(int g, int e) {
+    ae(g);
+    *(int*) q = e;
+    e = q;
+    q = q + 4;
+    return e;
+}
+
+void H(int e) {
+    s(184,e);
+}
+
+int B(int e) {
+    return s(233,e);
+}
+
+int S(int j, int e) {
+    ae(1032325);
+    return s(132 + j, e);
+}
+
+void Z(int e) {
+    ae( 49465);
+    H(0);
+    ae( 15);
+    ae( e+144);
+    ae( 192);
+}
+
+void N(int j, int e) {
+    ae(j + 131);
+    s((e > -512 && e < 512) << 7 | 5, e);
+}
+
+void T (int j) {
+    int g,e,m,aa;
+    g=1;
+    if( d == 34) {
+        H(v);
+        while( h!=34) {
+            Y ();
+            *(char*) v++=h;
+            o ();
+        }
+        *(char*) v=0;
+        v=v +4&-4;
+        o ();
+        ad();
+    }
+    else {
+        aa=C;
+        m= z;
+        e=d;
+        ad();
+        if( e == 2) {
+            H(m);
+        }
+        else if( aa == 2) {
+            T(0);
+            s(185,0);
+            if( e == 33)Z(m);
+            else ae( m);
+        }
+        else if( e == 40) {
+            w ();
+            ad();
+        }
+        else if( e == 42) {
+            ad();
+            e=d;
+            ad();
+            ad();
+            if( d == 42) {
+                ad();
+                ad();
+                ad();
+                ad();
+                e=0;
+            }
+            ad();
+            T(0);
+            if( d == 61) {
+                ad();
+                ae( 80);
+                w ();
+                ae( 89);
+                ae( 392+(e == 256));
+            }
+            else if( e) {
+                if( e == 256)ae( 139);
+                else ae( 48655);
+                q++;
+            }
+        }
+        else if( e == 38) {
+            N(10,*(int*) d);
+            ad();
+        }
+        else {
+            g=*(int*) e;
+            if(!g)g=dlsym(0,M);
+            if( d == 61&j) {
+                ad();
+                w ();
+                N(6,g);
+            }
+            else if( d!= 40) {
+                N(8,g);
+                if( C == 11) {
+                    N(0,g);
+                    ae( z);
+                    ad();
+                }
+            }
+        }
+    }
+    if( d == 40) {
+        if( g == 1)ae( 80);
+        m= s(60545,0);
+        ad();
+        j=0;
+        while( d!= 41) {
+            w ();
+            s(2393225,j);
+            if( d == 44)ad();
+            j=j +4;
+        }
+        *(int*) m= j;
+        ad();
+        if(!g) {
+            e=e +4;
+            *(int*) e=s(232,*(int*) e);
+        }
+        else if( g == 1) {
+            s(2397439,j);
+            j=j +4;
+        }
+        else {
+            s(232,g-q-5);
+        }
+        if( j)s(50305,j);
+    }
+}
+
+void O (int j) {
+    int e,g,m;
+    if( j--== 1)T(1);
+    else {
+        O (j);
+        m= 0;
+        while( j == C) {
+            g=d;
+            e=z;
+            ad();
+            if( j>8) {
+                m= S(e,m);
+                O (j);
+            }
+            else {
+                ae( 80);
+                O (j);
+                ae( 89);
+                if( j == 4|j == 5) {
+                    Z(e);
+                }
+                else {
+                    ae( e);
+                    if( g == 37)ae( 146);
+                }
+            }
+        }
+        if( m&&j>8) {
+            m= S(e,m);
+            H(e^1);
+            B(5);
+            A(m);
+            H(e);
+        }
+    }
+}
+
+void w() {
+    O(11);
+}
+
+int U() {
+    w();
+    return S(0, 0);
+}
+
+void I (int j) {
+    int m,g,e;
+    if( d == 288) {
+        ad();
+        ad();
+        m= U ();
+        ad();
+        I (j);
+        if( d == 312) {
+            ad();
+            g=B(0);
+            A(m);
+            I (j);
+            A(g);
+        }
+        else {
+            A(m);
+        }
+    }
+    else if( d == 352|d == 504) {
+        e=d;
+        ad();
+        ad();
+        if( e == 352) {
+            g=q;
+            m= U ();
+        }
+        else {
+            if( d!= 59)w ();
+            ad();
+            g=q;
+            m= 0;
+            if( d!= 59)m= U ();
+            ad();
+            if( d!= 41) {
+                e=B(0);
+                w ();
+                B(g-q-5);
+                A(e);
+                g=e +4;
+            }
+        }
+        ad();
+        I(&m);
+        B(g-q-5);
+        A(m);
+    }
+    else if( d == 123) {
+        ad();
+        ab(1);
+        while( d!= 125)I (j);
+        ad();
+    }
+    else {
+        if( d == 448) {
+            ad();
+            if( d!= 59)w ();
+            K=B(K);
+        }
+        else if( d == 400) {
+            ad();
+            *(int*) j=B(*(int*) j);
+        }
+        else if( d!= 59)w ();
+        ad();
+    }
+}
+
+void ab (int j) {
+    int m;
+    while( d == 256|d!=-1&!j) {
+        if( d == 256) {
+            ad();
+            while( d!= 59) {
+                if( j) {
+                    G=G +4;
+                    *(int*) d=-G;
+                }
+                else {
+                    *(int*) d=v;
+                    v=v +4;
+                }
+                ad();
+                if( d == 44)ad()	;
+            }
+            ad();
+        }
+        else {
+            A(*(int*)(d +4));
+            *(int*) d=q;
+            ad();
+            ad();
+            m= 8;
+            while( d!= 41) {
+                *(int*) d=m;
+                m= m +4;
+                ad();
+                if( d == 44)ad();
+            }
+            ad();
+            K=G=0;
+            ae( 15042901);
+            m= s(60545,0);
+            I(0);
+            A(K);
+            ae( 50121);
+            *(int*) m= G;
+        }
+    }
+}
+
+int run(int g, int e) {
+    return (*(int(*)()) *(int*) (P + 592))(g, e);
+}
+
+int main(int g, int e) {
+    int result;
+    Q = stdin;
+    if (g-- > 1) {
+        e = e + 4;
+        Q = fopen(*(int*) e, "r");
+        if (!Q) {
+            fprintf(stderr, "otcc-ansi.c: could not open file %s\n", *(int*) e);
+            return -2;
+        }
+    }
+    D = strcpy(R = calloc(1, 99999), " int if else while break return for define main ") + 48;
+    v = calloc(1, 99999);
+    q = ac = calloc(1, 99999);
+    P = calloc(1, 99999);
+    o();
+    ad();
+    ab(0);
+    if (mprotect(ac & (~ 4095), (99999 + 4095) & (~ 4095), 7)) {
+        printf("Mprotect failed. %d\n", errno);
+        return -1;
+    }
+    fprintf(stderr, "otcc-ansi.c: About to execute compiled code:\n");
+    result = run(g, e);
+    fprintf(stderr, "atcc-ansi.c: result: %d\n", result);
+    return result;
+}
+
diff --git a/libacc/tests/data/otcc-noinclude.c b/libacc/tests/data/otcc-noinclude.c
new file mode 100644
index 0000000..530f9e2
--- /dev/null
+++ b/libacc/tests/data/otcc-noinclude.c
@@ -0,0 +1,446 @@
+// #include <stdio.h>
+#define k *(int*)
+#define a if(
+#define c ad()
+#define i else
+#define p while(
+#define x *(char*)
+#define b ==
+#define V =calloc(1,99999)
+#define f ()
+#define J return
+#define l ae(
+#define n e)
+#define u d!=
+#define F int 
+#define y (j)
+#define r m=
+#define t +4
+F d,z,C,h,P,K,ac,q,G,v,Q,R,D,L,W,M;
+E(n{
+x D++=e;
+}
+o f{
+a L){
+h=x L++;
+a h b 2){
+L=0;
+h=W;
+}
+}
+i h=fgetc(Q);
+}
+X f{
+J isalnum(h)|h b 95;
+}
+Y f{
+a h b 92){
+o f;
+a h b 110)h=10;
+}
+}
+c{
+F e,j,m;
+p isspace(h)|h b 35){
+a h b 35){
+o f;
+c;
+a d b 536){
+c;
+E(32);
+k d=1;
+k(d t)=D;
+}
+p h!=10){
+E(h);
+o f;
+}
+E(h);
+E(2);
+}
+o f;
+}
+C=0;
+d=h;
+a X f){
+E(32);
+M=D;
+p X f){
+E(h);
+o f;
+}
+a isdigit(d)){
+z=strtol(M,0,0);
+d=2;
+}
+i{
+x D=32;
+d=strstr(R,M-1)-R;
+x D=0;
+d=d*8+256;
+a d>536){
+d=P+d;
+a k d b 1){
+L=k(d t);
+W=h;
+o f;
+c;
+}
+}
+}
+}
+i{
+o f;
+a d b 39){
+d=2;
+Y f;
+z=h;
+o f;
+o f;
+}
+i a d b 47&h b 42){
+o f;
+p h){
+p h!=42)o f;
+o f;
+a h b 47)h=0;
+}
+o f;
+c;
+}
+i{
+e="++#m--%am*@R<^1c/@%[_[H3c%@%[_[H3c+@.B#d-@%:_^BKd<<Z/03e>>`/03e<=0f>=/f<@.f>@1f==&g!='g&&k||#l&@.BCh^@.BSi|@.B+j~@/%Yd!@&d*@b";
+p j=x e++){
+r x e++;
+z=0;
+p(C=x e++-98)<0)z=z*64+C+64;
+a j b d&(m b h|m b 64)){
+a m b h){
+o f;
+d=1;
+}
+break;
+}
+}
+}
+}
+}
+l g){
+p g&&g!=-1){
+x q++=g;
+g=g>>8;
+}
+}
+A(n{
+F g;
+p n{
+g=k e;
+k e=q-e-4;
+e=g;
+}
+}
+s(g,n{
+l g);
+k q=e;
+e=q;
+q=q t;
+J e;
+}
+H(n{
+s(184,n;
+}
+B(n{
+J s(233,n;
+}
+S(j,n{
+l 1032325);
+J s(132+j,n;
+}
+Z(n{
+l 49465);
+H(0);
+l 15);
+l e+144);
+l 192);
+}
+N(j,n{
+l j+131);
+s((e<512)<<7|5,n;
+}
+T y{
+F g,e,m,aa;
+g=1;
+a d b 34){
+H(v);
+p h!=34){
+Y f;
+x v++=h;
+o f;
+}
+x v=0;
+v=v t&-4;
+o f;
+c;
+}
+i{
+aa=C;
+r z;
+e=d;
+c;
+a e b 2){
+H(m);
+}
+i a aa b 2){
+T(0);
+s(185,0);
+a e b 33)Z(m);
+i l m);
+}
+i a e b 40){
+w f;
+c;
+}
+i a e b 42){
+c;
+e=d;
+c;
+c;
+a d b 42){
+c;
+c;
+c;
+c;
+e=0;
+}
+c;
+T(0);
+a d b 61){
+c;
+l 80);
+w f;
+l 89);
+l 392+(e b 256));
+}
+i a n{
+a e b 256)l 139);
+i l 48655);
+q++;
+}
+}
+i a e b 38){
+N(10,k d);
+c;
+}
+i{
+g=k e;
+a!g)g=dlsym(0,M);
+a d b 61&j){
+c;
+w f;
+N(6,g);
+}
+i a u 40){
+N(8,g);
+a C b 11){
+N(0,g);
+l z);
+c;
+}
+}
+}
+}
+a d b 40){
+a g b 1)l 80);
+r s(60545,0);
+c;
+j=0;
+p u 41){
+w f;
+s(2393225,j);
+a d b 44)c;
+j=j t;
+}
+k r j;
+c;
+a!g){
+e=e t;
+k e=s(232,k n;
+}
+i a g b 1){
+s(2397439,j);
+j=j t;
+}
+i{
+s(232,g-q-5);
+}
+a j)s(50305,j);
+}
+}
+O y{
+F e,g,m;
+a j--b 1)T(1);
+i{
+O y;
+r 0;
+p j b C){
+g=d;
+e=z;
+c;
+a j>8){
+r S(e,m);
+O y;
+}
+i{
+l 80);
+O y;
+l 89);
+a j b 4|j b 5){
+Z(n;
+}
+i{
+l n;
+a g b 37)l 146);
+}
+}
+}
+a m&&j>8){
+r S(e,m);
+H(e^1);
+B(5);
+A(m);
+H(n;
+}
+}
+}
+w f{
+O(11);
+}
+U f{
+w f;
+J S(0,0);
+}
+I y{
+F m,g,e;
+a d b 288){
+c;
+c;
+r U f;
+c;
+I y;
+a d b 312){
+c;
+g=B(0);
+A(m);
+I y;
+A(g);
+}
+i{
+A(m);
+}
+}
+i a d b 352|d b 504){
+e=d;
+c;
+c;
+a e b 352){
+g=q;
+r U f;
+}
+i{
+a u 59)w f;
+c;
+g=q;
+r 0;
+a u 59)r U f;
+c;
+a u 41){
+e=B(0);
+w f;
+B(g-q-5);
+A(n;
+g=e t;
+}
+}
+c;
+I(&m);
+B(g-q-5);
+A(m);
+}
+i a d b 123){
+c;
+ab(1);
+p u 125)I y;
+c;
+}
+i{
+a d b 448){
+c;
+a u 59)w f;
+K=B(K);
+}
+i a d b 400){
+c;
+k j=B(k j);
+}
+i a u 59)w f;
+c;
+}
+}
+ab y{
+F m;
+p d b 256|u-1&!j){
+a d b 256){
+c;
+p u 59){
+a j){
+G=G t;
+k d=-G;
+}
+i{
+k d=v;
+v=v t;
+}
+c;
+a d b 44)c;
+}
+c;
+}
+i{
+A(k(d t));
+k d=q;
+c;
+c;
+r 8;
+p u 41){
+k d=m;
+r m t;
+c;
+a d b 44)c;
+}
+c;
+K=G=0;
+l 15042901);
+r s(60545,0);
+I(0);
+A(K);
+l 50121);
+k r G;
+}
+}
+}
+main(g,n{
+Q=stdin;
+a g-->1){
+e=e t;
+Q=fopen(k e,"r");
+}
+D=strcpy(R V," int if else while break return for define main ")+48;
+v V;
+q=ac V;
+P V;
+o f;
+c;
+ab(0);
+J(*(int(*)f)k(P+592))(g,n;
+}
+
diff --git a/libacc/tests/data/otcc.c b/libacc/tests/data/otcc.c
new file mode 100644
index 0000000..433ae2e
--- /dev/null
+++ b/libacc/tests/data/otcc.c
@@ -0,0 +1,448 @@
+#include <stdio.h>
+#define k *(int*)
+#define a if(
+#define c ad()
+#define i else
+#define p while(
+#define x *(char*)
+#define b ==
+#define V =calloc(1,99999)
+#define f ()
+#define J return
+#define l ae(
+#define n e)
+#define u d!=
+#define F int 
+#define y (j)
+#define r m=
+#define t +4
+F d,z,C,h,P,K,ac,q,G,v,Q,R,D,L,W,M;
+E(n{
+x D++=e;
+}
+o f{
+a L){
+h=x L++;
+a h b 2){
+L=0;
+h=W;
+}
+}
+i h=fgetc(Q);
+}
+X f{
+J isalnum(h)|h b 95;
+}
+Y f{
+a h b 92){
+o f;
+a h b 110)h=10;
+}
+}
+c{
+F e,j,m;
+p isspace(h)|h b 35){
+a h b 35){
+o f;
+c;
+a d b 536){
+c;
+E(32);
+k d=1;
+k(d t)=D;
+}
+p h!=10){
+E(h);
+o f;
+}
+E(h);
+E(2);
+}
+o f;
+}
+C=0;
+d=h;
+a X f){
+E(32);
+M=D;
+p X f){
+E(h);
+o f;
+}
+a isdigit(d)){
+z=strtol(M,0,0);
+d=2;
+}
+i{
+x D=32;
+d=strstr(R,M-1)-R;
+x D=0;
+d=d*8+256;
+a d>536){
+d=P+d;
+a k d b 1){
+L=k(d t);
+W=h;
+o f;
+c;
+}
+}
+}
+}
+i{
+o f;
+a d b 39){
+d=2;
+Y f;
+z=h;
+o f;
+o f;
+}
+i a d b 47&h b 42){
+o f;
+p h){
+p h!=42)o f;
+o f;
+a h b 47)h=0;
+}
+o f;
+c;
+}
+i{
+e="++#m--%am*@R<^1c/@%[_[H3c%@%[_[H3c+@.B#d-@%:_^BKd<<Z/03e>>`/03e<=0f>=/f<@.f>@1f==&g!='g&&k||#l&@.BCh^@.BSi|@.B+j~@/%Yd!@&d*@b";
+p j=x e++){
+r x e++;
+z=0;
+p(C=x e++-98)<0)z=z*64+C+64;
+a j b d&(m b h|m b 64)){
+a m b h){
+o f;
+d=1;
+}
+break;
+}
+}
+}
+}
+}
+l g){
+p g&&g!=-1){
+x q++=g;
+g=g>>8;
+}
+}
+A(n{
+F g;
+p n{
+g=k e;
+k e=q-e-4;
+e=g;
+}
+}
+s(g,n{
+l g);
+k q=e;
+e=q;
+q=q t;
+J e;
+}
+H(n{
+s(184,n;
+}
+B(n{
+J s(233,n;
+}
+S(j,n{
+l 1032325);
+J s(132+j,n;
+}
+Z(n{
+l 49465);
+H(0);
+l 15);
+l e+144);
+l 192);
+}
+N(j,n{
+l j+131);
+s((e<512)<<7|5,n;
+}
+T y{
+F g,e,m,aa;
+g=1;
+a d b 34){
+H(v);
+p h!=34){
+Y f;
+x v++=h;
+o f;
+}
+x v=0;
+v=v t&-4;
+o f;
+c;
+}
+i{
+aa=C;
+r z;
+e=d;
+c;
+a e b 2){
+H(m);
+}
+i a aa b 2){
+T(0);
+s(185,0);
+a e b 33)Z(m);
+i l m);
+}
+i a e b 40){
+w f;
+c;
+}
+i a e b 42){
+c;
+e=d;
+c;
+c;
+a d b 42){
+c;
+c;
+c;
+c;
+e=0;
+}
+c;
+T(0);
+a d b 61){
+c;
+l 80);
+w f;
+l 89);
+l 392+(e b 256));
+}
+i a n{
+a e b 256)l 139);
+i l 48655);
+q++;
+}
+}
+i a e b 38){
+N(10,k d);
+c;
+}
+i{
+g=k e;
+a!g)g=dlsym(0,M);
+a d b 61&j){
+c;
+w f;
+N(6,g);
+}
+i a u 40){
+N(8,g);
+a C b 11){
+N(0,g);
+l z);
+c;
+}
+}
+}
+}
+a d b 40){
+a g b 1)l 80);
+r s(60545,0);
+c;
+j=0;
+p u 41){
+w f;
+s(2393225,j);
+a d b 44)c;
+j=j t;
+}
+k r j;
+c;
+a!g){
+e=e t;
+k e=s(232,k n;
+}
+i a g b 1){
+s(2397439,j);
+j=j t;
+}
+i{
+s(232,g-q-5);
+}
+a j)s(50305,j);
+}
+}
+O y{
+F e,g,m;
+a j--b 1)T(1);
+i{
+O y;
+r 0;
+p j b C){
+g=d;
+e=z;
+c;
+a j>8){
+r S(e,m);
+O y;
+}
+i{
+l 80);
+O y;
+l 89);
+a j b 4|j b 5){
+Z(n;
+}
+i{
+l n;
+a g b 37)l 146);
+}
+}
+}
+a m&&j>8){
+r S(e,m);
+H(e^1);
+B(5);
+A(m);
+H(n;
+}
+}
+}
+w f{
+O(11);
+}
+U f{
+w f;
+J S(0,0);
+}
+I y{
+F m,g,e;
+a d b 288){
+c;
+c;
+r U f;
+c;
+I y;
+a d b 312){
+c;
+g=B(0);
+A(m);
+I y;
+A(g);
+}
+i{
+A(m);
+}
+}
+i a d b 352|d b 504){
+e=d;
+c;
+c;
+a e b 352){
+g=q;
+r U f;
+}
+i{
+a u 59)w f;
+c;
+g=q;
+r 0;
+a u 59)r U f;
+c;
+a u 41){
+e=B(0);
+w f;
+B(g-q-5);
+A(n;
+g=e t;
+}
+}
+c;
+I(&m);
+B(g-q-5);
+A(m);
+}
+i a d b 123){
+c;
+ab(1);
+p u 125)I y;
+c;
+}
+i{
+a d b 448){
+c;
+a u 59)w f;
+K=B(K);
+}
+i a d b 400){
+c;
+k j=B(k j);
+}
+i a u 59)w f;
+c;
+}
+}
+ab y{
+F m;
+p d b 256|u-1&!j){
+a d b 256){
+c;
+p u 59){
+a j){
+G=G t;
+k d=-G;
+}
+i{
+k d=v;
+v=v t;
+}
+c;
+a d b 44)c;
+}
+c;
+}
+i{
+A(k(d t));
+k d=q;
+c;
+c;
+r 8;
+p u 41){
+k d=m;
+r m t;
+c;
+a d b 44)c;
+}
+c;
+K=G=0;
+l 15042901);
+r s(60545,0);
+I(0);
+A(K);
+l 50121);
+k r G;
+}
+}
+}
+main(g,n{
+Q=stdin;
+a g-->1){
+e=e t;
+Q=fopen(k e,"r");
+}
+D=strcpy(R V," int if else while break return for define main ")+48;
+v V;
+q=ac V;
+P V;
+o f;
+c;
+ab(0);
+mprotect(ac & (~ 4095), (99999 + 4095) & (~ 4095), 7);
+fprintf(stderr, "otcc.c: about to execute compiled code.\n");
+J(*(int(*)f)k(P+592))(g,n;
+}
+
diff --git a/libacc/tests/data/pointers.c b/libacc/tests/data/pointers.c
new file mode 100644
index 0000000..461ebeb
--- /dev/null
+++ b/libacc/tests/data/pointers.c
@@ -0,0 +1,15 @@
+int main() {
+    int* pa = (int*) malloc(100);
+    int* pb = pa + 1;
+    int* pc = (int*) 0;
+    *pa = 1;
+    *pb = 2;
+    printf("Pointer difference: %d %d\n", pb - pa, ((int) pb) - ((int) pa));
+    int c = * (pa + 1);
+    printf("Pointer addition: %d\n", c);
+    printf("Pointer comparison to zero: %d %d %d\n", pa == 0, pb == 0, pc == 0);
+    printf("Pointer comparison: %d %d %d %d %d\n", pa < pb, pa == pb, pa > pb, ! pb, ! pc);
+    free(pa);
+    return 0;
+}
+
diff --git a/libacc/tests/data/pointers2.c b/libacc/tests/data/pointers2.c
new file mode 100644
index 0000000..69e402f
--- /dev/null
+++ b/libacc/tests/data/pointers2.c
@@ -0,0 +1,35 @@
+// Test multiple levels of indirection
+
+void testsingle() {
+    int a = 0;
+    int* pa = &a;
+    printf("a = %d, *pa = %d\n", a, *pa);
+    *pa = 2;
+    printf("a = %d, *pa = %d\n", a, *pa);
+}
+
+void testdouble() {
+    int a = 0;
+    int* pa = &a;
+    int** ppa = &pa;
+    printf("a = %d, *pa = %d **ppa = %d\n", a, *pa, **ppa);
+    **ppa = 2;
+    printf("a = %d, *pa = %d **ppa = %d\n", a, *pa, **ppa);
+}
+
+void testtripple() {
+    int a = 0;
+    int* pa = &a;
+    int** ppa = &pa;
+    int*** pppa = &ppa;
+    printf("a = %d, *pa = %d **ppa = %d\n ***pppa = %d", a, *pa, **ppa, ***pppa);
+    ***pppa = 2;
+    printf("a = %d, *pa = %d **ppa = %d\n ***pppa = %d", a, *pa, **ppa, ***pppa);
+}
+
+int main() {
+    testsingle();
+    testdouble();
+    testdouble();
+    return 0;
+}
diff --git a/libacc/tests/data/returnval-ansi.c b/libacc/tests/data/returnval-ansi.c
new file mode 100644
index 0000000..6b53fd5
--- /dev/null
+++ b/libacc/tests/data/returnval-ansi.c
@@ -0,0 +1,8 @@
+
+int main(int argc, char** argv) {
+  return f();
+}
+
+int f() {
+    return 42;
+}
diff --git a/libacc/tests/data/returnval.c b/libacc/tests/data/returnval.c
new file mode 100644
index 0000000..1cf5bae
--- /dev/null
+++ b/libacc/tests/data/returnval.c
@@ -0,0 +1,4 @@
+main() {
+  return 42;
+}
+
diff --git a/libacc/tests/data/rollo3.c b/libacc/tests/data/rollo3.c
new file mode 100644
index 0000000..b21c12f
--- /dev/null
+++ b/libacc/tests/data/rollo3.c
@@ -0,0 +1,9 @@
+
+float fabsf(float);
+
+int main(void* con, int ft, int launchID)
+{
+   float f =  fabsf(-10.0f);
+   return f;
+}
+
diff --git a/libacc/tests/data/short.c b/libacc/tests/data/short.c
new file mode 100644
index 0000000..5e222f3
--- /dev/null
+++ b/libacc/tests/data/short.c
@@ -0,0 +1,6 @@
+short a = 3;
+int main() {
+    short* b = &a;
+    *b = *b - 5;
+    return a;
+}
diff --git a/libacc/tests/data/simplest.c b/libacc/tests/data/simplest.c
new file mode 100644
index 0000000..bae895a
--- /dev/null
+++ b/libacc/tests/data/simplest.c
@@ -0,0 +1 @@
+main() {}
diff --git a/libacc/tests/data/structs.c b/libacc/tests/data/structs.c
new file mode 100644
index 0000000..dd81af3
--- /dev/null
+++ b/libacc/tests/data/structs.c
@@ -0,0 +1,95 @@
+// struct definition and declaration
+struct a {
+    int a;
+    int b;
+} c;
+
+// Useless, but legal struct declaration
+struct {
+    int x;
+};
+
+// Useful anonymous struct declaration
+struct {
+    int y;
+} anon1, anon2;
+
+// forward declarations
+struct a;
+struct b;
+struct c;
+
+struct b {int a; int b; };
+
+// struct c {b g; }; // syntax error.
+
+// struct s {float c,a,b,c;} s; // duplicate struct member
+
+struct c {struct b g; };
+
+// struct a { int w; }; // error
+
+void testCopying() {
+    struct a {int a[10]; char c;} a, b;
+    a.c = 37;
+    b.c = 38;
+    b = a;
+    printf("testCopying: %d == %d\n", a.c, b.c);
+}
+
+void testUnion() {
+    union u;
+    union u {float f;int i;} u;
+    u.f = 1.0f;
+    printf("testUnion: %g == 0x%08x\n", u.f, u.i);
+}
+
+struct v {float x, y, z, w; };
+
+void add(struct v* result, struct v* a, struct v* b) {
+    result->x = a->x + b->x;
+    result->y = a->y + b->y;
+    result->z = a->z + b->z;
+    result->w = a->w + b->w;
+}
+
+void set(struct v* v, float x, float y, float z, float w) {
+    v->x = x;
+    v->y = y;
+    v->z = z;
+    v->w = w;
+}
+
+void print(struct v* v) {
+    printf("(%g, %g, %g, %g)\n", v->x, v->y, v->z, v->w);
+}
+
+void testArgs() {
+    struct v a, b, c;
+    set(&a, 1.0f, 2.0f, 3.0f, 4.0f);
+    set(&b, 5.0f, 6.0f, 7.0f, 8.0f);
+    add(&c, &a, &b);
+    printf("testArgs: ");
+    print(&c);
+}
+
+int main() {
+    anon1.y = 3;
+    anon2.y = anon1.y;
+
+    testCopying();
+    testUnion();
+    testArgs();
+
+    struct c cc;
+    cc.g.a = 3;
+    c.a = 1;
+    c.b = 3;
+    struct a {int x, y; } z;
+    // struct a {int x, y; } z2;
+    z.x = c.a;
+    struct a *pA;
+    pA = &z;
+    pA->x += 5;
+    return pA->x;
+}
diff --git a/libacc/tests/data/testStringConcat.c b/libacc/tests/data/testStringConcat.c
new file mode 100644
index 0000000..bf06ae1
--- /dev/null
+++ b/libacc/tests/data/testStringConcat.c
@@ -0,0 +1,4 @@
+int main() {
+    return printf("Hello" "," " world\n");
+}
+
diff --git a/libacc/tests/disassem.cpp b/libacc/tests/disassem.cpp
new file mode 100644
index 0000000..ac35342
--- /dev/null
+++ b/libacc/tests/disassem.cpp
@@ -0,0 +1,711 @@
+/*	$NetBSD: disassem.c,v 1.14 2003/03/27 16:58:36 mycroft Exp $	*/
+
+/*-
+ * Copyright (c) 1996 Mark Brinicombe.
+ * Copyright (c) 1996 Brini.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Brini.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * RiscBSD kernel project
+ *
+ * db_disasm.c
+ *
+ * Kernel disassembler
+ *
+ * Created      : 10/02/96
+ *
+ * Structured after the sparc/sparc/db_disasm.c by David S. Miller &
+ * Paul Kranenburg
+ *
+ * This code is not complete. Not all instructions are disassembled.
+ */
+
+#include <sys/cdefs.h>
+//__FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/arm/arm/disassem.c,v 1.2 2005/01/05 21:58:47 imp Exp $");
+#include <sys/param.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "disassem.h"
+#include "armreg.h"
+//#include <ddb/ddb.h>
+
+/*
+ * General instruction format
+ *
+ *	insn[cc][mod]	[operands]
+ *
+ * Those fields with an uppercase format code indicate that the field
+ * follows directly after the instruction before the separator i.e.
+ * they modify the instruction rather than just being an operand to
+ * the instruction. The only exception is the writeback flag which
+ * follows a operand.
+ *
+ *
+ * 2 - print Operand 2 of a data processing instruction
+ * d - destination register (bits 12-15)
+ * n - n register (bits 16-19)
+ * s - s register (bits 8-11)
+ * o - indirect register rn (bits 16-19) (used by swap)
+ * m - m register (bits 0-3)
+ * a - address operand of ldr/str instruction
+ * e - address operand of ldrh/strh instruction
+ * l - register list for ldm/stm instruction
+ * f - 1st fp operand (register) (bits 12-14)
+ * g - 2nd fp operand (register) (bits 16-18)
+ * h - 3rd fp operand (register/immediate) (bits 0-4)
+ * b - branch address
+ * t - thumb branch address (bits 24, 0-23)
+ * k - breakpoint comment (bits 0-3, 8-19)
+ * X - block transfer type
+ * Y - block transfer type (r13 base)
+ * c - comment field bits(0-23)
+ * p - saved or current status register
+ * F - PSR transfer fields
+ * D - destination-is-r15 (P) flag on TST, TEQ, CMP, CMN
+ * L - co-processor transfer size
+ * S - set status flag
+ * P - fp precision
+ * Q - fp precision (for ldf/stf)
+ * R - fp rounding
+ * v - co-processor data transfer registers + addressing mode
+ * W - writeback flag
+ * x - instruction in hex
+ * # - co-processor number
+ * y - co-processor data processing registers
+ * z - co-processor register transfer registers
+ */
+
+struct arm32_insn {
+	u_int mask;
+	u_int pattern;
+	const char* name;
+	const char* format;
+};
+
+static const struct arm32_insn arm32_i[] = {
+    { 0x0fffffff, 0x0ff00000, "imb",	"c" },		/* Before swi */
+    { 0x0fffffff, 0x0ff00001, "imbrange",	"c" },	/* Before swi */
+    { 0x0f000000, 0x0f000000, "swi",	"c" },
+    { 0xfe000000, 0xfa000000, "blx",	"t" },		/* Before b and bl */
+    { 0x0f000000, 0x0a000000, "b",	"b" },
+    { 0x0f000000, 0x0b000000, "bl",	"b" },
+    { 0x0fe000f0, 0x00000090, "mul",	"Snms" },
+    { 0x0fe000f0, 0x00200090, "mla",	"Snmsd" },
+    { 0x0fe000f0, 0x00800090, "umull",	"Sdnms" },
+    { 0x0fe000f0, 0x00c00090, "smull",	"Sdnms" },
+    { 0x0fe000f0, 0x00a00090, "umlal",	"Sdnms" },
+    { 0x0fe000f0, 0x00e00090, "smlal",	"Sdnms" },
+    { 0x0d700000, 0x04200000, "strt",	"daW" },
+    { 0x0d700000, 0x04300000, "ldrt",	"daW" },
+    { 0x0d700000, 0x04600000, "strbt",	"daW" },
+    { 0x0d700000, 0x04700000, "ldrbt",	"daW" },
+    { 0x0c500000, 0x04000000, "str",	"daW" },
+    { 0x0c500000, 0x04100000, "ldr",	"daW" },
+    { 0x0c500000, 0x04400000, "strb",	"daW" },
+    { 0x0c500000, 0x04500000, "ldrb",	"daW" },
+    { 0x0e1f0000, 0x080d0000, "stm",	"YnWl" },/* separate out r13 base */
+    { 0x0e1f0000, 0x081d0000, "ldm",	"YnWl" },/* separate out r13 base */    
+    { 0x0e100000, 0x08000000, "stm",	"XnWl" },
+    { 0x0e100000, 0x08100000, "ldm",	"XnWl" },    
+    { 0x0e1000f0, 0x00100090, "ldrb",	"deW" },
+    { 0x0e1000f0, 0x00000090, "strb",	"deW" },
+    { 0x0e1000f0, 0x001000d0, "ldrsb",	"deW" },
+    { 0x0e1000f0, 0x001000b0, "ldrh",	"deW" },
+    { 0x0e1000f0, 0x000000b0, "strh",	"deW" },
+    { 0x0e1000f0, 0x001000f0, "ldrsh",	"deW" },
+    { 0x0f200090, 0x00200090, "und",	"x" },	/* Before data processing */
+    { 0x0e1000d0, 0x000000d0, "und",	"x" },	/* Before data processing */
+    { 0x0ff00ff0, 0x01000090, "swp",	"dmo" },
+    { 0x0ff00ff0, 0x01400090, "swpb",	"dmo" },
+    { 0x0fbf0fff, 0x010f0000, "mrs",	"dp" },	/* Before data processing */
+    { 0x0fb0fff0, 0x0120f000, "msr",	"pFm" },/* Before data processing */
+    { 0x0fb0f000, 0x0320f000, "msr",	"pF2" },/* Before data processing */
+    { 0x0ffffff0, 0x012fff10, "bx",     "m" },
+    { 0x0fff0ff0, 0x016f0f10, "clz",	"dm" },
+    { 0x0ffffff0, 0x012fff30, "blx",	"m" },
+    { 0xfff000f0, 0xe1200070, "bkpt",	"k" },
+    { 0x0de00000, 0x00000000, "and",	"Sdn2" },
+    { 0x0de00000, 0x00200000, "eor",	"Sdn2" },
+    { 0x0de00000, 0x00400000, "sub",	"Sdn2" },
+    { 0x0de00000, 0x00600000, "rsb",	"Sdn2" },
+    { 0x0de00000, 0x00800000, "add",	"Sdn2" },
+    { 0x0de00000, 0x00a00000, "adc",	"Sdn2" },
+    { 0x0de00000, 0x00c00000, "sbc",	"Sdn2" },
+    { 0x0de00000, 0x00e00000, "rsc",	"Sdn2" },
+    { 0x0df00000, 0x01100000, "tst",	"Dn2" },
+    { 0x0df00000, 0x01300000, "teq",	"Dn2" },
+    { 0x0df00000, 0x01500000, "cmp",	"Dn2" },
+    { 0x0df00000, 0x01700000, "cmn",	"Dn2" },
+    { 0x0de00000, 0x01800000, "orr",	"Sdn2" },
+    { 0x0de00000, 0x01a00000, "mov",	"Sd2" },
+    { 0x0de00000, 0x01c00000, "bic",	"Sdn2" },
+    { 0x0de00000, 0x01e00000, "mvn",	"Sd2" },
+    { 0x0ff08f10, 0x0e000100, "adf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e100100, "muf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e200100, "suf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e300100, "rsf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e400100, "dvf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e500100, "rdf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e600100, "pow",	"PRfgh" },
+    { 0x0ff08f10, 0x0e700100, "rpw",	"PRfgh" },
+    { 0x0ff08f10, 0x0e800100, "rmf",	"PRfgh" },
+    { 0x0ff08f10, 0x0e900100, "fml",	"PRfgh" },
+    { 0x0ff08f10, 0x0ea00100, "fdv",	"PRfgh" },
+    { 0x0ff08f10, 0x0eb00100, "frd",	"PRfgh" },
+    { 0x0ff08f10, 0x0ec00100, "pol",	"PRfgh" },
+    { 0x0f008f10, 0x0e000100, "fpbop",	"PRfgh" },
+    { 0x0ff08f10, 0x0e008100, "mvf",	"PRfh" },
+    { 0x0ff08f10, 0x0e108100, "mnf",	"PRfh" },
+    { 0x0ff08f10, 0x0e208100, "abs",	"PRfh" },
+    { 0x0ff08f10, 0x0e308100, "rnd",	"PRfh" },
+    { 0x0ff08f10, 0x0e408100, "sqt",	"PRfh" },
+    { 0x0ff08f10, 0x0e508100, "log",	"PRfh" },
+    { 0x0ff08f10, 0x0e608100, "lgn",	"PRfh" },
+    { 0x0ff08f10, 0x0e708100, "exp",	"PRfh" },
+    { 0x0ff08f10, 0x0e808100, "sin",	"PRfh" },
+    { 0x0ff08f10, 0x0e908100, "cos",	"PRfh" },
+    { 0x0ff08f10, 0x0ea08100, "tan",	"PRfh" },
+    { 0x0ff08f10, 0x0eb08100, "asn",	"PRfh" },
+    { 0x0ff08f10, 0x0ec08100, "acs",	"PRfh" },
+    { 0x0ff08f10, 0x0ed08100, "atn",	"PRfh" },
+    { 0x0f008f10, 0x0e008100, "fpuop",	"PRfh" },
+    { 0x0e100f00, 0x0c000100, "stf",	"QLv" },
+    { 0x0e100f00, 0x0c100100, "ldf",	"QLv" },
+    { 0x0ff00f10, 0x0e000110, "flt",	"PRgd" },
+    { 0x0ff00f10, 0x0e100110, "fix",	"PRdh" },
+    { 0x0ff00f10, 0x0e200110, "wfs",	"d" },
+    { 0x0ff00f10, 0x0e300110, "rfs",	"d" },
+    { 0x0ff00f10, 0x0e400110, "wfc",	"d" },
+    { 0x0ff00f10, 0x0e500110, "rfc",	"d" },
+    { 0x0ff0ff10, 0x0e90f110, "cmf",	"PRgh" },
+    { 0x0ff0ff10, 0x0eb0f110, "cnf",	"PRgh" },
+    { 0x0ff0ff10, 0x0ed0f110, "cmfe",	"PRgh" },
+    { 0x0ff0ff10, 0x0ef0f110, "cnfe",	"PRgh" },
+    { 0xff100010, 0xfe000010, "mcr2",	"#z" },
+    { 0x0f100010, 0x0e000010, "mcr",	"#z" },
+    { 0xff100010, 0xfe100010, "mrc2",	"#z" },
+    { 0x0f100010, 0x0e100010, "mrc",	"#z" },
+    { 0xff000010, 0xfe000000, "cdp2",	"#y" },
+    { 0x0f000010, 0x0e000000, "cdp",	"#y" },
+    { 0xfe100090, 0xfc100000, "ldc2",	"L#v" },
+    { 0x0e100090, 0x0c100000, "ldc",	"L#v" },
+    { 0xfe100090, 0xfc000000, "stc2",	"L#v" },
+    { 0x0e100090, 0x0c000000, "stc",	"L#v" },
+    { 0xf550f000, 0xf550f000, "pld",	"ne" },
+    { 0x0ff00ff0, 0x01000050, "qaad",	"dmn" },
+    { 0x0ff00ff0, 0x01400050, "qdaad",	"dmn" },
+    { 0x0ff00ff0, 0x01600050, "qdsub",	"dmn" },
+    { 0x0ff00ff0, 0x01200050, "dsub",	"dmn" },
+    { 0x0ff000f0, 0x01000080, "smlabb",	"nmsd" },   // d & n inverted!!
+    { 0x0ff000f0, 0x010000a0, "smlatb",	"nmsd" },   // d & n inverted!!
+    { 0x0ff000f0, 0x010000c0, "smlabt",	"nmsd" },   // d & n inverted!!
+    { 0x0ff000f0, 0x010000e0, "smlatt",	"nmsd" },   // d & n inverted!!
+    { 0x0ff000f0, 0x01400080, "smlalbb","ndms" },   // d & n inverted!!
+    { 0x0ff000f0, 0x014000a0, "smlaltb","ndms" },   // d & n inverted!!
+    { 0x0ff000f0, 0x014000c0, "smlalbt","ndms" },   // d & n inverted!!
+    { 0x0ff000f0, 0x014000e0, "smlaltt","ndms" },   // d & n inverted!!
+    { 0x0ff000f0, 0x01200080, "smlawb", "nmsd" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x012000a0, "smulwb","nms" },   // d & n inverted!!
+    { 0x0ff000f0, 0x012000c0, "smlawt", "nmsd" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x012000e0, "smulwt","nms" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x01600080, "smulbb","nms" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x016000a0, "smultb","nms" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x016000c0, "smulbt","nms" },   // d & n inverted!!
+    { 0x0ff0f0f0, 0x016000e0, "smultt","nms" },   // d & n inverted!!
+    { 0x00000000, 0x00000000, NULL,	NULL }
+};
+
+static char const arm32_insn_conditions[][4] = {
+	"eq", "ne", "cs", "cc",
+	"mi", "pl", "vs", "vc",
+	"hi", "ls", "ge", "lt",
+	"gt", "le", "",   "nv"
+};
+
+static char const insn_block_transfers[][4] = {
+	"da", "ia", "db", "ib"
+};
+
+static char const insn_stack_block_transfers[][4] = {
+	"ed", "ea", "fd", "fa"
+};
+
+static char const op_shifts[][4] = {
+	"lsl", "lsr", "asr", "ror"
+};
+
+static char const insn_fpa_rounding[][2] = {
+	"", "p", "m", "z"
+};
+
+static char const insn_fpa_precision[][2] = {
+	"s", "d", "e", "p"
+};
+
+static char const insn_fpaconstants[][8] = {
+	"0.0", "1.0", "2.0", "3.0",
+	"4.0", "5.0", "0.5", "10.0"
+};
+
+#define insn_condition(x)	arm32_insn_conditions[(x >> 28) & 0x0f]
+#define insn_blktrans(x)	insn_block_transfers[(x >> 23) & 3]
+#define insn_stkblktrans(x)	insn_stack_block_transfers[(x >> 23) & 3]
+#define op2_shift(x)		op_shifts[(x >> 5) & 3]
+#define insn_fparnd(x)		insn_fpa_rounding[(x >> 5) & 0x03]
+#define insn_fpaprec(x)		insn_fpa_precision[(((x >> 18) & 2)|(x >> 7)) & 1]
+#define insn_fpaprect(x)	insn_fpa_precision[(((x >> 21) & 2)|(x >> 15)) & 1]
+#define insn_fpaimm(x)		insn_fpaconstants[x & 0x07]
+
+/* Local prototypes */
+static void disasm_register_shift(const disasm_interface_t *di, u_int insn);
+static void disasm_print_reglist(const disasm_interface_t *di, u_int insn);
+static void disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn,
+    u_int loc);
+static void disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn,
+    u_int loc);
+static void disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn,
+    u_int loc);
+static u_int disassemble_readword(u_int address);
+static void disassemble_printaddr(u_int address);
+
+u_int
+disasm(const disasm_interface_t *di, u_int loc, int altfmt)
+{
+	const struct arm32_insn *i_ptr = &arm32_i[0];
+
+	u_int insn;
+	int matchp;
+	int branch;
+	const char* f_ptr;
+	int fmt;
+
+	fmt = 0;
+	matchp = 0;
+	insn = di->di_readword(loc);
+
+/*	di->di_printf("loc=%08x insn=%08x : ", loc, insn);*/
+
+	while (i_ptr->name) {
+		if ((insn & i_ptr->mask) ==  i_ptr->pattern) {
+			matchp = 1;
+			break;
+		}
+		i_ptr++;
+	}
+
+	if (!matchp) {
+		di->di_printf("und%s\t%08x\n", insn_condition(insn), insn);
+		return(loc + INSN_SIZE);
+	}
+
+	/* If instruction forces condition code, don't print it. */
+	if ((i_ptr->mask & 0xf0000000) == 0xf0000000)
+		di->di_printf("%s", i_ptr->name);
+	else
+		di->di_printf("%s%s", i_ptr->name, insn_condition(insn));
+
+	f_ptr = i_ptr->format;
+
+	/* Insert tab if there are no instruction modifiers */
+
+	if (*(f_ptr) < 'A' || *(f_ptr) > 'Z') {
+		++fmt;
+		di->di_printf("\t");
+	}
+
+	while (*f_ptr) {
+		switch (*f_ptr) {
+		/* 2 - print Operand 2 of a data processing instruction */
+		case '2':
+			if (insn & 0x02000000) {
+				int rotate= ((insn >> 7) & 0x1e);
+
+				di->di_printf("#0x%08x",
+					      (insn & 0xff) << (32 - rotate) |
+					      (insn & 0xff) >> rotate);
+			} else {  
+				disasm_register_shift(di, insn);
+			}
+			break;
+		/* d - destination register (bits 12-15) */
+		case 'd':
+			di->di_printf("r%d", ((insn >> 12) & 0x0f));
+			break;
+		/* D - insert 'p' if Rd is R15 */
+		case 'D':
+			if (((insn >> 12) & 0x0f) == 15)
+				di->di_printf("p");
+			break;
+		/* n - n register (bits 16-19) */
+		case 'n':
+			di->di_printf("r%d", ((insn >> 16) & 0x0f));
+			break;
+		/* s - s register (bits 8-11) */
+		case 's':
+			di->di_printf("r%d", ((insn >> 8) & 0x0f));
+			break;
+		/* o - indirect register rn (bits 16-19) (used by swap) */
+		case 'o':
+			di->di_printf("[r%d]", ((insn >> 16) & 0x0f));
+			break;
+		/* m - m register (bits 0-4) */
+		case 'm':
+			di->di_printf("r%d", ((insn >> 0) & 0x0f));
+			break;
+		/* a - address operand of ldr/str instruction */
+		case 'a':
+			disasm_insn_ldrstr(di, insn, loc);
+			break;
+		/* e - address operand of ldrh/strh instruction */
+		case 'e':
+			disasm_insn_ldrhstrh(di, insn, loc);
+			break;
+		/* l - register list for ldm/stm instruction */
+		case 'l':
+			disasm_print_reglist(di, insn);
+			break;
+		/* f - 1st fp operand (register) (bits 12-14) */
+		case 'f':
+			di->di_printf("f%d", (insn >> 12) & 7);
+			break;
+		/* g - 2nd fp operand (register) (bits 16-18) */
+		case 'g':
+			di->di_printf("f%d", (insn >> 16) & 7);
+			break;
+		/* h - 3rd fp operand (register/immediate) (bits 0-4) */
+		case 'h':
+			if (insn & (1 << 3))
+				di->di_printf("#%s", insn_fpaimm(insn));
+			else
+				di->di_printf("f%d", insn & 7);
+			break;
+		/* b - branch address */
+		case 'b':
+			branch = ((insn << 2) & 0x03ffffff);
+			if (branch & 0x02000000)
+				branch |= 0xfc000000;
+			di->di_printaddr(loc + 8 + branch);
+			break;
+		/* t - blx address */
+		case 't':
+			branch = ((insn << 2) & 0x03ffffff) |
+			    (insn >> 23 & 0x00000002);
+			if (branch & 0x02000000)
+				branch |= 0xfc000000;
+			di->di_printaddr(loc + 8 + branch);
+			break;
+		/* X - block transfer type */
+		case 'X':
+			di->di_printf("%s", insn_blktrans(insn));
+			break;
+		/* Y - block transfer type (r13 base) */
+		case 'Y':
+			di->di_printf("%s", insn_stkblktrans(insn));
+			break;
+		/* c - comment field bits(0-23) */
+		case 'c':
+			di->di_printf("0x%08x", (insn & 0x00ffffff));
+			break;
+		/* k - breakpoint comment (bits 0-3, 8-19) */
+		case 'k':
+			di->di_printf("0x%04x",
+			    (insn & 0x000fff00) >> 4 | (insn & 0x0000000f));
+			break;
+		/* p - saved or current status register */
+		case 'p':
+			if (insn & 0x00400000)
+				di->di_printf("spsr");
+			else
+				di->di_printf("cpsr");
+			break;
+		/* F - PSR transfer fields */
+		case 'F':
+			di->di_printf("_");
+			if (insn & (1 << 16))
+				di->di_printf("c");
+			if (insn & (1 << 17))
+				di->di_printf("x");
+			if (insn & (1 << 18))
+				di->di_printf("s");
+			if (insn & (1 << 19))
+				di->di_printf("f");
+			break;
+		/* B - byte transfer flag */
+		case 'B':
+			if (insn & 0x00400000)
+				di->di_printf("b");
+			break;
+		/* L - co-processor transfer size */
+		case 'L':
+			if (insn & (1 << 22))
+				di->di_printf("l");
+			break;
+		/* S - set status flag */
+		case 'S':
+			if (insn & 0x00100000)
+				di->di_printf("s");
+			break;
+		/* P - fp precision */
+		case 'P':
+			di->di_printf("%s", insn_fpaprec(insn));
+			break;
+		/* Q - fp precision (for ldf/stf) */
+		case 'Q':
+			break;
+		/* R - fp rounding */
+		case 'R':
+			di->di_printf("%s", insn_fparnd(insn));
+			break;
+		/* W - writeback flag */
+		case 'W':
+			if (insn & (1 << 21))
+				di->di_printf("!");
+			break;
+		/* # - co-processor number */
+		case '#':
+			di->di_printf("p%d", (insn >> 8) & 0x0f);
+			break;
+		/* v - co-processor data transfer registers+addressing mode */
+		case 'v':
+			disasm_insn_ldcstc(di, insn, loc);
+			break;
+		/* x - instruction in hex */
+		case 'x':
+			di->di_printf("0x%08x", insn);
+			break;
+		/* y - co-processor data processing registers */
+		case 'y':
+			di->di_printf("%d, ", (insn >> 20) & 0x0f);
+
+			di->di_printf("c%d, c%d, c%d", (insn >> 12) & 0x0f,
+			    (insn >> 16) & 0x0f, insn & 0x0f);
+
+			di->di_printf(", %d", (insn >> 5) & 0x07);
+			break;
+		/* z - co-processor register transfer registers */
+		case 'z':
+			di->di_printf("%d, ", (insn >> 21) & 0x07);
+			di->di_printf("r%d, c%d, c%d, %d",
+			    (insn >> 12) & 0x0f, (insn >> 16) & 0x0f,
+			    insn & 0x0f, (insn >> 5) & 0x07);
+
+/*			if (((insn >> 5) & 0x07) != 0)
+				di->di_printf(", %d", (insn >> 5) & 0x07);*/
+			break;
+		default:
+			di->di_printf("[%c - unknown]", *f_ptr);
+			break;
+		}
+		if (*(f_ptr+1) >= 'A' && *(f_ptr+1) <= 'Z')
+			++f_ptr;
+		else if (*(++f_ptr)) {
+			++fmt;
+			if (fmt == 1)
+				di->di_printf("\t");
+			else
+				di->di_printf(", ");
+		}
+	};
+
+	di->di_printf("\n");
+
+	return(loc + INSN_SIZE);
+}
+
+
+static void
+disasm_register_shift(const disasm_interface_t *di, u_int insn)
+{
+	di->di_printf("r%d", (insn & 0x0f));
+	if ((insn & 0x00000ff0) == 0)
+		;
+	else if ((insn & 0x00000ff0) == 0x00000060)
+		di->di_printf(", rrx");
+	else {
+		if (insn & 0x10)
+			di->di_printf(", %s r%d", op2_shift(insn),
+			    (insn >> 8) & 0x0f);
+		else
+			di->di_printf(", %s #%d", op2_shift(insn),
+			    (insn >> 7) & 0x1f);
+	}
+}
+
+
+static void
+disasm_print_reglist(const disasm_interface_t *di, u_int insn)
+{
+	int loop;
+	int start;
+	int comma;
+
+	di->di_printf("{");
+	start = -1;
+	comma = 0;
+
+	for (loop = 0; loop < 17; ++loop) {
+		if (start != -1) {
+			if (loop == 16 || !(insn & (1 << loop))) {
+				if (comma)
+					di->di_printf(", ");
+				else
+					comma = 1;
+        			if (start == loop - 1)
+        				di->di_printf("r%d", start);
+        			else
+        				di->di_printf("r%d-r%d", start, loop - 1);
+        			start = -1;
+        		}
+        	} else {
+        		if (insn & (1 << loop))
+        			start = loop;
+        	}
+        }
+	di->di_printf("}");
+
+	if (insn & (1 << 22))
+		di->di_printf("^");
+}
+
+static void
+disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn, u_int loc)
+{
+	int offset;
+
+	offset = insn & 0xfff;
+	if ((insn & 0x032f0000) == 0x010f0000) {
+		/* rA = pc, immediate index */
+		if (insn & 0x00800000)
+			loc += offset;
+		else
+			loc -= offset;
+		di->di_printaddr(loc + 8);
+ 	} else {
+		di->di_printf("[r%d", (insn >> 16) & 0x0f);
+		if ((insn & 0x03000fff) != 0x01000000) {
+			di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
+			if (!(insn & 0x00800000))
+				di->di_printf("-");
+			if (insn & (1 << 25))
+				disasm_register_shift(di, insn);
+			else
+				di->di_printf("#0x%03x", offset);
+		}
+		if (insn & (1 << 24))
+			di->di_printf("]");
+	}
+}
+
+static void
+disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn, u_int loc)
+{
+	int offset;
+
+	offset = ((insn & 0xf00) >> 4) | (insn & 0xf);
+	if ((insn & 0x004f0000) == 0x004f0000) {
+		/* rA = pc, immediate index */
+		if (insn & 0x00800000)
+			loc += offset;
+		else
+			loc -= offset;
+		di->di_printaddr(loc + 8);
+ 	} else {
+		di->di_printf("[r%d", (insn >> 16) & 0x0f);
+		if ((insn & 0x01400f0f) != 0x01400000) {
+			di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
+			if (!(insn & 0x00800000))
+				di->di_printf("-");
+			if (insn & (1 << 22))
+				di->di_printf("#0x%02x", offset);
+			else
+				di->di_printf("r%d", (insn & 0x0f));
+		}
+		if (insn & (1 << 24))
+			di->di_printf("]");
+	}
+}
+
+static void
+disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn, u_int loc)
+{
+	if (((insn >> 8) & 0xf) == 1)
+		di->di_printf("f%d, ", (insn >> 12) & 0x07);
+	else
+		di->di_printf("c%d, ", (insn >> 12) & 0x0f);
+
+	di->di_printf("[r%d", (insn >> 16) & 0x0f);
+
+	di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
+
+	if (!(insn & (1 << 23)))
+		di->di_printf("-");
+
+	di->di_printf("#0x%03x", (insn & 0xff) << 2);
+
+	if (insn & (1 << 24))
+		di->di_printf("]");
+
+	if (insn & (1 << 21))
+		di->di_printf("!");
+}
+
+static u_int
+disassemble_readword(u_int address)
+{
+	return(*((u_int *)address));
+}
+
+static void
+disassemble_printaddr(u_int address)
+{
+	printf("0x%08x", address);
+}
+
+static void
+disassemble_printf(const char *fmt, ...) {
+	va_list ap;
+	va_start(ap, fmt);
+	vprintf(fmt, ap);
+	va_end(ap);
+}
+
+static const disasm_interface_t disassemble_di = {
+	disassemble_readword, disassemble_printaddr, disassemble_printf
+};
+
+void
+disassemble(u_int address)
+{
+
+	(void)disasm(&disassemble_di, address, 0);
+}
+
+/* End of disassem.c */
diff --git a/libacc/tests/disassem.h b/libacc/tests/disassem.h
new file mode 100644
index 0000000..02747cd
--- /dev/null
+++ b/libacc/tests/disassem.h
@@ -0,0 +1,65 @@
+/*	$NetBSD: disassem.h,v 1.4 2001/03/04 04:15:58 matt Exp $	*/
+
+/*-
+ * Copyright (c) 1997 Mark Brinicombe.
+ * Copyright (c) 1997 Causality Limited.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Mark Brinicombe.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Define the interface structure required by the disassembler.
+ *
+ * $FreeBSD: /repoman/r/ncvs/src/sys/arm/include/disassem.h,v 1.2 2005/01/05 21:58:48 imp Exp $
+ */
+
+#ifndef ANDROID_MACHINE_DISASSEM_H
+#define ANDROID_MACHINE_DISASSEM_H
+
+#include <sys/types.h>
+
+#if __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+	u_int	(*di_readword)(u_int);
+	void	(*di_printaddr)(u_int);	
+	void	(*di_printf)(const char *, ...);
+} disasm_interface_t;
+
+/* Prototypes for callable functions */
+
+u_int disasm(const disasm_interface_t *, u_int, int);
+void disassemble(u_int);
+
+#if __cplusplus
+}
+#endif
+
+#endif /* !ANDROID_MACHINE_DISASSEM_H */
diff --git a/libacc/tests/main.cpp b/libacc/tests/main.cpp
new file mode 100644
index 0000000..e4e386f
--- /dev/null
+++ b/libacc/tests/main.cpp
@@ -0,0 +1,207 @@
+/*
+ * Android "Almost" C Compiler.
+ * This is a compiler for a small subset of the C language, intended for use
+ * in scripting environments where speed and memory footprint are important.
+ *
+ * This code is based upon the "unobfuscated" version of the
+ * Obfuscated Tiny C compiler, see the file LICENSE for details.
+ *
+ */
+
+#include <ctype.h>
+#include <dlfcn.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__arm__)
+#include <unistd.h>
+#endif
+
+#if defined(__arm__)
+#define PROVIDE_ARM_DISASSEMBLY
+#endif
+
+#ifdef PROVIDE_ARM_DISASSEMBLY
+#include "disassem.h"
+#endif
+
+#include <acc/acc.h>
+
+
+typedef int (*MainPtr)(int, char**);
+// This is a separate function so it can easily be set by breakpoint in gdb.
+int run(MainPtr mainFunc, int argc, char** argv) {
+    return mainFunc(argc, argv);
+}
+
+ACCvoid* symbolLookup(ACCvoid* pContext, const ACCchar* name) {
+    return (ACCvoid*) dlsym(RTLD_DEFAULT, name);
+}
+
+#ifdef PROVIDE_ARM_DISASSEMBLY
+
+static FILE* disasmOut;
+
+static u_int
+disassemble_readword(u_int address)
+{
+    return(*((u_int *)address));
+}
+
+static void
+disassemble_printaddr(u_int address)
+{
+    fprintf(disasmOut, "0x%08x", address);
+}
+
+static void
+disassemble_printf(const char *fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(disasmOut, fmt, ap);
+    va_end(ap);
+}
+
+static int disassemble(ACCscript* script, FILE* out) {
+    disasmOut = out;
+    disasm_interface_t  di;
+    di.di_readword = disassemble_readword;
+    di.di_printaddr = disassemble_printaddr;
+    di.di_printf = disassemble_printf;
+
+    ACCvoid* base;
+    ACCsizei length;
+
+    accGetProgramBinary(script, &base, &length);
+    unsigned long* pBase = (unsigned long*) base;
+    unsigned long* pEnd = (unsigned long*) (((unsigned char*) base) + length);
+
+    for(unsigned long* pInstruction = pBase; pInstruction < pEnd; pInstruction++) {
+        fprintf(out, "%08x: %08x  ", (int) pInstruction, (int) *pInstruction);
+        ::disasm(&di, (uint) pInstruction, 0);
+    }
+    return 0;
+}
+
+#endif // PROVIDE_ARM_DISASSEMBLY
+
+int main(int argc, char** argv) {
+    const char* inFile = NULL;
+    bool printListing;
+    bool runResults = false;
+    FILE* in = stdin;
+    int i;
+    for (i = 1; i < argc; i++) {
+        char* arg = argv[i];
+        if (arg[0] == '-') {
+            switch (arg[1]) {
+                case 'S':
+                    printListing = true;
+                    break;
+                case 'R':
+                    runResults = true;
+                    break;
+            default:
+                fprintf(stderr, "Unrecognized flag %s\n", arg);
+                return 3;
+            }
+        } else if (inFile == NULL) {
+            inFile = arg;
+        } else {
+            break;
+        }
+    }
+
+    if (! inFile) {
+        fprintf(stderr, "input file required\n");
+        return 2;
+    }
+
+    if (inFile) {
+        in = fopen(inFile, "r");
+        if (!in) {
+            fprintf(stderr, "Could not open input file %s\n", inFile);
+            return 1;
+        }
+    }
+
+    fseek(in, 0, SEEK_END);
+    size_t fileSize = (size_t) ftell(in);
+    rewind(in);
+    ACCchar* text = new ACCchar[fileSize + 1];
+    size_t bytesRead = fread(text, 1, fileSize, in);
+    if (bytesRead != fileSize) {
+        fprintf(stderr, "Could not read all of file %s\n", inFile);
+    }
+
+    text[fileSize] = '\0';
+
+    ACCscript* script = accCreateScript();
+
+    const ACCchar* scriptSource[] = {text};
+    accScriptSource(script, 1, scriptSource, NULL);
+    delete[] text;
+
+    accRegisterSymbolCallback(script, symbolLookup, NULL);
+
+    accCompileScript(script);
+    int result = accGetError(script);
+    MainPtr mainPointer = 0;
+    if (result != 0) {
+        ACCsizei bufferLength;
+        accGetScriptInfoLog(script, 0, &bufferLength, NULL);
+        char* buf = (char*) malloc(bufferLength + 1);
+        if (buf != NULL) {
+            accGetScriptInfoLog(script, bufferLength + 1, NULL, buf);
+            fprintf(stderr, "%s", buf);
+            free(buf);
+        } else {
+            fprintf(stderr, "Out of memory.\n");
+        }
+        goto exit;
+    }
+
+    {
+        ACCsizei numPragmaStrings;
+        accGetPragmas(script, &numPragmaStrings, 0, NULL);
+        if (numPragmaStrings) {
+            char** strings = new char*[numPragmaStrings];
+            accGetPragmas(script, NULL, numPragmaStrings, strings);
+            for(ACCsizei i = 0; i < numPragmaStrings; i += 2) {
+                fprintf(stderr, "#pragma %s(%s)\n", strings[i], strings[i+1]);
+            }
+            delete[] strings;
+        }
+    }
+
+    if (printListing) {
+#ifdef PROVIDE_ARM_DISASSEMBLY
+        disassemble(script, stderr);
+#endif
+    }
+
+    if (runResults) {
+        accGetScriptLabel(script, "main", (ACCvoid**) & mainPointer);
+
+        result = accGetError(script);
+        if (result != ACC_NO_ERROR) {
+            fprintf(stderr, "Could not find main: %d\n", result);
+        } else {
+            fprintf(stderr, "Executing compiled code:\n");
+            int codeArgc = argc - i + 1;
+            char** codeArgv = argv + i - 1;
+            codeArgv[0] = (char*) (inFile ? inFile : "stdin");
+            result = run(mainPointer, codeArgc, codeArgv);
+            fprintf(stderr, "result: %d\n", result);
+        }
+    }
+
+exit:
+
+    accDeleteScript(script);
+
+    return result;
+}
diff --git a/libacc/tests/runtimeTest.cpp b/libacc/tests/runtimeTest.cpp
new file mode 100644
index 0000000..55bf877
--- /dev/null
+++ b/libacc/tests/runtimeTest.cpp
@@ -0,0 +1,118 @@
+/*
+ * RuntimeTest for ACC compiler.
+ *
+ */
+
+#include <ctype.h>
+#include <dlfcn.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__arm__)
+#include <unistd.h>
+#endif
+
+#include <acc/acc.h>
+
+
+typedef void (*ScriptPtr)();
+
+// This is a separate function so it can easily be set by breakpoint in gdb.
+void run(ScriptPtr scriptFn) {
+    scriptFn();
+}
+
+// Private API for development:
+
+extern "C"
+void accDisassemble(ACCscript* script);
+
+int globalVar;
+
+void op_int(int a) {
+    printf("op_int(%d)\n", a);
+}
+
+void op_float12(float a, float b, float c, float d,
+                float e, float f, float g, float h,
+                float i, float j, float k, float l) {
+    printf("op_float12(%g, %g, %g, %g, %g, %g, %g, %g, %g, %g, %g, %g)\n",
+           a, b, c, d, e, f, g, h, i, j, k, l);
+}
+
+const char* text = "void op_int(int a);\n"
+    "void op_float12(float a, float b, float c, float d,\n"
+    "           float e, float f, float g, float h,\n"
+    "           float i, float j, float k, float l);\n"
+    "void script() {\n"
+    "  globalVar += 3;\n"
+    "  op_int(123);\n"
+    "  op_float12(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0);\n"
+    "}\n";
+
+ACCvoid* symbolLookup(ACCvoid* pContext, const ACCchar* name) {
+    if (strcmp("op_int", name) == 0) {
+        return (ACCvoid*) op_int;
+    }
+    if (strcmp("op_float12", name) == 0) {
+        return (ACCvoid*) op_float12;
+    }
+    if (strcmp("globalVar", name) == 0) {
+        return (ACCvoid*) &globalVar;
+    }
+    return (ACCvoid*) dlsym(RTLD_DEFAULT, name);
+}
+
+int main(int argc, char** argv) {
+    ACCscript* script = accCreateScript();
+
+    accRegisterSymbolCallback(script, symbolLookup, NULL);
+
+    const ACCchar* scriptSource[] = {text};
+    accScriptSource(script, 1, scriptSource, NULL);
+
+    accCompileScript(script);
+    int result = accGetError(script);
+    ScriptPtr scriptPointer = 0;
+    if (result != 0) {
+        char buf[1024];
+        accGetScriptInfoLog(script, sizeof(buf), NULL, buf);
+        fprintf(stderr, "%s", buf);
+        goto exit;
+    }
+
+    {
+        ACCsizei numPragmaStrings;
+        accGetPragmas(script, &numPragmaStrings, 0, NULL);
+        if (numPragmaStrings) {
+            char** strings = new char*[numPragmaStrings];
+            accGetPragmas(script, NULL, numPragmaStrings, strings);
+            for(ACCsizei i = 0; i < numPragmaStrings; i += 2) {
+                fprintf(stderr, "#pragma %s(%s)\n", strings[i], strings[i+1]);
+            }
+            delete[] strings;
+        }
+    }
+
+    accGetScriptLabel(script, "script", (ACCvoid**) & scriptPointer);
+
+    result = accGetError(script);
+    if (result != ACC_NO_ERROR) {
+        fprintf(stderr, "Could not find script: %d\n", result);
+    } else {
+        fprintf(stderr, "Executing script:\n");
+        globalVar = 17;
+        run(scriptPointer);
+        fprintf(stderr, "After script globalVar = %d\n", globalVar);
+    }
+
+
+exit:
+
+    accDeleteScript(script);
+
+    return result;
+}
diff --git a/libacc/tests/test b/libacc/tests/test
new file mode 100755
index 0000000..8fd6916
--- /dev/null
+++ b/libacc/tests/test
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+SCRIPT_DIR=`dirname $BASH_SOURCE`
+cd $SCRIPT_DIR
+python test.py "$@"
+
diff --git a/libacc/tests/test.py b/libacc/tests/test.py
new file mode 100644
index 0000000..d984301
--- /dev/null
+++ b/libacc/tests/test.py
@@ -0,0 +1,493 @@
+#
+# Test the acc compiler
+
+import unittest
+import subprocess
+import os
+import sys
+
+gArmInitialized = False
+gUseArm = True
+gUseX86 = True
+gRunOTCCOutput = True
+
+
+def parseArgv():
+    global gUseArm
+    global gUseX86
+    global gRunOTCCOutput
+    for arg in sys.argv[1:]:
+        if arg == "--noarm":
+            print "--noarm: not testing ARM"
+            gUseArm = False
+        elif arg == "--nox86":
+            print "--nox86: not testing x86"
+            gUseX86 = False
+        elif arg == "--norunotcc":
+            print "--norunotcc detected, not running OTCC output"
+            gRunOTCCOutput = False
+        else:
+            print "Unknown parameter: ", arg
+            raise "Unknown parameter"
+    sys.argv = sys.argv[0:1]
+
+def compile(args):
+    proc = subprocess.Popen(["acc"] + args, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+    result = proc.communicate()
+    return result
+
+def runCmd(args):
+    proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    result = proc.communicate()
+    return result[0].strip()
+
+def uname():
+    return runCmd(["uname"])
+
+def unameM():
+    return runCmd(["uname", "-m"])
+
+def which(item):
+    return runCmd(["which", item])
+
+def fileType(item):
+    return runCmd(["file", item])
+
+def outputCanRun():
+    ft = fileType(which("acc"))
+    return ft.find("ELF 32-bit LSB executable, Intel 80386") >= 0
+
+def checkEnvironment():
+    global gRunOTCCOutput
+    gRunOTCCOutput = uname() == "Linux" and unameM() != "x86_64" and outputCanRun()
+
+def adb(args):
+    return runCmd(["adb"] + args)
+
+def setupArm():
+    global gArmInitialized
+    if gArmInitialized:
+        return
+    print "Setting up arm"
+    adb(["remount"])
+    adb(["shell", "rm", "/system/bin/acc"])
+    adb(["shell", "mkdir", "/system/bin/accdata"])
+    adb(["shell", "mkdir", "/system/bin/accdata/data"])
+    # Clear out old data TODO: handle recursion
+    adb(["shell", "rm", "/system/bin/accdata/data/*"])
+    # Copy over data
+    for root, dirs, files in os.walk("data"):
+        for d in dirs:
+            adb(["shell", "mkdir", os.path.join(root, d)])
+        for f in files:
+            adb(["push", os.path.join(root, f), os.path.join("/system/bin/accdata", root, f)])
+    # Copy over compiler
+    adb(["sync"])
+    gArmInitialized = True
+
+def compileArm(args):
+    setupArm()
+    proc = subprocess.Popen(["adb", "shell", "/system/bin/acc"] + args, stdout=subprocess.PIPE)
+    result = proc.communicate()
+    return result[0].replace("\r","")
+
+def compare(a, b):
+    if a != b:
+        firstDiff = firstDifference(a, b)
+        print "Strings differ at character %d. Common: %s. Difference '%s' != '%s'" % (
+            firstDiff, a[0:firstDiff], safeAccess(a, firstDiff), safeAccess(b, firstDiff))
+
+def safeAccess(s, i):
+    if 0 <= i < len(s):
+        return s[i]
+    else:
+        return '?'
+
+def firstDifference(a, b):
+    commonLen = min(len(a), len(b))
+    for i in xrange(0, commonLen):
+        if a[i] != b[i]:
+            return i
+    return commonLen
+
+# a1 and a2 are the expected stdout and stderr.
+# b1 and b2 are the actual stdout and stderr.
+# Compare the two, sets. Allow any individual line
+# to appear in either stdout or stderr. This is because
+# the way we obtain output on the ARM combines both
+# streams into one sequence.
+
+def compareOuput(a1,a2,b1,b2):
+    while True:
+        totalLen = len(a1) + len(a2) + len(b1) + len(b2)
+        a1, b1 = matchCommon(a1, b1)
+        a1, b2 = matchCommon(a1, b2)
+        a2, b1 = matchCommon(a2, b1)
+        a2, b2 = matchCommon(a2, b2)
+        newTotalLen = len(a1) + len(a2) + len(b1) + len(b2)
+        if newTotalLen == 0:
+            return True
+        if newTotalLen == totalLen:
+            print "Failed at %d %d %d %d" % (len(a1), len(a2), len(b1), len(b2))
+            print "a1", a1
+            print "a2", a2
+            print "b1", b1
+            print "b2", b2
+            return False
+
+def matchCommon(a, b):
+    """Remove common items from the beginning of a and b,
+       return just the tails that are different."""
+    while len(a) > 0 and len(b) > 0 and a[0] == b[0]:
+        a = a[1:]
+        b = b[1:]
+    return a, b
+
+def rewritePaths(args):
+    return [rewritePath(x) for x in args]
+
+def rewritePath(p):
+    """Take a path that's correct on the x86 and convert to a path
+       that's correct on ARM."""
+    if p.startswith("data/"):
+        p = "/system/bin/accdata/" + p
+    return p
+
+class TestACC(unittest.TestCase):
+
+    def checkResult(self, out, err, stdErrResult, stdOutResult=""):
+        a1 = out.splitlines()
+        a2 = err.splitlines()
+        b2 = stdErrResult.splitlines()
+        b1 = stdOutResult.splitlines()
+        self.assertEqual(True, compareOuput(a1,a2,b1,b2))
+
+    def compileCheck(self, args, stdErrResult, stdOutResult="",
+                     targets=['arm', 'x86']):
+        global gUseArm
+        global gUseX86
+        targetSet = frozenset(targets)
+        if gUseX86 and 'x86' in targetSet:
+            out, err = compile(args)
+            self.checkResult(out, err, stdErrResult, stdOutResult)
+        if gUseArm and 'arm' in targetSet:
+            out = compileArm(rewritePaths(args))
+            self.checkResult(out, "", stdErrResult, stdOutResult)
+
+    def compileCheckArm(self, args, result):
+        self.assertEqual(compileArm(args), result)
+
+    def testCompileReturnVal(self):
+        self.compileCheck(["data/returnval-ansi.c"], "")
+
+    def testCompileOTCCANSII(self):
+        self.compileCheck(["data/otcc-ansi.c"], "", "", ['x86'])
+
+    def testRunReturnVal(self):
+        self.compileCheck(["-R", "data/returnval-ansi.c"],
+        "Executing compiled code:\nresult: 42\n")
+
+    def testStringLiteralConcatenation(self):
+        self.compileCheck(["-R", "data/testStringConcat.c"],
+        "Executing compiled code:\nresult: 13\n", "Hello, world\n")
+
+    def testRunOTCCANSI(self):
+        global gRunOTCCOutput
+        if gRunOTCCOutput:
+            self.compileCheck(["-R", "data/otcc-ansi.c", "data/returnval.c"],
+                "Executing compiled code:\notcc-ansi.c: About to execute compiled code:\natcc-ansi.c: result: 42\nresult: 42\n", "",
+                 ['x86'])
+
+    def testRunOTCCANSI2(self):
+        global gRunOTCCOutput
+        if gRunOTCCOutput:
+            self.compileCheck(["-R", "data/otcc-ansi.c", "data/otcc.c", "data/returnval.c"],
+                "Executing compiled code:\notcc-ansi.c: About to execute compiled code:\notcc.c: about to execute compiled code.\natcc-ansi.c: result: 42\nresult: 42\n", "",['x86'])
+
+    def testRunConstants(self):
+        self.compileCheck(["-R", "data/constants.c"],
+            "Executing compiled code:\nresult: 12\n",
+            "0 = 0\n010 = 8\n0x10 = 16\n'\\a' = 7\n'\\b' = 8\n'\\f' = 12\n'\\n' = 10\n'\\r' = 13\n'\\t' = 9\n'\\v' = 11\n'\\\\' = 92\n'\\'' = 39\n" +
+            "'\\\"' = 34\n'\\?' = 63\n'\\0' = 0\n'\\1' = 1\n'\\12' = 10\n'\\123' = 83\n'\\x0' = 0\n'\\x1' = 1\n'\\x12' = 18\n'\\x123' = 291\n'\\x1f' = 31\n'\\x1F' = 31\n")
+
+    def testRunFloat(self):
+        self.compileCheck(["-R", "data/float.c"],
+            "Executing compiled code:\nresult: 0\n",
+            """Constants: 0 0 0 0.01 0.01 0.1 10 10 0.1
+int: 1 float: 2.2 double: 3.3
+ ftoi(1.4f)=1
+ dtoi(2.4)=2
+ itof(3)=3
+ itod(4)=4
+globals: 1 2 3 4
+args: 1 2 3 4
+locals: 1 2 3 4
+cast rval: 2 4
+cast lval: 1.1 2 3.3 4
+""")
+
+    def testRunFlops(self):
+        self.compileCheck(["-R", "data/flops.c"],
+            """Executing compiled code:
+result: 0""",
+"""-1.1 = -1.1
+!1.2 = 0
+!0 = 1
+double op double:
+1 + 2 = 3
+1 - 2 = -1
+1 * 2 = 2
+1 / 2 = 0.5
+float op float:
+1 + 2 = 3
+1 - 2 = -1
+1 * 2 = 2
+1 / 2 = 0.5
+double op float:
+1 + 2 = 3
+1 - 2 = -1
+1 * 2 = 2
+1 / 2 = 0.5
+double op int:
+1 + 2 = 3
+1 - 2 = -1
+1 * 2 = 2
+1 / 2 = 0.5
+int op double:
+1 + 2 = 3
+1 - 2 = -1
+1 * 2 = 2
+1 / 2 = 0.5
+double op double:
+1 op 2: < 1   <= 1   == 0   >= 0   > 0   != 1
+1 op 1: < 0   <= 1   == 1   >= 1   > 0   != 0
+2 op 1: < 0   <= 0   == 0   >= 1   > 1   != 1
+double op float:
+1 op 2: < 1   <= 1   == 0   >= 0   > 0   != 1
+1 op 1: < 0   <= 1   == 1   >= 1   > 0   != 0
+2 op 1: < 0   <= 0   == 0   >= 1   > 1   != 1
+float op float:
+1 op 2: < 1   <= 1   == 0   >= 0   > 0   != 1
+1 op 1: < 0   <= 1   == 1   >= 1   > 0   != 0
+2 op 1: < 0   <= 0   == 0   >= 1   > 1   != 1
+int op double:
+1 op 2: < 1   <= 1   == 0   >= 0   > 0   != 1
+1 op 1: < 0   <= 1   == 1   >= 1   > 0   != 0
+2 op 1: < 0   <= 0   == 0   >= 1   > 1   != 1
+double op int:
+1 op 2: < 1   <= 1   == 0   >= 0   > 0   != 1
+1 op 1: < 0   <= 1   == 1   >= 1   > 0   != 0
+2 op 1: < 0   <= 0   == 0   >= 1   > 1   != 1
+branching: 1 0 1
+testpassi: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassf: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassd: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassi: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassf: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassd: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassi: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassf: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassd: 1 2 3 4 5 6 7 8 9 10 11 12
+testpassidf: 1 2 3
+""")
+    def testCasts(self):
+        self.compileCheck(["-R", "data/casts.c"],
+            """Executing compiled code:
+result: 0""", """Reading from a pointer: 3 3
+Writing to a pointer: 4
+Testing casts: 3 3 4.5 4
+Testing reading (int*): 4
+Testing writing (int*): 8 9
+Testing reading (char*): 0x78 0x56 0x34 0x12
+Testing writing (char*): 0x87654321
+f(10)
+Function pointer result: 70
+Testing read/write (float*): 8.8 9.9
+Testing read/write (double*): 8.8 9.9
+""")
+
+    def testChar(self):
+        self.compileCheck(["-R", "data/char.c"], """Executing compiled code:
+result: 0""", """a = 99, b = 41
+ga = 100, gb = 44""")
+
+    def testPointerArithmetic(self):
+        self.compileCheck(["-R", "data/pointers.c"], """Executing compiled code:
+result: 0""", """Pointer difference: 1 4
+Pointer addition: 2
+Pointer comparison to zero: 0 0 1
+Pointer comparison: 1 0 0 0 1
+""")
+    def testRollo3(self):
+        self.compileCheck(["-R", "data/rollo3.c"], """Executing compiled code:
+result: 10""", """""")
+
+    def testFloatDouble(self):
+        self.compileCheck(["-R", "data/floatdouble.c"], """Executing compiled code:
+result: 0""", """0.002 0.1 10""")
+
+    def testIncDec(self):
+        self.compileCheck(["-R", "data/inc.c"], """Executing compiled code:
+0
+1
+2
+1
+1
+2
+1
+0
+result: 0
+""","""""")
+
+    def testIops(self):
+        self.compileCheck(["-R", "data/iops.c"], """Executing compiled code:
+result: 0""", """Literals: 1 -1
+++
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+--
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
+0
+""")
+
+    def testFilm(self):
+        self.compileCheck(["-R", "data/film.c"], """Executing compiled code:
+result: 0""", """testing...
+Total bad: 0
+""")
+
+    def testpointers2(self):
+        self.compileCheck(["-R", "data/pointers2.c"], """Executing compiled code:
+result: 0""", """a = 0, *pa = 0
+a = 2, *pa = 2
+a = 0, *pa = 0 **ppa = 0
+a = 2, *pa = 2 **ppa = 2
+a = 0, *pa = 0 **ppa = 0
+a = 2, *pa = 2 **ppa = 2
+""")
+
+    def testassignmentop(self):
+        self.compileCheck(["-R", "data/assignmentop.c"], """Executing compiled code:
+result: 0""", """2 *= 5  10
+20 /= 5  4
+17 %= 5  2
+17 += 5  22
+17 -= 5  12
+17<<= 1  34
+17>>= 1  8
+17&= 1  1
+17^= 1  16
+16|= 1  17
+*f() = *f() + 10;
+f()
+f()
+a = 10
+*f() += 10;
+f()
+a = 10
+""")
+
+    def testcomma(self):
+        self.compileCheck(["-R", "data/comma.c"], """Executing compiled code:
+result: 0""", """statement: 10
+if: a = 0
+while: b = 11
+for: b = 22
+return: 30
+arg: 12
+""")
+
+    def testBrackets(self):
+        self.compileCheck(["-R", "data/brackets.c"], """Executing compiled code:
+Errors: 0
+2D Errors: 0
+result: 0
+""","""""")
+
+    def testShort(self):
+        self.compileCheck(["-R", "data/short.c"], """Executing compiled code:
+result: -2
+""","""""")
+
+    def testAssignment(self):
+        self.compileCheck(["-R", "data/assignment.c"], """Executing compiled code:
+result: 7
+""","""""")
+
+    def testArray(self):
+        self.compileCheck(["-R", "data/array.c"], """Executing compiled code:
+localInt: 3
+localDouble: 3 3
+globalChar: 3
+globalDouble: 3
+testArgs: 0 2 4
+testDecay: Hi!
+test2D:
+abcdefghijdefghijklm
+defghijklmghijklmnop
+ghijklmnopjklmnopabc
+jklmnopabcmnopabcdef
+mnopabcdefpabcdefghi
+pabcdefghicdefghijkl
+cdefghijklfghijklmno
+fghijklmnoijklmnopab
+ijklmnopablmnopabcde
+lmnopabcdefghijklmno
+result: 0
+""","""""")
+
+    def testDefines(self):
+        self.compileCheck(["-R", "data/defines.c"], """Executing compiled code:
+result: 3
+""","""""")
+
+    def testFuncArgs(self):
+        self.compileCheck(["-R", "data/funcargs.c"], """Executing compiled code:
+result: 4
+""","""""")
+
+    def testB2071670(self):
+        self.compileCheck(["-R", "data/b2071670.c"], """Executing compiled code:
+result: 1092616192
+""","""""")
+
+    def testStructs(self):
+        self.compileCheck(["-R", "data/structs.c"], """Executing compiled code:
+testCopying: 37 == 37
+testUnion: 1 == 0x3f800000
+testArgs: (6, 8, 10, 12)
+result: 6
+""","""""")
+
+    def testAddressOf(self):
+        self.compileCheck(["-R", "data/addressOf.c"], """Executing compiled code:
+testStruct: 10 10 10
+testArray: 1 1 1
+result: 0
+""","""""")
+
+def main():
+    checkEnvironment()
+    parseArgv()
+    unittest.main()
+
+if __name__ == '__main__':
+    main()
+