string/memory functions: avoid qemu bugs/performance issues.
Use V on real hardware, but GC on qemu.
Change-Id: I419546d94555540e14a14dcc52bd99413cbbcfa1
diff --git a/libc/arch-riscv64/static_function_dispatch.S b/libc/arch-riscv64/static_function_dispatch.S
new file mode 100644
index 0000000..accfec8
--- /dev/null
+++ b/libc/arch-riscv64/static_function_dispatch.S
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER 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.
+ */
+
+#include <private/bionic_asm.h>
+
+#define FUNCTION_DELEGATE(name, impl) \
+ENTRY(name); \
+ j impl; \
+END(name)
+
+// TODO: switch to the V variants when qemu is fixed.
+FUNCTION_DELEGATE(memchr, memchr_gc)
+FUNCTION_DELEGATE(memcmp, memcmp_gc)
+FUNCTION_DELEGATE(memcpy, memcpy_gc)
+FUNCTION_DELEGATE(memmove, memmove_gc)
+FUNCTION_DELEGATE(memset, memset_gc)
+FUNCTION_DELEGATE(stpcpy, stpcpy_gc)
+FUNCTION_DELEGATE(strcat, strcat_gc)
+FUNCTION_DELEGATE(strchr, strchr_gc)
+FUNCTION_DELEGATE(strcmp, strcmp_gc)
+FUNCTION_DELEGATE(strcpy, strcpy_gc)
+FUNCTION_DELEGATE(strlen, strlen_gc)
+FUNCTION_DELEGATE(strncat, strncat_gc)
+FUNCTION_DELEGATE(strncmp, strncmp_gc)
+FUNCTION_DELEGATE(strncpy, strncpy_gc)
+FUNCTION_DELEGATE(strnlen, strnlen_gc)