Initial Contribution
diff --git a/sh/arith.h b/sh/arith.h
new file mode 100644
index 0000000..f70c093
--- /dev/null
+++ b/sh/arith.h
@@ -0,0 +1,25 @@
+#define ARITH_NUM 258
+#define ARITH_LPAREN 259
+#define ARITH_RPAREN 260
+#define ARITH_OR 261
+#define ARITH_AND 262
+#define ARITH_BOR 263
+#define ARITH_BXOR 264
+#define ARITH_BAND 265
+#define ARITH_NE 266
+#define ARITH_EQ 267
+#define ARITH_LE 268
+#define ARITH_GE 269
+#define ARITH_GT 270
+#define ARITH_LT 271
+#define ARITH_RSHIFT 272
+#define ARITH_LSHIFT 273
+#define ARITH_SUB 274
+#define ARITH_ADD 275
+#define ARITH_REM 276
+#define ARITH_DIV 277
+#define ARITH_MUL 278
+#define ARITH_BNOT 279
+#define ARITH_NOT 280
+#define ARITH_UNARYPLUS 281
+#define ARITH_UNARYMINUS 282