Issue #4753: By enabling a configure option named '--with-computed-gotos'
on compilers that support it (notably: gcc, SunPro, icc), the bytecode
evaluation loop is compiled with a new dispatch mechanism which gives
speedups of up to 20%, depending on the system, on various benchmarks.
diff --git a/Python/opcode_targets.h b/Python/opcode_targets.h
new file mode 100644
index 0000000..c662717
--- /dev/null
+++ b/Python/opcode_targets.h
@@ -0,0 +1,258 @@
+static void *opcode_targets[256] = {
+ &&_unknown_opcode,
+ &&TARGET_POP_TOP,
+ &&TARGET_ROT_TWO,
+ &&TARGET_ROT_THREE,
+ &&TARGET_DUP_TOP,
+ &&TARGET_ROT_FOUR,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_NOP,
+ &&TARGET_UNARY_POSITIVE,
+ &&TARGET_UNARY_NEGATIVE,
+ &&TARGET_UNARY_NOT,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_UNARY_INVERT,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_BINARY_POWER,
+ &&TARGET_BINARY_MULTIPLY,
+ &&_unknown_opcode,
+ &&TARGET_BINARY_MODULO,
+ &&TARGET_BINARY_ADD,
+ &&TARGET_BINARY_SUBTRACT,
+ &&TARGET_BINARY_SUBSCR,
+ &&TARGET_BINARY_FLOOR_DIVIDE,
+ &&TARGET_BINARY_TRUE_DIVIDE,
+ &&TARGET_INPLACE_FLOOR_DIVIDE,
+ &&TARGET_INPLACE_TRUE_DIVIDE,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_STORE_MAP,
+ &&TARGET_INPLACE_ADD,
+ &&TARGET_INPLACE_SUBTRACT,
+ &&TARGET_INPLACE_MULTIPLY,
+ &&_unknown_opcode,
+ &&TARGET_INPLACE_MODULO,
+ &&TARGET_STORE_SUBSCR,
+ &&TARGET_DELETE_SUBSCR,
+ &&TARGET_BINARY_LSHIFT,
+ &&TARGET_BINARY_RSHIFT,
+ &&TARGET_BINARY_AND,
+ &&TARGET_BINARY_XOR,
+ &&TARGET_BINARY_OR,
+ &&TARGET_INPLACE_POWER,
+ &&TARGET_GET_ITER,
+ &&TARGET_STORE_LOCALS,
+ &&TARGET_PRINT_EXPR,
+ &&TARGET_LOAD_BUILD_CLASS,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_INPLACE_LSHIFT,
+ &&TARGET_INPLACE_RSHIFT,
+ &&TARGET_INPLACE_AND,
+ &&TARGET_INPLACE_XOR,
+ &&TARGET_INPLACE_OR,
+ &&TARGET_BREAK_LOOP,
+ &&TARGET_WITH_CLEANUP,
+ &&_unknown_opcode,
+ &&TARGET_RETURN_VALUE,
+ &&TARGET_IMPORT_STAR,
+ &&_unknown_opcode,
+ &&TARGET_YIELD_VALUE,
+ &&TARGET_POP_BLOCK,
+ &&TARGET_END_FINALLY,
+ &&TARGET_POP_EXCEPT,
+ &&TARGET_STORE_NAME,
+ &&TARGET_DELETE_NAME,
+ &&TARGET_UNPACK_SEQUENCE,
+ &&TARGET_FOR_ITER,
+ &&TARGET_UNPACK_EX,
+ &&TARGET_STORE_ATTR,
+ &&TARGET_DELETE_ATTR,
+ &&TARGET_STORE_GLOBAL,
+ &&TARGET_DELETE_GLOBAL,
+ &&TARGET_DUP_TOPX,
+ &&TARGET_LOAD_CONST,
+ &&TARGET_LOAD_NAME,
+ &&TARGET_BUILD_TUPLE,
+ &&TARGET_BUILD_LIST,
+ &&TARGET_BUILD_SET,
+ &&TARGET_BUILD_MAP,
+ &&TARGET_LOAD_ATTR,
+ &&TARGET_COMPARE_OP,
+ &&TARGET_IMPORT_NAME,
+ &&TARGET_IMPORT_FROM,
+ &&TARGET_JUMP_FORWARD,
+ &&TARGET_JUMP_IF_FALSE,
+ &&TARGET_JUMP_IF_TRUE,
+ &&TARGET_JUMP_ABSOLUTE,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_LOAD_GLOBAL,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_CONTINUE_LOOP,
+ &&TARGET_SETUP_LOOP,
+ &&TARGET_SETUP_EXCEPT,
+ &&TARGET_SETUP_FINALLY,
+ &&_unknown_opcode,
+ &&TARGET_LOAD_FAST,
+ &&TARGET_STORE_FAST,
+ &&TARGET_DELETE_FAST,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_RAISE_VARARGS,
+ &&TARGET_CALL_FUNCTION,
+ &&TARGET_MAKE_FUNCTION,
+ &&TARGET_BUILD_SLICE,
+ &&TARGET_MAKE_CLOSURE,
+ &&TARGET_LOAD_CLOSURE,
+ &&TARGET_LOAD_DEREF,
+ &&TARGET_STORE_DEREF,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&TARGET_CALL_FUNCTION_VAR,
+ &&TARGET_CALL_FUNCTION_KW,
+ &&TARGET_CALL_FUNCTION_VAR_KW,
+ &&TARGET_EXTENDED_ARG,
+ &&_unknown_opcode,
+ &&TARGET_LIST_APPEND,
+ &&TARGET_SET_ADD,
+ &&TARGET_MAP_ADD,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode,
+ &&_unknown_opcode
+};