Initial revision
diff --git a/Include/opcode.h b/Include/opcode.h
new file mode 100644
index 0000000..43ce54e
--- /dev/null
+++ b/Include/opcode.h
@@ -0,0 +1,78 @@
+/* Instruction opcodes for compiled code */
+
+#define DUP_TOP 0
+#define POP_TOP 1
+#define ROT_TWO 2
+#define ROT_THREE 3
+
+#define UNARY_POSITIVE 10
+#define UNARY_NEGATIVE 11
+#define UNARY_NOT 12
+#define UNARY_CONVERT 13
+#define UNARY_CALL 14
+
+#define BINARY_MULTIPLY 20
+#define BINARY_DIVIDE 21
+#define BINARY_MODULO 22
+#define BINARY_ADD 23
+#define BINARY_SUBTRACT 24
+#define BINARY_SUBSCR 25
+#define BINARY_CALL 26
+
+#define SLICE 30
+/* Also uses 31-33 */
+
+#define STORE_SLICE 40
+/* Also uses 41-43 */
+
+#define DELETE_SLICE 50
+/* Also uses 51-53 */
+
+#define STORE_SUBSCR 60
+#define DELETE_SUBSCR 61
+
+#define PRINT_EXPR 70
+#define PRINT_ITEM 71
+#define PRINT_NEWLINE 72
+
+#define BREAK_LOOP 80
+#define RAISE_EXCEPTION 81
+#define RETURN_VALUE 83
+#define REQUIRE_ARGS 84
+#define REFUSE_ARGS 85
+#define BUILD_FUNCTION 86
+#define POP_BLOCK 87
+#define END_FINALLY 88
+
+#define HAVE_ARGUMENT 90 /* Opcodes from here have an argument: */
+
+#define STORE_NAME 90 /* Index in name list */
+#define DELETE_NAME 91 /* "" */
+#define UNPACK_TUPLE 92 /* Number of tuple items */
+#define UNPACK_LIST 93 /* Number of list items */
+/* unused: 94 */
+#define STORE_ATTR 95 /* Index in name list */
+#define DELETE_ATTR 96 /* "" */
+
+#define LOAD_CONST 100 /* Index in const list */
+#define LOAD_NAME 101 /* Index in name list */
+#define BUILD_TUPLE 102 /* Number of tuple items */
+#define BUILD_LIST 103 /* Number of list items */
+#define BUILD_MAP 104 /* Always zero for now */
+#define LOAD_ATTR 105 /* Index in name list */
+#define COMPARE_OP 106 /* Comparison operator */
+#define IMPORT_NAME 107 /* Index in name list */
+#define IMPORT_FROM 108 /* Index in name list */
+
+#define JUMP_FORWARD 110 /* Number of bytes to skip */
+#define JUMP_IF_FALSE 111 /* "" */
+#define JUMP_IF_TRUE 112 /* "" */
+#define JUMP_ABSOLUTE 113 /* Target byte offset from beginning of code */
+#define FOR_LOOP 114 /* Number of bytes to skip */
+
+#define SETUP_LOOP 120 /* Target address (absolute) */
+#define SETUP_EXCEPT 121 /* "" */
+#define SETUP_FINALLY 122 /* "" */
+
+/* Comparison operator codes (argument to COMPARE_OP) */
+enum cmp_op {LT, LE, EQ, NE, GT, GE, IN, NOT_IN, IS, IS_NOT, EXC_MATCH, BAD};