cpython/Include/opcode.h

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#ifndef Py_OPCODE_H
#define Py_OPCODE_H
#ifdef __cplusplus
extern "C" {
#endif
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/* Instruction opcodes for compiled code */
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#define STOP_CODE 0
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#define POP_TOP 1
#define ROT_TWO 2
#define ROT_THREE 3
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#define DUP_TOP 4
#define ROT_FOUR 5
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#define UNARY_POSITIVE 10
#define UNARY_NEGATIVE 11
#define UNARY_NOT 12
#define UNARY_CONVERT 13
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#define UNARY_INVERT 15
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#define BINARY_POWER 19
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#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 SLICE 30
/* Also uses 31-33 */
#define STORE_SLICE 40
/* Also uses 41-43 */
#define DELETE_SLICE 50
/* Also uses 51-53 */
#define INPLACE_ADD 55
#define INPLACE_SUBTRACT 56
#define INPLACE_MULTIPLY 57
#define INPLACE_DIVIDE 58
#define INPLACE_MODULO 59
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#define STORE_SUBSCR 60
#define DELETE_SUBSCR 61
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#define BINARY_LSHIFT 62
#define BINARY_RSHIFT 63
#define BINARY_AND 64
#define BINARY_XOR 65
#define BINARY_OR 66
#define INPLACE_POWER 67
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#define PRINT_EXPR 70
#define PRINT_ITEM 71
#define PRINT_NEWLINE 72
#define PRINT_ITEM_TO 73
#define PRINT_NEWLINE_TO 74
#define INPLACE_LSHIFT 75
#define INPLACE_RSHIFT 76
#define INPLACE_AND 77
#define INPLACE_XOR 78
#define INPLACE_OR 79
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#define BREAK_LOOP 80
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#define LOAD_LOCALS 82
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#define RETURN_VALUE 83
#define IMPORT_STAR 84
#define EXEC_STMT 85
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#define POP_BLOCK 87
#define END_FINALLY 88
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#define BUILD_CLASS 89
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#define HAVE_ARGUMENT 90 /* Opcodes from here have an argument: */
#define STORE_NAME 90 /* Index in name list */
#define DELETE_NAME 91 /* "" */
#define UNPACK_SEQUENCE 92 /* Number of sequence items */
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#define STORE_ATTR 95 /* Index in name list */
#define DELETE_ATTR 96 /* "" */
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#define STORE_GLOBAL 97 /* "" */
#define DELETE_GLOBAL 98 /* "" */
#define DUP_TOPX 99 /* number of items to duplicate */
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#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 LOAD_GLOBAL 116 /* Index in name list */
#define CONTINUE_LOOP 119 /* Start of loop (absolute) */
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#define SETUP_LOOP 120 /* Target address (absolute) */
#define SETUP_EXCEPT 121 /* "" */
#define SETUP_FINALLY 122 /* "" */
#define LOAD_FAST 124 /* Local variable number */
#define STORE_FAST 125 /* Local variable number */
#define DELETE_FAST 126 /* Local variable number */
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#define SET_LINENO 127 /* Current line number */
#define RAISE_VARARGS 130 /* Number of raise arguments (1, 2 or 3) */
/* CALL_FUNCTION_XXX opcodes defined below depend on this definition */
#define CALL_FUNCTION 131 /* #args + (#kwargs<<8) */
#define MAKE_FUNCTION 132 /* #defaults */
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#define BUILD_SLICE 133 /* Number of items */
PEP 227 implementation The majority of the changes are in the compiler. The mainloop changes primarily to implement the new opcodes and to pass a function's closure to eval_code2(). Frames and functions got new slots to hold the closure. Include/compile.h Add co_freevars and co_cellvars slots to code objects. Update PyCode_New() to take freevars and cellvars as arguments Include/funcobject.h Add func_closure slot to function objects. Add GetClosure()/SetClosure() functions (and corresponding macros) for getting at the closure. Include/frameobject.h PyFrame_New() now takes a closure. Include/opcode.h Add four new opcodes: MAKE_CLOSURE, LOAD_CLOSURE, LOAD_DEREF, STORE_DEREF. Remove comment about old requirement for opcodes to fit in 7 bits. compile.c Implement changes to code objects for co_freevars and co_cellvars. Modify symbol table to use st_cur_name (string object for the name of the current scope) and st_cur_children (list of nested blocks). Also define st_nested, which might more properly be called st_cur_nested. Add several DEF_XXX flags to track def-use information for free variables. New or modified functions of note: com_make_closure(struct compiling *, PyCodeObject *) Emit LOAD_CLOSURE opcodes as needed to pass cells for free variables into nested scope. com_addop_varname(struct compiling *, int, char *) Emits opcodes for LOAD_DEREF and STORE_DEREF. get_ref_type(struct compiling *, char *name) Return NAME_CLOSURE if ref type is FREE or CELL symtable_load_symbols(struct compiling *) Decides what variables are cell or free based on def-use info. Can now raise SyntaxError if nested scopes are mixed with exec or from blah import *. make_scope_info(PyObject *, PyObject *, int, int) Helper functions for symtable scope stack. symtable_update_free_vars(struct symtable *) After a code block has been analyzed, it must check each of its children for free variables that are not defined in the block. If a variable is free in a child and not defined in the parent, then it is defined by block the enclosing the current one or it is a global. This does the right logic. symtable_add_use() is now a macro for symtable_add_def() symtable_assign(struct symtable *, node *) Use goto instead of for (;;) Fixed bug in symtable where name of keyword argument in function call was treated as assignment in the scope of the call site. Ex: def f(): g(a=2) # a was considered a local of f ceval.c eval_code2() now take one more argument, a closure. Implement LOAD_CLOSURE, LOAD_DEREF, STORE_DEREF, MAKE_CLOSURE> Also: When name error occurs for global variable, report that the name was global in the error mesage. Objects/frameobject.c Initialize f_closure to be a tuple containing space for cellvars and freevars. f_closure is NULL if neither are present. Objects/funcobject.c Add support for func_closure. Python/import.c Change the magic number. Python/marshal.c Track changes to code objects.
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#define MAKE_CLOSURE 134 /* #free vars */
#define LOAD_CLOSURE 135 /* Load free variable from closure */
#define LOAD_DEREF 136 /* Load and dereference from closure cell */
#define STORE_DEREF 137 /* Store into cell */
/* The next 3 opcodes must be contiguous and satisfy
(CALL_FUNCTION_VAR - CALL_FUNCTION) & 3 == 1 */
#define CALL_FUNCTION_VAR 140 /* #args + (#kwargs<<8) */
#define CALL_FUNCTION_KW 141 /* #args + (#kwargs<<8) */
#define CALL_FUNCTION_VAR_KW 142 /* #args + (#kwargs<<8) */
/* Support for opargs more than 16 bits long */
#define EXTENDED_ARG 143
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/* Comparison operator codes (argument to COMPARE_OP) */
enum cmp_op {LT=Py_LT, LE=Py_LE, EQ=Py_EQ, NE=Py_NE, GT=Py_GT, GE=Py_GE,
IN, NOT_IN, IS, IS_NOT, EXC_MATCH, BAD};
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#define HAS_ARG(op) ((op) >= HAVE_ARGUMENT)
#ifdef __cplusplus
}
#endif
#endif /* !Py_OPCODE_H */