"""
opcode module - potentially shared between dis and other modules which
operate on bytecodes (e.g. peephole optimizers).
"""

__all__ = ["cmp_op", "hasconst", "hasname", "hasjrel", "hasjabs",
           "haslocal", "hascompare", "hasfree", "opname", "opmap",
           "HAVE_ARGUMENT", "EXTENDED_ARG", "hasnargs"]

# It's a chicken-and-egg I'm afraid:
# We're imported before _opcode's made.
# With exception unheeded
# (stack_effect is not needed)
# Both our chickens and eggs are allayed.
#     --Larry Hastings, 2013/11/23

try:
    from _opcode import stack_effect
    __all__.append('stack_effect')
except ImportError:
    pass

cmp_op = ('<', '<=', '==', '!=', '>', '>=')

hasconst = []
hasname = []
hasjrel = []
hasjabs = []
haslocal = []
hascompare = []
hasfree = []
hasnargs = [] # unused

opmap = {}
opname = ['<%r>' % (op,) for op in range(256)]

def def_op(name, op):
    opname[op] = name
    opmap[name] = op

def name_op(name, op):
    def_op(name, op)
    hasname.append(op)

def jrel_op(name, op):
    def_op(name, op)
    hasjrel.append(op)

def jabs_op(name, op):
    def_op(name, op)
    hasjabs.append(op)

# Instruction opcodes for compiled code
# Blank lines correspond to available opcodes

def_op('POP_TOP', 1)
def_op('ROT_TWO', 2)
def_op('ROT_THREE', 3)
def_op('DUP_TOP', 4)
def_op('DUP_TOP_TWO', 5)
def_op('ROT_FOUR', 6) # not emitted by pypy

def_op('NOP', 9)
def_op('UNARY_POSITIVE', 10)
def_op('UNARY_NEGATIVE', 11)
def_op('UNARY_NOT', 12)

def_op('UNARY_INVERT', 15)
def_op('BINARY_MATRIX_MULTIPLY', 16)
def_op('INPLACE_MATRIX_MULTIPLY', 17)

def_op('BINARY_POWER', 19)
def_op('BINARY_MULTIPLY', 20)

def_op('BINARY_MODULO', 22)
def_op('BINARY_ADD', 23)
def_op('BINARY_SUBTRACT', 24)
def_op('BINARY_SUBSCR', 25)
def_op('BINARY_FLOOR_DIVIDE', 26)
def_op('BINARY_TRUE_DIVIDE', 27)
def_op('INPLACE_FLOOR_DIVIDE', 28)
def_op('INPLACE_TRUE_DIVIDE', 29)
def_op('GET_LEN', 30)
def_op('MATCH_MAPPING', 31)
def_op('MATCH_SEQUENCE', 32)
def_op('MATCH_KEYS', 33)
def_op('COPY_DICT_WITHOUT_KEYS', 34)

def_op('CHECK_EG_MATCH', 37)

def_op('WITH_EXCEPT_START', 49)
def_op('GET_AITER', 50)
def_op('GET_ANEXT', 51)
def_op('BEFORE_ASYNC_WITH', 52)

def_op('END_ASYNC_FOR', 54)
def_op('INPLACE_ADD', 55)
def_op('INPLACE_SUBTRACT', 56)
def_op('INPLACE_MULTIPLY', 57)

def_op('INPLACE_MODULO', 59)
def_op('STORE_SUBSCR', 60)
def_op('DELETE_SUBSCR', 61)
def_op('BINARY_LSHIFT', 62)
def_op('BINARY_RSHIFT', 63)
def_op('BINARY_AND', 64)
def_op('BINARY_XOR', 65)
def_op('BINARY_OR', 66)
def_op('INPLACE_POWER', 67)
def_op('GET_ITER', 68)
def_op('GET_YIELD_FROM_ITER', 69)
def_op('PRINT_EXPR', 70)
def_op('LOAD_BUILD_CLASS', 71)
def_op('YIELD_FROM', 72)
def_op('GET_AWAITABLE', 73)
def_op('LOAD_ASSERTION_ERROR', 74)
def_op('INPLACE_LSHIFT', 75)
def_op('INPLACE_RSHIFT', 76)
def_op('INPLACE_AND', 77)
def_op('INPLACE_XOR', 78)
def_op('INPLACE_OR', 79)

def_op('LIST_TO_TUPLE', 82)
def_op('RETURN_VALUE', 83)
def_op('IMPORT_STAR', 84)
def_op('SETUP_ANNOTATIONS', 85)
def_op('YIELD_VALUE', 86)
def_op('POP_BLOCK', 87)

def_op('PREP_RERAISE_STAR', 88)

def_op('POP_EXCEPT', 89)

HAVE_ARGUMENT = 90              # Opcodes from here have an argument:

name_op('STORE_NAME', 90)       # Index in name list
name_op('DELETE_NAME', 91)      # ""
def_op('UNPACK_SEQUENCE', 92)   # Number of tuple items
jrel_op('FOR_ITER', 93)
def_op('UNPACK_EX', 94)
name_op('STORE_ATTR', 95)       # Index in name list
name_op('DELETE_ATTR', 96)      # ""
name_op('STORE_GLOBAL', 97)     # ""
name_op('DELETE_GLOBAL', 98)    # ""
def_op('ROT_N', 99)
def_op('LOAD_CONST', 100)       # Index in const list
hasconst.append(100)
name_op('LOAD_NAME', 101)       # Index in name list
def_op('BUILD_TUPLE', 102)      # Number of tuple items
def_op('BUILD_LIST', 103)       # Number of list items
def_op('BUILD_SET', 104)        # Number of set items
def_op('BUILD_MAP', 105)        # Number of dict entries
name_op('LOAD_ATTR', 106)       # Index in name list
def_op('COMPARE_OP', 107)       # Comparison operator
hascompare.append(107)
name_op('IMPORT_NAME', 108)     # Index in name list
name_op('IMPORT_FROM', 109)     # Index in name list
jrel_op('JUMP_FORWARD', 110)    # Number of bytes to skip
jabs_op('JUMP_IF_FALSE_OR_POP', 111) # Target byte offset from beginning of code
jabs_op('JUMP_IF_TRUE_OR_POP', 112)  # ""
jabs_op('JUMP_ABSOLUTE', 113)        # ""
jabs_op('POP_JUMP_IF_FALSE', 114)    # ""
jabs_op('POP_JUMP_IF_TRUE', 115)     # ""
name_op('LOAD_GLOBAL', 116)     # Index in name list
def_op('IS_OP', 117)
def_op('CONTAINS_OP', 118)
def_op('RERAISE', 119)

jrel_op('SETUP_EXCEPT', 120)    # ""
jabs_op('JUMP_IF_NOT_EXC_MATCH', 121)
jrel_op('SETUP_FINALLY', 122)   # Distance to target address

def_op('LOAD_FAST', 124)        # Local variable number
haslocal.append(124)
def_op('STORE_FAST', 125)       # Local variable number
haslocal.append(125)
def_op('DELETE_FAST', 126)      # Local variable number
haslocal.append(126)

# def_op('GEN_START', 129)        # Kind of generator/coroutine https://github.com/python/cpython/issues/87849
def_op('RAISE_VARARGS', 130)    # Number of raise arguments (1, 2, or 3)
def_op('CALL_FUNCTION', 131)    # #args
def_op('MAKE_FUNCTION', 132)    # Flags
def_op('BUILD_SLICE', 133)      # Number of items

def_op('LOAD_CLOSURE', 135)
hasfree.append(135)
def_op('LOAD_DEREF', 136)
hasfree.append(136)
def_op('STORE_DEREF', 137)
hasfree.append(137)
def_op('DELETE_DEREF', 138)
hasfree.append(138)

def_op('CALL_FUNCTION_KW', 141)  # #args + #kwargs
def_op('CALL_FUNCTION_EX', 142)  # Flags
jrel_op('SETUP_WITH', 143)
def_op('EXTENDED_ARG', 144)
EXTENDED_ARG = 144
def_op('LIST_APPEND', 145)
def_op('SET_ADD', 146)
def_op('MAP_ADD', 147)
def_op('LOAD_CLASSDEREF', 148)
hasfree.append(148)

def_op('MATCH_CLASS', 152)

jrel_op('SETUP_ASYNC_WITH', 154)
def_op('FORMAT_VALUE', 155)
def_op('BUILD_CONST_KEY_MAP', 156)
def_op('BUILD_STRING', 157)

name_op('LOAD_METHOD', 160)
def_op('CALL_METHOD', 161)
def_op('LIST_EXTEND', 164)
def_op('SET_UPDATE', 165)
def_op('DICT_MERGE', 166)
def_op('DICT_UPDATE', 167)

# pypy modification, experimental bytecode
def_op('BUILD_LIST_FROM_ARG', 203)
def_op('CALL_METHOD_KW', 204)
def_op('LOAD_REVDB_VAR', 205)         # reverse debugger (syntax example: $5)

del def_op, name_op, jrel_op, jabs_op

_nb_ops = [
    ("NB_ADD", "+"),
    ("NB_AND", "&"),
    ("NB_FLOOR_DIVIDE", "//"),
    ("NB_LSHIFT", "<<"),
    ("NB_MATRIX_MULTIPLY", "@"),
    ("NB_MULTIPLY", "*"),
    ("NB_REMAINDER", "%"),
    ("NB_OR", "|"),
    ("NB_POWER", "**"),
    ("NB_RSHIFT", ">>"),
    ("NB_SUBTRACT", "-"),
    ("NB_TRUE_DIVIDE", "/"),
    ("NB_XOR", "^"),
    ("NB_INPLACE_ADD", "+="),
    ("NB_INPLACE_AND", "&="),
    ("NB_INPLACE_FLOOR_DIVIDE", "//="),
    ("NB_INPLACE_LSHIFT", "<<="),
    ("NB_INPLACE_MATRIX_MULTIPLY", "@="),
    ("NB_INPLACE_MULTIPLY", "*="),
    ("NB_INPLACE_REMAINDER", "%="),
    ("NB_INPLACE_OR", "|="),
    ("NB_INPLACE_POWER", "**="),
    ("NB_INPLACE_RSHIFT", ">>="),
    ("NB_INPLACE_SUBTRACT", "-="),
    ("NB_INPLACE_TRUE_DIVIDE", "/="),
    ("NB_INPLACE_XOR", "^="),
]

_specializations = {
    "BINARY_OP": [
        "BINARY_OP_ADAPTIVE",
        "BINARY_OP_ADD_FLOAT",
        "BINARY_OP_ADD_INT",
        "BINARY_OP_ADD_UNICODE",
        "BINARY_OP_INPLACE_ADD_UNICODE",
        "BINARY_OP_MULTIPLY_FLOAT",
        "BINARY_OP_MULTIPLY_INT",
        "BINARY_OP_SUBTRACT_FLOAT",
        "BINARY_OP_SUBTRACT_INT",
    ],
    "BINARY_SUBSCR": [
        "BINARY_SUBSCR_ADAPTIVE",
        "BINARY_SUBSCR_DICT",
        "BINARY_SUBSCR_GETITEM",
        "BINARY_SUBSCR_LIST_INT",
        "BINARY_SUBSCR_TUPLE_INT",
    ],
    "CALL": [
        "CALL_ADAPTIVE",
        "CALL_PY_EXACT_ARGS",
        "CALL_PY_WITH_DEFAULTS",
    ],
    "COMPARE_OP": [
        "COMPARE_OP_ADAPTIVE",
        "COMPARE_OP_FLOAT_JUMP",
        "COMPARE_OP_INT_JUMP",
        "COMPARE_OP_STR_JUMP",
    ],
    "EXTENDED_ARG": [
        "EXTENDED_ARG_QUICK",
    ],
    "JUMP_BACKWARD": [
        "JUMP_BACKWARD_QUICK",
    ],
    "LOAD_ATTR": [
        "LOAD_ATTR_ADAPTIVE",
        "LOAD_ATTR_INSTANCE_VALUE",
        "LOAD_ATTR_MODULE",
        "LOAD_ATTR_SLOT",
        "LOAD_ATTR_WITH_HINT",
    ],
    "LOAD_CONST": [
        "LOAD_CONST__LOAD_FAST",
    ],
    "LOAD_FAST": [
        "LOAD_FAST__LOAD_CONST",
        "LOAD_FAST__LOAD_FAST",
    ],
    "LOAD_GLOBAL": [
        "LOAD_GLOBAL_ADAPTIVE",
        "LOAD_GLOBAL_BUILTIN",
        "LOAD_GLOBAL_MODULE",
    ],
    "LOAD_METHOD": [
        "LOAD_METHOD_ADAPTIVE",
        "LOAD_METHOD_CLASS",
        "LOAD_METHOD_MODULE",
        "LOAD_METHOD_NO_DICT",
        "LOAD_METHOD_WITH_DICT",
        "LOAD_METHOD_WITH_VALUES",
    ],
    "PRECALL": [
        "PRECALL_ADAPTIVE",
        "PRECALL_BOUND_METHOD",
        "PRECALL_BUILTIN_CLASS",
        "PRECALL_BUILTIN_FAST_WITH_KEYWORDS",
        "PRECALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS",
        "PRECALL_NO_KW_BUILTIN_FAST",
        "PRECALL_NO_KW_BUILTIN_O",
        "PRECALL_NO_KW_ISINSTANCE",
        "PRECALL_NO_KW_LEN",
        "PRECALL_NO_KW_LIST_APPEND",
        "PRECALL_NO_KW_METHOD_DESCRIPTOR_FAST",
        "PRECALL_NO_KW_METHOD_DESCRIPTOR_NOARGS",
        "PRECALL_NO_KW_METHOD_DESCRIPTOR_O",
        "PRECALL_NO_KW_STR_1",
        "PRECALL_NO_KW_TUPLE_1",
        "PRECALL_NO_KW_TYPE_1",
        "PRECALL_PYFUNC",
    ],
    "RESUME": [
        "RESUME_QUICK",
    ],
    "STORE_ATTR": [
        "STORE_ATTR_ADAPTIVE",
        "STORE_ATTR_INSTANCE_VALUE",
        "STORE_ATTR_SLOT",
        "STORE_ATTR_WITH_HINT",
    ],
    "STORE_FAST": [
        "STORE_FAST__LOAD_FAST",
        "STORE_FAST__STORE_FAST",
    ],
    "STORE_SUBSCR": [
        "STORE_SUBSCR_ADAPTIVE",
        "STORE_SUBSCR_DICT",
        "STORE_SUBSCR_LIST_INT",
    ],
    "UNPACK_SEQUENCE": [
        "UNPACK_SEQUENCE_ADAPTIVE",
        "UNPACK_SEQUENCE_LIST",
        "UNPACK_SEQUENCE_TUPLE",
        "UNPACK_SEQUENCE_TWO_TUPLE",
    ],
}
_specialized_instructions = [
    opcode for family in _specializations.values() for opcode in family
]
_specialization_stats = [
    "success",
    "failure",
    "hit",
    "deferred",
    "miss",
    "deopt",
]

_cache_format = {
    "LOAD_GLOBAL": {
        "counter": 1,
        "index": 1,
        "module_keys_version": 2,
        "builtin_keys_version": 1,
    },
    "BINARY_OP": {
        "counter": 1,
    },
    "UNPACK_SEQUENCE": {
        "counter": 1,
    },
    "COMPARE_OP": {
        "counter": 1,
        "mask": 1,
    },
    "BINARY_SUBSCR": {
        "counter": 1,
        "type_version": 2,
        "func_version": 1,
    },
    "LOAD_ATTR": {
        "counter": 1,
        "version": 2,
        "index": 1,
    },
    "STORE_ATTR": {
        "counter": 1,
        "version": 2,
        "index": 1,
    },
    "LOAD_METHOD": {
        "counter": 1,
        "type_version": 2,
        "dict_offset": 1,
        "keys_version": 2,
        "descr": 4,
    },
    "CALL": {
        "counter": 1,
        "func_version": 2,
        "min_args": 1,
    },
    "PRECALL": {
        "counter": 1,
    },
    "STORE_SUBSCR": {
        "counter": 1,
    },
}

#_inline_cache_entries = [
#    sum(_cache_format.get(opname[opcode], {}).values()) for opcode in range(256)
#]

_inline_cache_entries = [0] * 256 # pypy has no inline caches