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gh-105481: refactor instr flag related code into a new InstructionFlags class#105950

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Merged
iritkatriel merged 5 commits intopython:mainfromiritkatriel:flags
Jun 21, 2023
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@iritkatriel
iritkatriel committedJun 21, 2023
commita08ac664c227730f1512b2397983dbb51b97cf21
48 changes: 27 additions & 21 deletionsTools/cases_generator/generate_cases.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -238,38 +238,40 @@ def cast(self, dst: StackEffect, src: StackEffect) -> str:
class InstructionFlags:
"""Construct and manipulate instruction flags"""

INSTRUCTION_FLAGS = ['HAS_ARG', 'HAS_CONST', 'HAS_NAME', 'HAS_JUMP']
INSTRUCTION_FLAGS = ["HAS_ARG", "HAS_CONST", "HAS_NAME", "HAS_JUMP"]
INSTR_FLAG_SUFFIX = "_FLAG"

def __init__(self, has_arg: bool, has_const: bool, has_name: bool,
has_jump: bool):
def __init__(
self, has_arg: bool, has_const: bool, has_name: bool, has_jump: bool
):

self.data = {
'HAS_ARG': has_arg,
'HAS_CONST': has_const,
'HAS_NAME': has_name,
'HAS_JUMP': has_jump,
"HAS_ARG": has_arg,
"HAS_CONST": has_const,
"HAS_NAME": has_name,
"HAS_JUMP": has_jump,
}
assert set(self.data.keys()) == set(self.INSTRUCTION_FLAGS)

@staticmethod
def fromInstruction(instr: "AnyInstruction"):
return InstructionFlags(
has_arg =variable_used(instr, "oparg"),
has_const =variable_used(instr, "FRAME_CO_CONSTS"),
has_name =variable_used(instr, "FRAME_CO_NAMES"),
has_jump =variable_used(instr, "JUMPBY"),
has_arg=variable_used(instr, "oparg"),
has_const=variable_used(instr, "FRAME_CO_CONSTS"),
has_name=variable_used(instr, "FRAME_CO_NAMES"),
has_jump=variable_used(instr, "JUMPBY"),
)

@staticmethod
def newEmpty():
return InstructionFlags(False, False, False, False)

def __str__(self) -> str:
flags_strs = [f"{name}{self.INSTR_FLAG_SUFFIX}" for i, name in
enumerate(self.INSTRUCTION_FLAGS) if self.is_set(name)]
if (len(flags_strs)) == 4: breakpoint()
return "0" if not flags_strs else ' | '.join(flags_strs)
def names(self) -> list[str]:
return [
f"{name}{self.INSTR_FLAG_SUFFIX}"
for name in self.INSTRUCTION_FLAGS
if self.is_set(name)
]

def __eq__(self, other: "InstructionFlags") -> False:
return self.bitmap() == other.bitmap()
Expand All@@ -291,14 +293,14 @@ def is_set(self, name: str) -> bool:
return self.data[name]

@classmethod
def emit_macros(cls,formatter: Formatter):
def emit_macros(cls,out: Formatter):
for i, flag in enumerate(cls.INSTRUCTION_FLAGS):
flag_name = f"{flag}{cls.INSTR_FLAG_SUFFIX}"
formatter.emit(f"#define {flag_name} ({1 << i})");
out.emit(f"#define {flag_name} ({1 << i})");

for flag in cls.INSTRUCTION_FLAGS:
flag_name = f"{flag}{cls.INSTR_FLAG_SUFFIX}"
formatter.emit(
out.emit(
f"#define OPCODE_{flag}(OP) "
f"(_PyOpcode_opcode_metadata[(OP)].flags & ({flag_name}))")

Expand DownExpand Up@@ -1206,9 +1208,13 @@ def write_pseudo_instrs(self) -> None:
self.out.emit(f" ((OP) == {op}) || \\")
self.out.emit(f" 0")

def emit_metadata_entry(self, name: str, fmt: str, flags: InstructionFlags) -> None:
def emit_metadata_entry(
self, name: str, fmt: str, flags: InstructionFlags
) -> None:
if not (names := flags.names()):
names.append("0")
self.out.emit(
f" [{name}] = {{ true, {INSTR_FMT_PREFIX}{fmt}, {flags} }},"
f" [{name}] = {{ true, {INSTR_FMT_PREFIX}{fmt}, {' | '.join(names)} }},"
)

def write_metadata_for_inst(self, instr: Instruction) -> None:
Expand Down

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