mirror of https://github.com/python/cpython
83 lines
3.1 KiB
Python
83 lines
3.1 KiB
Python
"""Utilities for writing StencilGroups out to a C header file."""
|
|
|
|
import itertools
|
|
import typing
|
|
import math
|
|
|
|
import _stencils
|
|
|
|
|
|
def _dump_footer(
|
|
groups: dict[str, _stencils.StencilGroup], symbols: dict[str, int]
|
|
) -> typing.Iterator[str]:
|
|
symbol_mask_size = max(math.ceil(len(symbols) / 32), 1)
|
|
yield f'static_assert(SYMBOL_MASK_WORDS >= {symbol_mask_size}, "SYMBOL_MASK_WORDS too small");'
|
|
yield ""
|
|
yield "typedef struct {"
|
|
yield " void (*emit)("
|
|
yield " unsigned char *code, unsigned char *data, _PyExecutorObject *executor,"
|
|
yield " const _PyUOpInstruction *instruction, jit_state *state);"
|
|
yield " size_t code_size;"
|
|
yield " size_t data_size;"
|
|
yield " symbol_mask trampoline_mask;"
|
|
yield "} StencilGroup;"
|
|
yield ""
|
|
yield f"static const StencilGroup shim = {groups['shim'].as_c('shim')};"
|
|
yield ""
|
|
yield "static const StencilGroup stencil_groups[MAX_UOP_ID + 1] = {"
|
|
for opname, group in sorted(groups.items()):
|
|
if opname == "shim":
|
|
continue
|
|
yield f" [{opname}] = {group.as_c(opname)},"
|
|
yield "};"
|
|
yield ""
|
|
yield f"static const void * const symbols_map[{max(len(symbols), 1)}] = {{"
|
|
if symbols:
|
|
for symbol, ordinal in symbols.items():
|
|
yield f" [{ordinal}] = &{symbol},"
|
|
else:
|
|
yield " 0"
|
|
yield "};"
|
|
|
|
|
|
def _dump_stencil(opname: str, group: _stencils.StencilGroup) -> typing.Iterator[str]:
|
|
yield "void"
|
|
yield f"emit_{opname}("
|
|
yield " unsigned char *code, unsigned char *data, _PyExecutorObject *executor,"
|
|
yield " const _PyUOpInstruction *instruction, jit_state *state)"
|
|
yield "{"
|
|
for part, stencil in [("code", group.code), ("data", group.data)]:
|
|
for line in stencil.disassembly:
|
|
yield f" // {line}"
|
|
if stencil.body:
|
|
yield f" const unsigned char {part}_body[{len(stencil.body)}] = {{"
|
|
for i in range(0, len(stencil.body), 8):
|
|
row = " ".join(f"{byte:#04x}," for byte in stencil.body[i : i + 8])
|
|
yield f" {row}"
|
|
yield " };"
|
|
# Data is written first (so relaxations in the code work properly):
|
|
for part, stencil in [("data", group.data), ("code", group.code)]:
|
|
if stencil.body:
|
|
yield f" memcpy({part}, {part}_body, sizeof({part}_body));"
|
|
skip = False
|
|
stencil.holes.sort(key=lambda hole: hole.offset)
|
|
for hole, pair in itertools.zip_longest(stencil.holes, stencil.holes[1:]):
|
|
if skip:
|
|
skip = False
|
|
continue
|
|
if pair and (folded := hole.fold(pair, stencil.body)):
|
|
skip = True
|
|
hole = folded
|
|
yield f" {hole.as_c(part)}"
|
|
yield "}"
|
|
yield ""
|
|
|
|
|
|
def dump(
|
|
groups: dict[str, _stencils.StencilGroup], symbols: dict[str, int]
|
|
) -> typing.Iterator[str]:
|
|
"""Yield a JIT compiler line-by-line as a C header file."""
|
|
for opname, group in sorted(groups.items()):
|
|
yield from _dump_stencil(opname, group)
|
|
yield from _dump_footer(groups, symbols)
|