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f6d9e5926b
Add an option (--enable-experimental-jit for configure-based builds or --experimental-jit for PCbuild-based ones) to build an *experimental* just-in-time compiler, based on copy-and-patch (https://fredrikbk.com/publications/copy-and-patch.pdf). See Tools/jit/README.md for more information on how to install the required build-time tooling.
95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
"""Utilities for writing StencilGroups out to a C header file."""
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import typing
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import _schema
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import _stencils
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def _dump_header() -> typing.Iterator[str]:
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yield "typedef enum {"
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for kind in typing.get_args(_schema.HoleKind):
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yield f" HoleKind_{kind},"
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yield "} HoleKind;"
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yield ""
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yield "typedef enum {"
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for value in _stencils.HoleValue:
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yield f" HoleValue_{value.name},"
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yield "} HoleValue;"
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yield ""
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yield "typedef struct {"
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yield " const uint64_t offset;"
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yield " const HoleKind kind;"
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yield " const HoleValue value;"
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yield " const void *symbol;"
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yield " const uint64_t addend;"
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yield "} Hole;"
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yield ""
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yield "typedef struct {"
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yield " const size_t body_size;"
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yield " const unsigned char * const body;"
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yield " const size_t holes_size;"
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yield " const Hole * const holes;"
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yield "} Stencil;"
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yield ""
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yield "typedef struct {"
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yield " const Stencil code;"
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yield " const Stencil data;"
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yield "} StencilGroup;"
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yield ""
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def _dump_footer(opnames: typing.Iterable[str]) -> typing.Iterator[str]:
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yield "#define INIT_STENCIL(STENCIL) { \\"
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yield " .body_size = Py_ARRAY_LENGTH(STENCIL##_body) - 1, \\"
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yield " .body = STENCIL##_body, \\"
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yield " .holes_size = Py_ARRAY_LENGTH(STENCIL##_holes) - 1, \\"
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yield " .holes = STENCIL##_holes, \\"
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yield "}"
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yield ""
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yield "#define INIT_STENCIL_GROUP(OP) { \\"
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yield " .code = INIT_STENCIL(OP##_code), \\"
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yield " .data = INIT_STENCIL(OP##_data), \\"
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yield "}"
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yield ""
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yield "static const StencilGroup stencil_groups[512] = {"
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for opname in opnames:
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yield f" [{opname}] = INIT_STENCIL_GROUP({opname}),"
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yield "};"
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yield ""
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yield "#define GET_PATCHES() { \\"
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for value in _stencils.HoleValue:
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yield f" [HoleValue_{value.name}] = (uint64_t)0xBADBADBADBADBADB, \\"
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yield "}"
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def _dump_stencil(opname: str, group: _stencils.StencilGroup) -> typing.Iterator[str]:
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yield f"// {opname}"
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for part, stencil in [("code", group.code), ("data", group.data)]:
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for line in stencil.disassembly:
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yield f"// {line}"
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if stencil.body:
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size = len(stencil.body) + 1
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yield f"static const unsigned char {opname}_{part}_body[{size}] = {{"
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for i in range(0, len(stencil.body), 8):
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row = " ".join(f"{byte:#04x}," for byte in stencil.body[i : i + 8])
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yield f" {row}"
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yield "};"
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else:
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yield f"static const unsigned char {opname}_{part}_body[1];"
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if stencil.holes:
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size = len(stencil.holes) + 1
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yield f"static const Hole {opname}_{part}_holes[{size}] = {{"
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for hole in stencil.holes:
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yield f" {hole.as_c()},"
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yield "};"
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else:
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yield f"static const Hole {opname}_{part}_holes[1];"
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yield ""
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def dump(groups: dict[str, _stencils.StencilGroup]) -> typing.Iterator[str]:
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"""Yield a JIT compiler line-by-line as a C header file."""
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yield from _dump_header()
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for opname, group in groups.items():
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yield from _dump_stencil(opname, group)
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yield from _dump_footer(groups)
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