mirror of https://github.com/python/cpython
96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
"""Generate uop metadata.
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Reads the instruction definitions from bytecodes.c.
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Writes the metadata to pycore_uop_metadata.h by default.
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"""
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import argparse
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from analyzer import (
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Analysis,
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analyze_files,
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)
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from generators_common import (
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DEFAULT_INPUT,
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ROOT,
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write_header,
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cflags,
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)
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from stack import Stack
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from cwriter import CWriter
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from typing import TextIO
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DEFAULT_OUTPUT = ROOT / "Include/internal/pycore_uop_metadata.h"
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def generate_names_and_flags(analysis: Analysis, out: CWriter) -> None:
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out.emit("extern const uint16_t _PyUop_Flags[MAX_UOP_ID+1];\n")
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out.emit("extern const uint8_t _PyUop_Replication[MAX_UOP_ID+1];\n")
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out.emit("extern const char * const _PyOpcode_uop_name[MAX_UOP_ID+1];\n\n")
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out.emit("extern int _PyUop_num_popped(int opcode, int oparg);\n\n")
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out.emit("#ifdef NEED_OPCODE_METADATA\n")
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out.emit("const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {\n")
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for uop in analysis.uops.values():
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if uop.is_viable() and uop.properties.tier != 1:
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out.emit(f"[{uop.name}] = {cflags(uop.properties)},\n")
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out.emit("};\n\n")
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out.emit("const uint8_t _PyUop_Replication[MAX_UOP_ID+1] = {\n")
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for uop in analysis.uops.values():
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if uop.replicated:
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out.emit(f"[{uop.name}] = {uop.replicated},\n")
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out.emit("};\n\n")
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out.emit("const char *const _PyOpcode_uop_name[MAX_UOP_ID+1] = {\n")
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for uop in sorted(analysis.uops.values(), key=lambda t: t.name):
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if uop.is_viable() and uop.properties.tier != 1:
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out.emit(f'[{uop.name}] = "{uop.name}",\n')
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out.emit("};\n")
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out.emit("int _PyUop_num_popped(int opcode, int oparg)\n{\n")
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out.emit("switch(opcode) {\n")
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for uop in analysis.uops.values():
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if uop.is_viable() and uop.properties.tier != 1:
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stack = Stack()
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for var in reversed(uop.stack.inputs):
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stack.pop(var)
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popped = (-stack.base_offset).to_c()
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out.emit(f"case {uop.name}:\n")
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out.emit(f" return {popped};\n")
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out.emit("default:\n")
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out.emit(" return -1;\n")
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out.emit("}\n")
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out.emit("}\n\n")
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out.emit("#endif // NEED_OPCODE_METADATA\n\n")
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def generate_uop_metadata(
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filenames: list[str], analysis: Analysis, outfile: TextIO
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) -> None:
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write_header(__file__, filenames, outfile)
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out = CWriter(outfile, 0, False)
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with out.header_guard("Py_CORE_UOP_METADATA_H"):
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out.emit("#include <stdint.h>\n")
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out.emit('#include "pycore_uop_ids.h"\n')
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generate_names_and_flags(analysis, out)
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arg_parser = argparse.ArgumentParser(
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description="Generate the header file with uop metadata.",
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formatter_class=argparse.ArgumentDefaultsHelpFormatter,
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)
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arg_parser.add_argument(
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"-o", "--output", type=str, help="Generated code", default=DEFAULT_OUTPUT
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)
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arg_parser.add_argument(
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"input", nargs=argparse.REMAINDER, help="Instruction definition file(s)"
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)
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if __name__ == "__main__":
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args = arg_parser.parse_args()
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if len(args.input) == 0:
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args.input.append(DEFAULT_INPUT)
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data = analyze_files(args.input)
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with open(args.output, "w") as outfile:
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generate_uop_metadata(args.input, data, outfile)
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