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bpo-41463: Generate information about jumps from 'opcode.py' rather than duplicating it in 'compile.c' (GH-21714)

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Generate information about jumps from 'opcode.py' rather than duplicate it in 'compile.c'
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Mark Shannon 2020-08-04 17:30:11 +01:00 • committed by GitHub
parent c7decc27d5
commit 582aaf19e8
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 114 additions and 59 deletions
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19
Tools/scripts/generate_opcode_h.py
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@ -30,6 +30,18 @@ footer = """
#endif /* !Py_OPCODE_H */
"""
UINT32_MASK = (1<<32)-1
def write_int_array_from_ops(name, ops, out):
bits = 0
for op in ops:
bits |= 1<<op
out.write(f"static uint32_t {name}[8] = {{\n")
for i in range(8):
out.write(f" {bits & UINT32_MASK}U,\n")
bits >>= 32
assert bits == 0
out.write(f"}};\n")
def main(opcode_py, outfile='Include/opcode.h'):
opcode = {}
@ -41,6 +53,8 @@ def main(opcode_py, outfile='Include/opcode.h'):
code = fp.read()
exec(code, opcode)
opmap = opcode['opmap']
hasjrel = opcode['hasjrel']
hasjabs = opcode['hasjabs']
with open(outfile, 'w') as fobj:
fobj.write(header)
for name in opcode['opname']:
@ -49,8 +63,13 @@ def main(opcode_py, outfile='Include/opcode.h'):
if name == 'POP_EXCEPT': # Special entry for HAVE_ARGUMENT
fobj.write("#define %-23s %3d\n" %
('HAVE_ARGUMENT', opcode['HAVE_ARGUMENT']))
fobj.write("#ifdef NEED_OPCODE_JUMP_TABLES\n")
write_int_array_from_ops("_PyOpcode_RelativeJump", opcode['hasjrel'], fobj)
write_int_array_from_ops("_PyOpcode_Jump", opcode['hasjrel'] + opcode['hasjabs'], fobj)
fobj.write("#endif /* OPCODE_TABLES */\n")
fobj.write(footer)
print("%s regenerated from %s" % (outfile, opcode_py))