Mercurial > cpython-lru_cache-weakref

annotate Python/makeopcodetargets.py @ 51145:9742e8a4dca1

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Issue #4707: round(x, n) now returns an integer when x is an integer. Previously it returned a float.
author Mark Dickinson <dickinsm@gmail.com>
date Wed, 28 Jan 2009 21:25:58 +0000
parents d86e23318b41
children df090597afaa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
51031
d86e23318b41 Issue #4753: By enabling a configure option named '--with-computed-gotos'
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1 #! /usr/bin/env python
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2 """Generate C code for the jump table of the threaded code interpreter
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3 (for compilers supporting computed gotos or "labels-as-values", such as gcc).
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4 """
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5
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6 import imp
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7 import os
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8
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9
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10 def find_module(modname):
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11 """Finds and returns a module in the local dist/checkout.
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12 """
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13 modpath = os.path.join(
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14 os.path.dirname(os.path.dirname(__file__)), "Lib")
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15 return imp.load_module(modname, *imp.find_module(modname, [modpath]))
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16
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17 def write_contents(f):
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18 """Write C code contents to the target file object.
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19 """
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20 opcode = find_module("opcode")
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21 targets = ['_unknown_opcode'] * 256
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22 for opname, op in opcode.opmap.items():
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23 if opname == "STOP_CODE":
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24 # XXX opcode not implemented
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25 continue
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26 targets[op] = "TARGET_%s" % opname
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27 f.write("static void *opcode_targets[256] = {\n")
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28 f.write(",\n".join("\t&&%s" % s for s in targets))
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29 f.write("\n};\n")
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30
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31
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32 if __name__ == "__main__":
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33 import sys
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34 assert len(sys.argv) < 3, "Too many arguments"
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35 if len(sys.argv) == 2:
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36 target = sys.argv[1]
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37 else:
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38 target = "Python/opcode_targets.h"
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39 f = open(target, "w")
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40 try:
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41 write_contents(f)
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42 finally:
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43 f.close()