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annotate Python/makeopcodetargets.py @ 56844:b97e8cebe8ed 3.1

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Merged revisions 75441 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ................ r75441 | mark.dickinson | 2009-10-15 20:55:18 +0100 (Thu, 15 Oct 2009) | 9 lines Merged revisions 75440 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r75440 | mark.dickinson | 2009-10-15 18:45:39 +0100 (Thu, 15 Oct 2009) | 1 line Allow core Python build to succeed under WITHOUT_COMPLEX. The module build stage still fails. ........ ................
author Mark Dickinson <dickinsm@gmail.com>
date Tue, 27 Oct 2009 17:31:26 +0000
parents df090597afaa
children f197407bdba2 fcfe324663a6
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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 # This code should stay compatible with Python 2.3, at least while
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7 # some of the buildbots have Python 2.3 as their system Python.
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8
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9 import imp
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10 import os
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11
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12
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13 def find_module(modname):
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14 """Finds and returns a module in the local dist/checkout.
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15 """
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16 modpath = os.path.join(
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17 os.path.dirname(os.path.dirname(__file__)), "Lib")
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18 return imp.load_module(modname, *imp.find_module(modname, [modpath]))
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19
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20 def write_contents(f):
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21 """Write C code contents to the target file object.
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22 """
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23 opcode = find_module("opcode")
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24 targets = ['_unknown_opcode'] * 256
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25 for opname, op in opcode.opmap.items():
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26 if opname == "STOP_CODE":
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27 # XXX opcode not implemented
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28 continue
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29 targets[op] = "TARGET_%s" % opname
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30 f.write("static void *opcode_targets[256] = {\n")
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31 f.write(",\n".join(["\t&&%s" % s for s in targets]))
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32 f.write("\n};\n")
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33
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34
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35 if __name__ == "__main__":
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36 import sys
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37 assert len(sys.argv) < 3, "Too many arguments"
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38 if len(sys.argv) == 2:
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39 target = sys.argv[1]
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40 else:
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41 target = "Python/opcode_targets.h"
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42 f = open(target, "w")
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43 try:
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44 write_contents(f)
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45 finally:
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46 f.close()