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Charles G. Waldman <cgw@fnal.gov>:

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Add the EXTENDED_ARG opcode to the virtual machine, allowing 32-bit
arguments to opcodes instead of being forced to stick to the 16-bit
limit.  This is especially useful for machine-generated code, which
can be too long for the SET_LINENO parameter to fit into 16 bits.

This closes the implementation portion of SourceForge patch #100893.
This commit is contained in:
Fred Drake 2000-08-24 00:32:09 +00:00
parent e266e42c9c
commit ef8ace3a6f
6 changed files with 56 additions and 6 deletions
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8
Lib/dis.py
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@ -56,6 +56,7 @@ def disassemble(co, lasti=-1):
labels = findlabels(code)
n = len(code)
i = 0
extended_arg = 0
while i < n:
c = code[i]
op = ord(c)
@ -68,8 +69,11 @@ def disassemble(co, lasti=-1):
print string.ljust(opname[op], 20),
i = i+1
if op >= HAVE_ARGUMENT:
oparg = ord(code[i]) + ord(code[i+1])*256
oparg = ord(code[i]) + ord(code[i+1])*256 + extended_arg
extended_arg = 0
i = i+2
if op == EXTENDED_ARG:
extended_arg = oparg*65536L
print string.rjust(`oparg`, 5),
if op in hasconst:
print '(' + `co.co_consts[oparg]` + ')',
@ -258,6 +262,8 @@ def_op('CALL_FUNCTION_VAR', 140) # #args + (#kwargs << 8)
def_op('CALL_FUNCTION_KW', 141) # #args + (#kwargs << 8)
def_op('CALL_FUNCTION_VAR_KW', 142) # #args + (#kwargs << 8)
def_op('EXTENDED_ARG', 143)
EXTENDED_ARG = 143
def _test():
"""Simple test program to disassemble a file."""