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/* This file contains code shared by the compiler and the peephole
optimizer.
*/
/* Minimum number of bytes necessary to encode instruction with EXTENDED_ARGs */
static int
instrsize(unsigned int oparg)
{
return oparg <= 0xff ? 2 :
oparg <= 0xffff ? 4 :
oparg <= 0xffffff ? 6 :
8;
}
/* Spits out op/oparg pair using ilen bytes. codestr should be pointed at the
desired location of the first EXTENDED_ARG */
static void
write_op_arg(unsigned char *codestr, unsigned char opcode,
unsigned int oparg, int ilen)
{
switch (ilen) {
case 8:
*codestr++ = EXTENDED_ARG;
*codestr++ = (oparg >> 24) & 0xff;
case 6:
*codestr++ = EXTENDED_ARG;
*codestr++ = (oparg >> 16) & 0xff;
case 4:
*codestr++ = EXTENDED_ARG;
*codestr++ = (oparg >> 8) & 0xff;
case 2:
*codestr++ = opcode;
*codestr++ = oparg & 0xff;
break;
default:
assert(0);
}
}
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