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x86: avoid string copy when swapping Vex.W controlled operands

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Now that op_out[] is an array of pointers, there's no need anymore to
copy strings. Simply swap the pointers.
This commit is contained in:
Jan Beulich
2022-06-13 09:52:59 +02:00
parent eebc56d682
commit 32f06c69f2
1 changed files with 8 additions and 6 deletions
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14
opcodes/i386-dis.c
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@ -13473,9 +13473,10 @@ OP_VexW (instr_info *ins, int bytemode, int sizeflag)
if (ins->vex.w)
{
/* Swap 2nd and 3rd operands. */
strcpy (ins->scratchbuf, ins->op_out[2]);
strcpy (ins->op_out[2], ins->op_out[1]);
strcpy (ins->op_out[1], ins->scratchbuf);
char *tmp = ins->op_out[2];
ins->op_out[2] = ins->op_out[1];
ins->op_out[1] = tmp;
}
}
@ -13503,9 +13504,10 @@ OP_REG_VexI4 (instr_info *ins, int bytemode, int sizeflag ATTRIBUTE_UNUSED)
if (ins->vex.w)
{
/* Swap 3rd and 4th operands. */
strcpy (ins->scratchbuf, ins->op_out[3]);
strcpy (ins->op_out[3], ins->op_out[2]);
strcpy (ins->op_out[2], ins->scratchbuf);
char *tmp = ins->op_out[3];
ins->op_out[3] = ins->op_out[2];
ins->op_out[2] = tmp;
}
}