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x86: Improve cmov handling

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cmov can accept multi sizes, but is also a OPC_TEST opcode,
deal with this.
This commit is contained in:
Michael Matz
2016-05-11 18:54:24 +02:00
parent 9645b62a65
commit bd93dc6923
4 changed files with 11 additions and 9 deletions
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5
i386-asm.c
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@ -659,6 +659,11 @@ ST_FUNC void asm_opcode(TCCState *s1, int opcode)
} else if (pa->instr_type & OPC_TEST) {
if (!(opcode >= pa->sym && opcode < pa->sym + NB_TEST_OPCODES))
continue;
/* cmovxx is a test opcode but accepts multiple sizes.
TCC doesn't accept the suffixed mnemonic, instead we
simply force size autodetection always. */
if (pa->instr_type & OPC_WLX)
s = NBWLX - 1;
} else if (pa->instr_type & OPC_B) {
#ifdef TCC_TARGET_X86_64
/* Some instructions don't have the full size but only