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x86-64-asm: Implement cmpxchg16b

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This commit is contained in:
Michael Matz 2016-08-08 20:28:21 +02:00
parent ca8c1cd643
commit 9e0af6d2b5
2 changed files with 6 additions and 0 deletions
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3
tests/asmtest.S
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@ -535,6 +535,9 @@ cmpxchgw %ax, 0x1000
cmpxchgl %eax, 0x1000
invlpg 0x1000
cmpxchg8b 0x1002
#ifdef __x86_64__
cmpxchg16b (%rax)
#endif
fcmovb %st(5), %st
fcmove %st(5), %st

3
x86_64-asm.h
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@ -394,6 +394,9 @@ ALT(DEF_ASM_OP2(cmpxchgb, 0x0fb0, 0, OPC_MODRM | OPC_BWLX, OPT_REG, OPT_REG | OP
/* pentium */
DEF_ASM_OP1(cmpxchg8b, 0x0fc7, 1, OPC_MODRM, OPT_EA )
/* AMD 64 */
DEF_ASM_OP1(cmpxchg16b, 0x480fc7, 1, OPC_MODRM, OPT_EA )
/* pentium pro */
ALT(DEF_ASM_OP2(cmovo, 0x0f40, 0, OPC_MODRM | OPC_TEST | OPC_WLX, OPT_REGW | OPT_EA, OPT_REGW))