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x86-64-asm: Implement cmpxchg16b

Michael Matz committed 10 years ago

Commit 9e0af6d1 parent ca8c1cd2 files · +6 −0Browse files

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2 files
  1. tests/asmtest.S +3 −0
  2. x86_64-asm.h +3 −0
tests/asmtest.S+3−0
@@ -535,6 +535,9 @@ cmpxchgw %ax, 0x1000 · 534 unmodified lines
535535 cmpxchgl %eax, 0x1000
536536 invlpg 0x1000
537537 cmpxchg8b 0x1002
538+#ifdef __x86_64__
539+cmpxchg16b (%rax)
540+#endif
538541
539542 fcmovb %st(5), %st
540543 fcmove %st(5), %st
x86_64-asm.h+3−0
@@ -394,6 +394,9 @@ ALT(DEF_ASM_OP2(cmpxchgb, 0x0fb0, 0, OPC_MODRM | OPC_BWLX, OPT_REG, OPT_REG | OP · 393 unmodified lines
394394 /* pentium */
395395 DEF_ASM_OP1(cmpxchg8b, 0x0fc7, 1, OPC_MODRM, OPT_EA )
396396
397+ /* AMD 64 */
398+ DEF_ASM_OP1(cmpxchg16b, 0x480fc7, 1, OPC_MODRM, OPT_EA )
399+
397400 /* pentium pro */
398401 ALT(DEF_ASM_OP2(cmovo, 0x0f40, 0, OPC_MODRM | OPC_TEST | OPC_WLX, OPT_REGW | OPT_EA, OPT_REGW))
399402

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