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KVM: x86 emulator: add XADD instruction emulation

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Add XADD instruction emulation (opcode 0x0f 0xc0~0xc1)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Wei Yongjun 2010-08-17 09:19:34 +08:00 committed by Avi Kivity
parent 31be40b398
commit 92f738a52b
1 changed files with 8 additions and 1 deletions
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9
arch/x86/kvm/emulate.c
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@ -2385,7 +2385,8 @@ static struct opcode twobyte_table[256] = {
D(DstReg | SrcMem | ModRM), D(DstReg | SrcMem | ModRM),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xC0 - 0xCF */
N, N, N, D(DstMem | SrcReg | ModRM | Mov),
D(ByteOp | DstMem | SrcReg | ModRM | Lock), D(DstMem | SrcReg | ModRM | Lock),
N, D(DstMem | SrcReg | ModRM | Mov),
N, N, N, GD(0, &group9),
N, N, N, N, N, N, N, N,
/* 0xD0 - 0xDF */
@ -3531,6 +3532,12 @@ twobyte_insn:
c->dst.val = (c->d & ByteOp) ? (s8) c->src.val :
(s16) c->src.val;
break;
case 0xc0 ... 0xc1: /* xadd */
emulate_2op_SrcV("add", c->src, c->dst, ctxt->eflags);
/* Write back the register source. */
c->src.val = c->dst.orig_val;
write_register_operand(&c->src);
break;
case 0xc3: /* movnti */
c->dst.bytes = c->op_bytes;
c->dst.val = (c->op_bytes == 4) ? (u32) c->src.val :