diff options
| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2010-08-17 09:19:34 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:51:06 +0200 |
| commit | 92f738a52b53dc13b5dd5753634bdb8c59ac9815 (patch) | |
| tree | 792860967186aedc0d94e0c5198e49628960bb84 /arch/x86/kvm/emulate.c | |
| parent | 31be40b3985f09c0c89b9e28a8206df32adba842 (diff) | |
KVM: x86 emulator: add XADD instruction emulation
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>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 003713041ce6..0c08bffe6cb4 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -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 : |