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authorAvi Kivity <avi.kivity@gmail.com>2013-02-09 11:31:51 +0200
committerGleb Natapov <gleb@redhat.com>2013-05-21 15:43:24 +0300
commite47a5f5fb715b90b40747e9e235de557c6abd56c (patch)
tree92283dc4e419898b3cfdcd6597a6e05065c24e26 /arch/x86/kvm/emulate.c
parent203831e8e4bd9ab3b2f9f86c73c74fe912e06ac5 (diff)
KVM: x86 emulator: convert XADD to fastop
Signed-off-by: Avi Kivity <avi.kivity@gmail.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
-rw-r--r--arch/x86/kvm/emulate.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d71aac0bf32f..9ebe95c5836e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -853,6 +853,8 @@ FASTOP2W(bts);
FASTOP2W(btr);
FASTOP2W(btc);
+FASTOP2(xadd);
+
static u8 test_cc(unsigned int condition, unsigned long flags)
{
u8 rc;
@@ -3861,7 +3863,7 @@ static const struct opcode twobyte_table[256] = {
F(DstReg | SrcMem | ModRM, em_bsf), F(DstReg | SrcMem | ModRM, em_bsr),
D(DstReg | SrcMem8 | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xC0 - 0xC7 */
- D2bv(DstMem | SrcReg | ModRM | Lock),
+ F2bv(DstMem | SrcReg | ModRM | SrcWrite | Lock, em_xadd),
N, D(DstMem | SrcReg | ModRM | Mov),
N, N, N, GD(0, &group9),
/* 0xC8 - 0xCF */
@@ -4698,12 +4700,6 @@ twobyte_insn:
ctxt->dst.val = (ctxt->src.bytes == 1) ? (s8) ctxt->src.val :
(s16) ctxt->src.val;
break;
- case 0xc0 ... 0xc1: /* xadd */
- fastop(ctxt, em_add);
- /* Write back the register source. */
- ctxt->src.val = ctxt->dst.orig_val;
- write_register_operand(&ctxt->src);
- break;
case 0xc3: /* movnti */
ctxt->dst.bytes = ctxt->op_bytes;
ctxt->dst.val = (ctxt->op_bytes == 4) ? (u32) ctxt->src.val :

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