From ba7ff2b76dcf05c4681c2648019b8301ada6f3df Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Mon, 9 Aug 2010 11:39:14 +0800 Subject: [PATCH] KVM: x86 emulator: mask group 8 instruction as BitOp Mask group 8 instruction as BitOp, so we can share the code for adjust the source operand. Signed-off-by: Wei Yongjun Reviewed-by: Paolo Bonzini Signed-off-by: Avi Kivity --- arch/x86/kvm/emulate.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 9b81cde8ffa2..a9b2b9e6a3f0 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -737,6 +737,9 @@ static void fetch_bit_operand(struct decode_cache *c) c->dst.addr.mem += (sv >> 3); } + + /* only subword offset */ + c->src.val &= (c->dst.bytes << 3) - 1; } static int read_emulated(struct x86_emulate_ctxt *ctxt, @@ -2336,7 +2339,7 @@ static struct opcode twobyte_table[256] = { D(DstReg | SrcMem16 | ModRM | Mov), /* 0xB8 - 0xBF */ N, N, - G(0, group8), D(DstMem | SrcReg | ModRM | BitOp | Lock), + G(BitOp, group8), D(DstMem | SrcReg | ModRM | BitOp | Lock), N, N, D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov), /* 0xC0 - 0xCF */ @@ -3419,8 +3422,6 @@ twobyte_insn: break; case 0xab: bts: /* bts */ - /* only subword offset */ - c->src.val &= (c->dst.bytes << 3) - 1; emulate_2op_SrcV_nobyte("bts", c->src, c->dst, ctxt->eflags); break; case 0xac: /* shrd imm8, r, r/m */ @@ -3448,8 +3449,6 @@ twobyte_insn: break; case 0xb3: btr: /* btr */ - /* only subword offset */ - c->src.val &= (c->dst.bytes << 3) - 1; emulate_2op_SrcV_nobyte("btr", c->src, c->dst, ctxt->eflags); break; case 0xb6 ... 0xb7: /* movzx */ @@ -3471,8 +3470,6 @@ twobyte_insn: break; case 0xbb: btc: /* btc */ - /* only subword offset */ - c->src.val &= (c->dst.bytes << 3) - 1; emulate_2op_SrcV_nobyte("btc", c->src, c->dst, ctxt->eflags); break; case 0xbe ... 0xbf: /* movsx */ -- 2.39.5