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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 <yjwei@cn.fujitsu.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Wei Yongjun 2010-08-09 11:39:14 +08:00 committed by Avi Kivity
parent 3885f18fe3
commit ba7ff2b76d
1 changed files with 4 additions and 7 deletions
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11
arch/x86/kvm/emulate.c
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@ -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 */