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KVM: x86 emulator: Use opcode::execute for BT family

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BT : 0F A3
BTS: 0F AB
BTR: 0F B3
BTC: 0F BB

Group 8: 0F BA

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2011-11-22 15:17:48 +09:00 committed by Avi Kivity
parent d7841a4b1b
commit ce7faab24f
1 changed files with 38 additions and 39 deletions
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77
arch/x86/kvm/emulate.c
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@ -2813,6 +2813,35 @@ static int em_sti(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
static int em_bt(struct x86_emulate_ctxt *ctxt)
{
/* Disable writeback. */
ctxt->dst.type = OP_NONE;
/* only subword offset */
ctxt->src.val &= (ctxt->dst.bytes << 3) - 1;
emulate_2op_SrcV_nobyte(ctxt, "bt");
return X86EMUL_CONTINUE;
}
static int em_bts(struct x86_emulate_ctxt *ctxt)
{
emulate_2op_SrcV_nobyte(ctxt, "bts");
return X86EMUL_CONTINUE;
}
static int em_btr(struct x86_emulate_ctxt *ctxt)
{
emulate_2op_SrcV_nobyte(ctxt, "btr");
return X86EMUL_CONTINUE;
}
static int em_btc(struct x86_emulate_ctxt *ctxt)
{
emulate_2op_SrcV_nobyte(ctxt, "btc");
return X86EMUL_CONTINUE;
}
static bool valid_cr(int nr)
{
switch (nr) {
@ -3117,10 +3146,10 @@ static struct group_dual group7 = { {
static struct opcode group8[] = {
N, N, N, N,
D(DstMem | SrcImmByte | ModRM),
D(DstMem | SrcImmByte | ModRM | Lock | PageTable),
D(DstMem | SrcImmByte | ModRM | Lock),
D(DstMem | SrcImmByte | ModRM | Lock | PageTable),
I(DstMem | SrcImmByte | ModRM, em_bt),
I(DstMem | SrcImmByte | ModRM | Lock | PageTable, em_bts),
I(DstMem | SrcImmByte | ModRM | Lock, em_btr),
I(DstMem | SrcImmByte | ModRM | Lock | PageTable, em_btc),
};
static struct group_dual group9 = { {
@ -3299,26 +3328,27 @@ static struct opcode twobyte_table[256] = {
X16(D(ByteOp | DstMem | SrcNone | ModRM| Mov)),
/* 0xA0 - 0xA7 */
I(Stack | Src2FS, em_push_sreg), I(Stack | Src2FS, em_pop_sreg),
DI(ImplicitOps, cpuid), D(DstMem | SrcReg | ModRM | BitOp),
DI(ImplicitOps, cpuid), I(DstMem | SrcReg | ModRM | BitOp, em_bt),
D(DstMem | SrcReg | Src2ImmByte | ModRM),
D(DstMem | SrcReg | Src2CL | ModRM), N, N,
/* 0xA8 - 0xAF */
I(Stack | Src2GS, em_push_sreg), I(Stack | Src2GS, em_pop_sreg),
DI(ImplicitOps, rsm),
D(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable),
I(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_bts),
D(DstMem | SrcReg | Src2ImmByte | ModRM),
D(DstMem | SrcReg | Src2CL | ModRM),
D(ModRM), I(DstReg | SrcMem | ModRM, em_imul),
/* 0xB0 - 0xB7 */
D2bv(DstMem | SrcReg | ModRM | Lock | PageTable),
I(DstReg | SrcMemFAddr | ModRM | Src2SS, em_lseg),
D(DstMem | SrcReg | ModRM | BitOp | Lock),
I(DstMem | SrcReg | ModRM | BitOp | Lock, em_btr),
I(DstReg | SrcMemFAddr | ModRM | Src2FS, em_lseg),
I(DstReg | SrcMemFAddr | ModRM | Src2GS, em_lseg),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xB8 - 0xBF */
N, N,
G(BitOp, group8), D(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable),
G(BitOp, group8),
I(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_btc),
D(DstReg | SrcMem | ModRM), D(DstReg | SrcMem | ModRM),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xC0 - 0xCF */
@ -4103,21 +4133,10 @@ twobyte_insn:
case 0x90 ... 0x9f: /* setcc r/m8 */
ctxt->dst.val = test_cc(ctxt->b, ctxt->eflags);
break;
case 0xa3:
bt: /* bt */
ctxt->dst.type = OP_NONE;
/* only subword offset */
ctxt->src.val &= (ctxt->dst.bytes << 3) - 1;
emulate_2op_SrcV_nobyte(ctxt, "bt");
break;
case 0xa4: /* shld imm8, r, r/m */
case 0xa5: /* shld cl, r, r/m */
emulate_2op_cl(ctxt, "shld");
break;
case 0xab:
bts: /* bts */
emulate_2op_SrcV_nobyte(ctxt, "bts");
break;
case 0xac: /* shrd imm8, r, r/m */
case 0xad: /* shrd cl, r, r/m */
emulate_2op_cl(ctxt, "shrd");
@ -4141,31 +4160,11 @@ twobyte_insn:
ctxt->dst.addr.reg = (unsigned long *)&ctxt->regs[VCPU_REGS_RAX];
}
break;
case 0xb3:
btr: /* btr */
emulate_2op_SrcV_nobyte(ctxt, "btr");
break;
case 0xb6 ... 0xb7: /* movzx */
ctxt->dst.bytes = ctxt->op_bytes;
ctxt->dst.val = (ctxt->d & ByteOp) ? (u8) ctxt->src.val
: (u16) ctxt->src.val;
break;
case 0xba: /* Grp8 */
switch (ctxt->modrm_reg & 3) {
case 0:
goto bt;
case 1:
goto bts;
case 2:
goto btr;
case 3:
goto btc;
}
break;
case 0xbb:
btc: /* btc */
emulate_2op_SrcV_nobyte(ctxt, "btc");
break;
case 0xbc: { /* bsf */
u8 zf;
__asm__ ("bsf %2, %0; setz %1"