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authorAvi Kivity <avi.kivity@gmail.com>2013-01-19 19:51:54 +0200
committerMarcelo Tosatti <mtosatti@redhat.com>2013-01-23 22:15:37 -0200
commit11c363ba8f8eb163c275920b4a27697eb43da6e9 (patch)
tree0f5f34329c3fd607d0d5477db2fbcadb78bb46e0 /arch/x86/kvm/emulate.c
parent95413dc41398fec2518abf4e0449503b1306dcbc (diff)
KVM: x86 emulator: convert BT/BTS/BTR/BTC/BSF/BSR to fastop
Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi.kivity@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
-rw-r--r--arch/x86/kvm/emulate.c76
1 files changed, 26 insertions, 50 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index edb09e9c111c..62014dca9e26 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -478,6 +478,15 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt)
ON64(FOP2E(op##q, rax, rbx)) \
FOP_END
+/* 2 operand, word only */
+#define FASTOP2W(op) \
+ FOP_START(op) \
+ FOPNOP() \
+ FOP2E(op##w, ax, bx) \
+ FOP2E(op##l, eax, ebx) \
+ ON64(FOP2E(op##q, rax, rbx)) \
+ FOP_END
+
/* 2 operand, src is CL */
#define FASTOP2CL(op) \
FOP_START(op) \
@@ -2066,6 +2075,13 @@ FASTOP2CL(shl);
FASTOP2CL(shr);
FASTOP2CL(sar);
+FASTOP2W(bsf);
+FASTOP2W(bsr);
+FASTOP2W(bt);
+FASTOP2W(bts);
+FASTOP2W(btr);
+FASTOP2W(btc);
+
static int em_mul_ex(struct x86_emulate_ctxt *ctxt)
{
u8 ex = 0;
@@ -3377,47 +3393,6 @@ 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 int em_bsf(struct x86_emulate_ctxt *ctxt)
-{
- emulate_2op_SrcV_nobyte(ctxt, "bsf");
- return X86EMUL_CONTINUE;
-}
-
-static int em_bsr(struct x86_emulate_ctxt *ctxt)
-{
- emulate_2op_SrcV_nobyte(ctxt, "bsr");
- return X86EMUL_CONTINUE;
-}
-
static int em_cpuid(struct x86_emulate_ctxt *ctxt)
{
u32 eax, ebx, ecx, edx;
@@ -3773,10 +3748,10 @@ static const struct group_dual group7 = { {
static const struct opcode group8[] = {
N, N, N, N,
- I(DstMem | SrcImmByte, em_bt),
- I(DstMem | SrcImmByte | Lock | PageTable, em_bts),
- I(DstMem | SrcImmByte | Lock, em_btr),
- I(DstMem | SrcImmByte | Lock | PageTable, em_btc),
+ F(DstMem | SrcImmByte | NoWrite, em_bt),
+ F(DstMem | SrcImmByte | Lock | PageTable, em_bts),
+ F(DstMem | SrcImmByte | Lock, em_btr),
+ F(DstMem | SrcImmByte | Lock | PageTable, em_btc),
};
static const struct group_dual group9 = { {
@@ -4025,28 +4000,29 @@ static const 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),
- II(ImplicitOps, em_cpuid, cpuid), I(DstMem | SrcReg | ModRM | BitOp, em_bt),
+ II(ImplicitOps, em_cpuid, cpuid),
+ F(DstMem | SrcReg | ModRM | BitOp | NoWrite, em_bt),
F(DstMem | SrcReg | Src2ImmByte | ModRM, em_shld),
F(DstMem | SrcReg | Src2CL | ModRM, em_shld), N, N,
/* 0xA8 - 0xAF */
I(Stack | Src2GS, em_push_sreg), I(Stack | Src2GS, em_pop_sreg),
DI(ImplicitOps, rsm),
- I(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_bts),
+ F(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_bts),
F(DstMem | SrcReg | Src2ImmByte | ModRM, em_shrd),
F(DstMem | SrcReg | Src2CL | ModRM, em_shrd),
D(ModRM), I(DstReg | SrcMem | ModRM, em_imul),
/* 0xB0 - 0xB7 */
I2bv(DstMem | SrcReg | ModRM | Lock | PageTable, em_cmpxchg),
I(DstReg | SrcMemFAddr | ModRM | Src2SS, em_lseg),
- I(DstMem | SrcReg | ModRM | BitOp | Lock, em_btr),
+ F(DstMem | SrcReg | ModRM | BitOp | Lock, em_btr),
I(DstReg | SrcMemFAddr | ModRM | Src2FS, em_lseg),
I(DstReg | SrcMemFAddr | ModRM | Src2GS, em_lseg),
D(DstReg | SrcMem8 | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xB8 - 0xBF */
N, N,
G(BitOp, group8),
- I(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_btc),
- I(DstReg | SrcMem | ModRM, em_bsf), I(DstReg | SrcMem | ModRM, em_bsr),
+ F(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_btc),
+ 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),

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