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authorAvi Kivity <avi.kivity@gmail.com>2013-01-19 19:51:50 +0200
committerMarcelo Tosatti <mtosatti@redhat.com>2013-01-23 22:15:33 -0200
commit0bdea06892e33afddbdc5da6df305e9fe9c41365 (patch)
tree26f836d1cbd906818b4d304bf929140a8eed9586 /arch/x86/kvm/emulate.c
parent93c05d3ef25275829d421a255271595ac219a518 (diff)
KVM: x86 emulator: Convert SHLD, SHRD 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.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 619a33d0ee0a..a21773f22107 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -454,6 +454,8 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt)
#define FOP_END \
".popsection")
+#define FOPNOP() FOP_ALIGN FOP_RET
+
#define FOP1E(op, dst) \
FOP_ALIGN #op " %" #dst " \n\t" FOP_RET
@@ -476,6 +478,18 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt)
ON64(FOP2E(op##q, rax, rbx)) \
FOP_END
+#define FOP3E(op, dst, src, src2) \
+ FOP_ALIGN #op " %" #src2 ", %" #src ", %" #dst " \n\t" FOP_RET
+
+/* 3-operand, word-only, src2=cl */
+#define FASTOP3WCL(op) \
+ FOP_START(op) \
+ FOPNOP() \
+ FOP3E(op##w, ax, bx, cl) \
+ FOP3E(op##l, eax, ebx, cl) \
+ ON64(FOP3E(op##q, rax, rbx, cl)) \
+ FOP_END
+
#define __emulate_1op_rax_rdx(ctxt, _op, _suffix, _ex) \
do { \
unsigned long _tmp; \
@@ -3036,6 +3050,9 @@ FASTOP2(xor);
FASTOP2(cmp);
FASTOP2(test);
+FASTOP3WCL(shld);
+FASTOP3WCL(shrd);
+
static int em_xchg(struct x86_emulate_ctxt *ctxt)
{
/* Write back the register source. */
@@ -4015,14 +4032,14 @@ static const struct opcode twobyte_table[256] = {
/* 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),
- D(DstMem | SrcReg | Src2ImmByte | ModRM),
- D(DstMem | SrcReg | Src2CL | ModRM), N, N,
+ 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),
- D(DstMem | SrcReg | Src2ImmByte | ModRM),
- D(DstMem | SrcReg | Src2CL | ModRM),
+ 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),
@@ -4834,14 +4851,6 @@ twobyte_insn:
case 0x90 ... 0x9f: /* setcc r/m8 */
ctxt->dst.val = test_cc(ctxt->b, ctxt->eflags);
break;
- case 0xa4: /* shld imm8, r, r/m */
- case 0xa5: /* shld cl, r, r/m */
- emulate_2op_cl(ctxt, "shld");
- break;
- case 0xac: /* shrd imm8, r, r/m */
- case 0xad: /* shrd cl, r, r/m */
- emulate_2op_cl(ctxt, "shrd");
- break;
case 0xae: /* clflush */
break;
case 0xb6 ... 0xb7: /* movzx */

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