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KVM: x86 emulator: switch MUL/DIV to DstXacc 

Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Avi Kivity 2013-02-09 11:31:46 +02:00 committed by Gleb Natapov
parent 820207c8fc
commit ab2c5ce666
1 changed files with 8 additions and 7 deletions
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15
arch/x86/kvm/emulate.c
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@ -142,6 +142,7 @@
/* Source 2 operand type */
#define Src2Shift (31)
#define Src2None (OpNone << Src2Shift)
#define Src2Mem (OpMem << Src2Shift)
#define Src2CL (OpCL << Src2Shift)
#define Src2ImmByte (OpImmByte << Src2Shift)
#define Src2One (OpOne << Src2Shift)
@ -548,8 +549,8 @@ FOP_END;
#define __emulate_1op_rax_rdx(ctxt, _op, _suffix, _ex) \
do { \
unsigned long _tmp; \
ulong *rax = reg_rmw((ctxt), VCPU_REGS_RAX); \
ulong *rdx = reg_rmw((ctxt), VCPU_REGS_RDX); \
ulong *rax = &ctxt->dst.val; \
ulong *rdx = &ctxt->src.val; \
\
__asm__ __volatile__ ( \
_PRE_EFLAGS("0", "5", "1") \
@ -564,7 +565,7 @@ FOP_END;
_ASM_EXTABLE(1b, 3b) \
: "=m" ((ctxt)->eflags), "=&r" (_tmp), \
"+a" (*rax), "+d" (*rdx), "+qm"(_ex) \
: "i" (EFLAGS_MASK), "m" ((ctxt)->src.val)); \
: "i" (EFLAGS_MASK), "m" ((ctxt)->src2.val)); \
} while (0)
/* instruction has only one source operand, destination is implicit (e.g. mul, div, imul, idiv) */
@ -3735,10 +3736,10 @@ static const struct opcode group3[] = {
F(DstMem | SrcImm | NoWrite, em_test),
F(DstMem | SrcNone | Lock, em_not),
F(DstMem | SrcNone | Lock, em_neg),
I(SrcMem, em_mul_ex),
I(SrcMem, em_imul_ex),
I(SrcMem, em_div_ex),
I(SrcMem, em_idiv_ex),
I(DstXacc | Src2Mem, em_mul_ex),
I(DstXacc | Src2Mem, em_imul_ex),
I(DstXacc | Src2Mem, em_div_ex),
I(DstXacc | Src2Mem, em_idiv_ex),
};
static const struct opcode group4[] = {