From 4d7583493e1777f42cc0fda9573d312e4753aa3c Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sat, 19 Jan 2013 19:51:55 +0200 Subject: [PATCH] KVM: x86 emulator: convert 2-operand IMUL to fastop Reviewed-by: Gleb Natapov Signed-off-by: Avi Kivity Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/emulate.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 62014dc..45ddec8 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -441,6 +441,8 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt) } \ } while (0) +static int fastop(struct x86_emulate_ctxt *ctxt, void (*fop)(struct fastop *)); + #define FOP_ALIGN ".align " __stringify(FASTOP_SIZE) " \n\t" #define FOP_RET "ret \n\t" @@ -3051,6 +3053,8 @@ FASTOP2(test); FASTOP3WCL(shld); FASTOP3WCL(shrd); +FASTOP2W(imul); + static int em_xchg(struct x86_emulate_ctxt *ctxt) { /* Write back the register source. */ @@ -3063,16 +3067,10 @@ static int em_xchg(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } -static int em_imul(struct x86_emulate_ctxt *ctxt) -{ - emulate_2op_SrcV_nobyte(ctxt, "imul"); - return X86EMUL_CONTINUE; -} - static int em_imul_3op(struct x86_emulate_ctxt *ctxt) { ctxt->dst.val = ctxt->src2.val; - return em_imul(ctxt); + return fastop(ctxt, em_imul); } static int em_cwd(struct x86_emulate_ctxt *ctxt) @@ -4010,7 +4008,7 @@ static const struct opcode twobyte_table[256] = { 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), + D(ModRM), F(DstReg | SrcMem | ModRM, em_imul), /* 0xB0 - 0xB7 */ I2bv(DstMem | SrcReg | ModRM | Lock | PageTable, em_cmpxchg), I(DstReg | SrcMemFAddr | ModRM | Src2SS, em_lseg), -- 2.7.4