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Commit 4d758349 authored by Avi Kivity's avatar Avi Kivity Committed by Marcelo Tosatti
Browse files

KVM: x86 emulator: convert 2-operand IMUL to fastop 



Reviewed-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi.kivity@gmail.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 11c363ba

arch/x86/kvm/emulate.c

+6 −8
Original line number Diff line number Diff line
@@ -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),