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Commit 11c363ba authored by Avi Kivity's avatar Avi Kivity Committed by Marcelo Tosatti
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KVM: x86 emulator: convert BT/BTS/BTR/BTC/BSF/BSR 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 95413dc4

arch/x86/kvm/emulate.c

+26 −50
Original line number Diff line number Diff line
@@ -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),