/
prog.go
292 lines (280 loc) · 16.1 KB
/
prog.go
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package x86
import (
"cmd/compile/internal/gc"
"cmd/internal/obj"
"cmd/internal/obj/x86"
)
var (
AX = RtoB(x86.REG_AX)
BX = RtoB(x86.REG_BX)
CX = RtoB(x86.REG_CX)
DX = RtoB(x86.REG_DX)
DI = RtoB(x86.REG_DI)
SI = RtoB(x86.REG_SI)
LeftRdwr uint32 = gc.LeftRead | gc.LeftWrite
RightRdwr uint32 = gc.RightRead | gc.RightWrite
)
// This table gives the basic information about instruction
// generated by the compiler and processed in the optimizer.
// See opt.h for bit definitions.
//
// Instructions not generated need not be listed.
// As an exception to that rule, we typically write down all the
// size variants of an operation even if we just use a subset.
//
// The table is formatted for 8-space tabs.
var progtable = [x86.ALAST]obj.ProgInfo{
obj.ATYPE: {Flags: gc.Pseudo | gc.Skip},
obj.ATEXT: {Flags: gc.Pseudo},
obj.AFUNCDATA: {Flags: gc.Pseudo},
obj.APCDATA: {Flags: gc.Pseudo},
obj.AUNDEF: {Flags: gc.Break},
obj.AUSEFIELD: {Flags: gc.OK},
obj.ACHECKNIL: {Flags: gc.LeftRead},
obj.AVARDEF: {Flags: gc.Pseudo | gc.RightWrite},
obj.AVARKILL: {Flags: gc.Pseudo | gc.RightWrite},
// NOP is an internal no-op that also stands
// for USED and SET annotations, not the Intel opcode.
obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite},
x86.AADCL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry},
x86.AADCW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry},
x86.AADDB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AADDL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AADDW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AADDSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr},
x86.AADDSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr},
x86.AANDB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AANDL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AANDW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry},
obj.ACALL: {Flags: gc.RightAddr | gc.Call | gc.KillCarry},
x86.ACDQ: {Flags: gc.OK, Reguse: AX, Regset: AX | DX},
x86.ACWD: {Flags: gc.OK, Reguse: AX, Regset: AX | DX},
x86.ACLD: {Flags: gc.OK},
x86.ASTD: {Flags: gc.OK},
x86.ACMPB: {Flags: gc.SizeB | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ACMPL: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ACMPW: {Flags: gc.SizeW | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ACOMISD: {Flags: gc.SizeD | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ACOMISS: {Flags: gc.SizeF | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ACVTSD2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTSD2SS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTSL2SD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTSL2SS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTSS2SD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTSS2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTTSD2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ACVTTSS2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.ADECB: {Flags: gc.SizeB | RightRdwr},
x86.ADECL: {Flags: gc.SizeL | RightRdwr},
x86.ADECW: {Flags: gc.SizeW | RightRdwr},
x86.ADIVB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX},
x86.ADIVL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX},
x86.ADIVW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX},
x86.ADIVSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr},
x86.ADIVSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr},
x86.AFLDCW: {Flags: gc.SizeW | gc.LeftAddr},
x86.AFSTCW: {Flags: gc.SizeW | gc.RightAddr},
x86.AFSTSW: {Flags: gc.SizeW | gc.RightAddr | gc.RightWrite},
x86.AFADDD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFADDDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFADDF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AFCOMD: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead},
x86.AFCOMDP: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead},
x86.AFCOMDPP: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead},
x86.AFCOMF: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead},
x86.AFCOMFP: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead},
x86.AFUCOMIP: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead},
x86.AFCHS: {Flags: gc.SizeD | RightRdwr}, // also SizeF
x86.AFDIVDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFDIVF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AFDIVD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFDIVRDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFDIVRF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AFDIVRD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFXCHD: {Flags: gc.SizeD | LeftRdwr | RightRdwr},
x86.AFSUBD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFSUBDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFSUBF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AFSUBRD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFSUBRDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFSUBRF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AFMOVD: {Flags: gc.SizeD | gc.LeftAddr | gc.RightWrite},
x86.AFMOVF: {Flags: gc.SizeF | gc.LeftAddr | gc.RightWrite},
x86.AFMOVL: {Flags: gc.SizeL | gc.LeftAddr | gc.RightWrite},
x86.AFMOVW: {Flags: gc.SizeW | gc.LeftAddr | gc.RightWrite},
x86.AFMOVV: {Flags: gc.SizeQ | gc.LeftAddr | gc.RightWrite},
// These instructions are marked as RightAddr
// so that the register optimizer does not try to replace the
// memory references with integer register references.
// But they do not use the previous value at the address, so
// we also mark them RightWrite.
x86.AFMOVDP: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.RightAddr},
x86.AFMOVFP: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.RightAddr},
x86.AFMOVLP: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.RightAddr},
x86.AFMOVWP: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.RightAddr},
x86.AFMOVVP: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.RightAddr},
x86.AFMULD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFMULDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr},
x86.AFMULF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr},
x86.AIDIVB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX},
x86.AIDIVL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX},
x86.AIDIVW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX},
x86.AIMULB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX},
x86.AIMULL: {Flags: gc.SizeL | gc.LeftRead | gc.ImulAXDX | gc.SetCarry},
x86.AIMULW: {Flags: gc.SizeW | gc.LeftRead | gc.ImulAXDX | gc.SetCarry},
x86.AINCB: {Flags: gc.SizeB | RightRdwr},
x86.AINCL: {Flags: gc.SizeL | RightRdwr},
x86.AINCW: {Flags: gc.SizeW | RightRdwr},
x86.AJCC: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJCS: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJEQ: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJGE: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJGT: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJHI: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJLE: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJLS: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJLT: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJMI: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJNE: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJOC: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJOS: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJPC: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJPL: {Flags: gc.Cjmp | gc.UseCarry},
x86.AJPS: {Flags: gc.Cjmp | gc.UseCarry},
obj.AJMP: {Flags: gc.Jump | gc.Break | gc.KillCarry},
x86.ALEAL: {Flags: gc.LeftAddr | gc.RightWrite},
x86.AMOVBLSX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVBLZX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVBWSX: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVBWZX: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVWLSX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVWLZX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv},
x86.AMOVB: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move},
x86.AMOVL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move},
x86.AMOVW: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move},
x86.AMOVSB: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI},
x86.AMOVSL: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI},
x86.AMOVSW: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI},
obj.ADUFFCOPY: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI | CX},
x86.AMOVSD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move},
x86.AMOVSS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move},
// We use MOVAPD as a faster synonym for MOVSD.
x86.AMOVAPD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move},
x86.AMULB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX},
x86.AMULL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX | DX},
x86.AMULW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX | DX},
x86.AMULSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr},
x86.AMULSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr},
x86.ANEGB: {Flags: gc.SizeB | RightRdwr | gc.SetCarry},
x86.ANEGL: {Flags: gc.SizeL | RightRdwr | gc.SetCarry},
x86.ANEGW: {Flags: gc.SizeW | RightRdwr | gc.SetCarry},
x86.ANOTB: {Flags: gc.SizeB | RightRdwr},
x86.ANOTL: {Flags: gc.SizeL | RightRdwr},
x86.ANOTW: {Flags: gc.SizeW | RightRdwr},
x86.AORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.APOPL: {Flags: gc.SizeL | gc.RightWrite},
x86.APUSHL: {Flags: gc.SizeL | gc.LeftRead},
x86.ARCLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.ARCLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.ARCLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.ARCRB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.ARCRL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.ARCRW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry},
x86.AREP: {Flags: gc.OK, Reguse: CX, Regset: CX},
x86.AREPN: {Flags: gc.OK, Reguse: CX, Regset: CX},
obj.ARET: {Flags: gc.Break | gc.KillCarry},
x86.AROLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.AROLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.AROLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ARORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ARORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ARORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASAHF: {Flags: gc.OK, Reguse: AX, Regset: AX},
x86.ASALB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASALL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASALW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASARB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASARL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASARW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASBBB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry},
x86.ASBBL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry},
x86.ASBBW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry},
x86.ASETCC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETCS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETEQ: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETGE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETGT: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETHI: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETLE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETLS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETLT: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETMI: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETNE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETOC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETOS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETPC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETPL: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASETPS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry},
x86.ASHLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASHLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASHLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASHRB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASHRL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASHRW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry},
x86.ASTOSB: {Flags: gc.OK, Reguse: AX | DI, Regset: DI},
x86.ASTOSL: {Flags: gc.OK, Reguse: AX | DI, Regset: DI},
x86.ASTOSW: {Flags: gc.OK, Reguse: AX | DI, Regset: DI},
obj.ADUFFZERO: {Flags: gc.OK, Reguse: AX | DI, Regset: DI},
x86.ASUBB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.ASUBL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.ASUBW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.ASUBSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr},
x86.ASUBSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr},
x86.ATESTB: {Flags: gc.SizeB | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ATESTL: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.ATESTW: {Flags: gc.SizeW | gc.LeftRead | gc.RightRead | gc.SetCarry},
x86.AUCOMISD: {Flags: gc.SizeD | gc.LeftRead | gc.RightRead},
x86.AUCOMISS: {Flags: gc.SizeF | gc.LeftRead | gc.RightRead},
x86.AXCHGB: {Flags: gc.SizeB | LeftRdwr | RightRdwr},
x86.AXCHGL: {Flags: gc.SizeL | LeftRdwr | RightRdwr},
x86.AXCHGW: {Flags: gc.SizeW | LeftRdwr | RightRdwr},
x86.AXORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AXORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry},
x86.AXORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry},
}
func proginfo(p *obj.Prog) {
info := &p.Info
*info = progtable[p.As]
if info.Flags == 0 {
gc.Fatal("unknown instruction %v", p)
}
if (info.Flags&gc.ShiftCX != 0) && p.From.Type != obj.TYPE_CONST {
info.Reguse |= CX
}
if info.Flags&gc.ImulAXDX != 0 {
if p.To.Type == obj.TYPE_NONE {
info.Reguse |= AX
info.Regset |= AX | DX
} else {
info.Flags |= RightRdwr
}
}
// Addressing makes some registers used.
if p.From.Type == obj.TYPE_MEM && p.From.Name == obj.NAME_NONE {
info.Regindex |= RtoB(int(p.From.Reg))
}
if p.From.Index != x86.REG_NONE {
info.Regindex |= RtoB(int(p.From.Index))
}
if p.To.Type == obj.TYPE_MEM && p.To.Name == obj.NAME_NONE {
info.Regindex |= RtoB(int(p.To.Reg))
}
if p.To.Index != x86.REG_NONE {
info.Regindex |= RtoB(int(p.To.Index))
}
}