Golang程序
|
175行
|
7.52 KB
// Copyright 2014 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 arm64
import (
"cmd/compile/internal/gc"
"cmd/internal/obj"
"cmd/internal/obj/arm64"
)
const (
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 = [arm64.ALAST]obj.ProgInfo{
obj.ATYPE: {gc.Pseudo | gc.Skip, 0, 0, 0},
obj.ATEXT: {gc.Pseudo, 0, 0, 0},
obj.AFUNCDATA: {gc.Pseudo, 0, 0, 0},
obj.APCDATA: {gc.Pseudo, 0, 0, 0},
obj.AUNDEF: {gc.Break, 0, 0, 0},
obj.AUSEFIELD: {gc.OK, 0, 0, 0},
obj.ACHECKNIL: {gc.LeftRead, 0, 0, 0},
obj.AVARDEF: {gc.Pseudo | gc.RightWrite, 0, 0, 0},
obj.AVARKILL: {gc.Pseudo | gc.RightWrite, 0, 0, 0},
// NOP is an internal no-op that also stands
// for USED and SET annotations, not the Power opcode.
obj.ANOP: {gc.LeftRead | gc.RightWrite, 0, 0, 0},
arm64.AHINT: {gc.OK, 0, 0, 0},
// Integer
arm64.AADD: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ASUB: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ANEG: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AAND: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AORR: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AEOR: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AMUL: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ASMULL: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AUMULL: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ASMULH: {gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AUMULH: {gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ASDIV: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AUDIV: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ALSL: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ALSR: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AASR: {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.ACMP: {gc.SizeQ | gc.LeftRead | gc.RegRead, 0, 0, 0},
// Floating point.
arm64.AFADDD: {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFADDS: {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFSUBD: {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFSUBS: {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFNEGD: {gc.SizeD | gc.LeftRead | gc.RightWrite, 0, 0, 0},
arm64.AFNEGS: {gc.SizeF | gc.LeftRead | gc.RightWrite, 0, 0, 0},
arm64.AFSQRTD: {gc.SizeD | gc.LeftRead | gc.RightWrite, 0, 0, 0},
arm64.AFMULD: {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFMULS: {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFDIVD: {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFDIVS: {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
arm64.AFCMPD: {gc.SizeD | gc.LeftRead | gc.RegRead, 0, 0, 0},
arm64.AFCMPS: {gc.SizeF | gc.LeftRead | gc.RegRead, 0, 0, 0},
// float -> integer
arm64.AFCVTZSD: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZSS: {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZSDW: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZSSW: {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZUD: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZUS: {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZUDW: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTZUSW: {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
// float -> float
arm64.AFCVTSD: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AFCVTDS: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
// integer -> float
arm64.ASCVTFD: {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.ASCVTFS: {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.ASCVTFWD: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.ASCVTFWS: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AUCVTFD: {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AUCVTFS: {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AUCVTFWD: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
arm64.AUCVTFWS: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
// Moves
arm64.AMOVB: {gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVBU: {gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVH: {gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVHU: {gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVW: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVWU: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AMOVD: {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move, 0, 0, 0},
arm64.AFMOVS: {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
arm64.AFMOVD: {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move, 0, 0, 0},
// Jumps
arm64.AB: {gc.Jump | gc.Break, 0, 0, 0},
arm64.ABL: {gc.Call, 0, 0, 0},
arm64.ABEQ: {gc.Cjmp, 0, 0, 0},
arm64.ABNE: {gc.Cjmp, 0, 0, 0},
arm64.ABGE: {gc.Cjmp, 0, 0, 0},
arm64.ABLT: {gc.Cjmp, 0, 0, 0},
arm64.ABGT: {gc.Cjmp, 0, 0, 0},
arm64.ABLE: {gc.Cjmp, 0, 0, 0},
arm64.ABLO: {gc.Cjmp, 0, 0, 0},
arm64.ABLS: {gc.Cjmp, 0, 0, 0},
arm64.ABHI: {gc.Cjmp, 0, 0, 0},
arm64.ABHS: {gc.Cjmp, 0, 0, 0},
arm64.ACBZ: {gc.Cjmp, 0, 0, 0},
arm64.ACBNZ: {gc.Cjmp, 0, 0, 0},
obj.ARET: {gc.Break, 0, 0, 0},
obj.ADUFFZERO: {gc.Call, 0, 0, 0},
obj.ADUFFCOPY: {gc.Call, 0, 0, 0},
}
func proginfo(p *obj.Prog) {
info := &p.Info
*info = progtable[p.As]
if info.Flags == 0 {
gc.Fatal("proginfo: unknown instruction %v", p)
}
if (info.Flags&gc.RegRead != 0) && p.Reg == 0 {
info.Flags &^= gc.RegRead
info.Flags |= gc.RightRead /*CanRegRead |*/
}
if (p.From.Type == obj.TYPE_MEM || p.From.Type == obj.TYPE_ADDR) && p.From.Reg != 0 {
info.Regindex |= RtoB(int(p.From.Reg))
if p.Scond != 0 {
info.Regset |= RtoB(int(p.From.Reg))
}
}
if (p.To.Type == obj.TYPE_MEM || p.To.Type == obj.TYPE_ADDR) && p.To.Reg != 0 {
info.Regindex |= RtoB(int(p.To.Reg))
if p.Scond != 0 {
info.Regset |= RtoB(int(p.To.Reg))
}
}
if p.From.Type == obj.TYPE_ADDR && p.From.Sym != nil && (info.Flags&gc.LeftRead != 0) {
info.Flags &^= gc.LeftRead
info.Flags |= gc.LeftAddr
}
if p.As == obj.ADUFFZERO {
info.Reguse |= RtoB(arm64.REGRT1)
info.Regset |= RtoB(arm64.REGRT1)
}
if p.As == obj.ADUFFCOPY {
// TODO(austin) Revisit when duffcopy is implemented
info.Reguse |= RtoB(arm64.REGRT1) | RtoB(arm64.REGRT2) | RtoB(arm64.REG_R5)
info.Regset |= RtoB(arm64.REGRT1) | RtoB(arm64.REGRT2)
}
}