github.com/gocuntian/go@v0.0.0-20160610041250-fee02d270bf8/src/cmd/compile/internal/arm64/prog.go (about) 1 // Copyright 2014 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package arm64 6 7 import ( 8 "cmd/compile/internal/gc" 9 "cmd/internal/obj" 10 "cmd/internal/obj/arm64" 11 ) 12 13 const ( 14 LeftRdwr uint32 = gc.LeftRead | gc.LeftWrite 15 RightRdwr uint32 = gc.RightRead | gc.RightWrite 16 ) 17 18 // This table gives the basic information about instruction 19 // generated by the compiler and processed in the optimizer. 20 // See opt.h for bit definitions. 21 // 22 // Instructions not generated need not be listed. 23 // As an exception to that rule, we typically write down all the 24 // size variants of an operation even if we just use a subset. 25 // 26 // The table is formatted for 8-space tabs. 27 var progtable = [arm64.ALAST & obj.AMask]obj.ProgInfo{ 28 obj.ATYPE: {Flags: gc.Pseudo | gc.Skip}, 29 obj.ATEXT: {Flags: gc.Pseudo}, 30 obj.AFUNCDATA: {Flags: gc.Pseudo}, 31 obj.APCDATA: {Flags: gc.Pseudo}, 32 obj.AUNDEF: {Flags: gc.Break}, 33 obj.AUSEFIELD: {Flags: gc.OK}, 34 obj.ACHECKNIL: {Flags: gc.LeftRead}, 35 obj.AVARDEF: {Flags: gc.Pseudo | gc.RightWrite}, 36 obj.AVARKILL: {Flags: gc.Pseudo | gc.RightWrite}, 37 obj.AVARLIVE: {Flags: gc.Pseudo | gc.LeftRead}, 38 39 // NOP is an internal no-op that also stands 40 // for USED and SET annotations, not the Power opcode. 41 obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite}, 42 arm64.AHINT & obj.AMask: {Flags: gc.OK}, 43 44 // Integer 45 arm64.AADD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 46 arm64.ASUB & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 47 arm64.ANEG & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 48 arm64.AAND & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 49 arm64.AORR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 50 arm64.AEOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 51 arm64.AMUL & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 52 arm64.ASMULL & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 53 arm64.AUMULL & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 54 arm64.ASMULH & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 55 arm64.AUMULH & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 56 arm64.ASDIV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 57 arm64.AUDIV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 58 arm64.ALSL & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 59 arm64.ALSR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 60 arm64.AASR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 61 arm64.ACMP & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 62 arm64.AADC & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite | gc.UseCarry}, 63 arm64.AROR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 64 arm64.AADDS & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite | gc.SetCarry}, 65 66 // Floating point. 67 arm64.AFADDD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 68 arm64.AFADDS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 69 arm64.AFSUBD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 70 arm64.AFSUBS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 71 arm64.AFNEGD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, 72 arm64.AFNEGS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, 73 arm64.AFSQRTD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, 74 arm64.AFMULD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 75 arm64.AFMULS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 76 arm64.AFDIVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 77 arm64.AFDIVS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 78 arm64.AFCMPD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, 79 arm64.AFCMPS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, 80 81 // float -> integer 82 arm64.AFCVTZSD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 83 arm64.AFCVTZSS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 84 arm64.AFCVTZSDW & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 85 arm64.AFCVTZSSW & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 86 arm64.AFCVTZUD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 87 arm64.AFCVTZUS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 88 arm64.AFCVTZUDW & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 89 arm64.AFCVTZUSW & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 90 91 // float -> float 92 arm64.AFCVTSD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 93 arm64.AFCVTDS & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 94 95 // integer -> float 96 arm64.ASCVTFD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 97 arm64.ASCVTFS & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 98 arm64.ASCVTFWD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 99 arm64.ASCVTFWS & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 100 arm64.AUCVTFD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 101 arm64.AUCVTFS & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 102 arm64.AUCVTFWD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 103 arm64.AUCVTFWS & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 104 105 // Moves 106 arm64.AMOVB & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 107 arm64.AMOVBU & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 108 arm64.AMOVH & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 109 arm64.AMOVHU & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 110 arm64.AMOVW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 111 arm64.AMOVWU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 112 arm64.AMOVD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move}, 113 arm64.AFMOVS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 114 arm64.AFMOVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move}, 115 116 // Jumps 117 arm64.AB & obj.AMask: {Flags: gc.Jump | gc.Break}, 118 arm64.ABL & obj.AMask: {Flags: gc.Call}, 119 arm64.ABEQ & obj.AMask: {Flags: gc.Cjmp}, 120 arm64.ABNE & obj.AMask: {Flags: gc.Cjmp}, 121 arm64.ABGE & obj.AMask: {Flags: gc.Cjmp}, 122 arm64.ABLT & obj.AMask: {Flags: gc.Cjmp}, 123 arm64.ABGT & obj.AMask: {Flags: gc.Cjmp}, 124 arm64.ABLE & obj.AMask: {Flags: gc.Cjmp}, 125 arm64.ABLO & obj.AMask: {Flags: gc.Cjmp}, 126 arm64.ABLS & obj.AMask: {Flags: gc.Cjmp}, 127 arm64.ABHI & obj.AMask: {Flags: gc.Cjmp}, 128 arm64.ABHS & obj.AMask: {Flags: gc.Cjmp}, 129 arm64.ACBZ & obj.AMask: {Flags: gc.Cjmp}, 130 arm64.ACBNZ & obj.AMask: {Flags: gc.Cjmp}, 131 obj.ARET: {Flags: gc.Break}, 132 obj.ADUFFZERO: {Flags: gc.Call}, 133 obj.ADUFFCOPY: {Flags: gc.Call}, 134 } 135 136 func proginfo(p *obj.Prog) { 137 info := &p.Info 138 *info = progtable[p.As&obj.AMask] 139 if info.Flags == 0 { 140 gc.Fatalf("proginfo: unknown instruction %v", p) 141 } 142 143 if (info.Flags&gc.RegRead != 0) && p.Reg == 0 { 144 info.Flags &^= gc.RegRead 145 info.Flags |= gc.RightRead /*CanRegRead |*/ 146 } 147 148 if (p.From.Type == obj.TYPE_MEM || p.From.Type == obj.TYPE_ADDR) && p.From.Reg != 0 { 149 info.Regindex |= RtoB(int(p.From.Reg)) 150 if p.Scond != 0 { 151 info.Regset |= RtoB(int(p.From.Reg)) 152 } 153 } 154 155 if (p.To.Type == obj.TYPE_MEM || p.To.Type == obj.TYPE_ADDR) && p.To.Reg != 0 { 156 info.Regindex |= RtoB(int(p.To.Reg)) 157 if p.Scond != 0 { 158 info.Regset |= RtoB(int(p.To.Reg)) 159 } 160 } 161 162 if p.From.Type == obj.TYPE_ADDR && p.From.Sym != nil && (info.Flags&gc.LeftRead != 0) { 163 info.Flags &^= gc.LeftRead 164 info.Flags |= gc.LeftAddr 165 } 166 167 if p.As == obj.ADUFFZERO { 168 info.Reguse |= RtoB(arm64.REGRT1) 169 info.Regset |= RtoB(arm64.REGRT1) 170 } 171 172 if p.As == obj.ADUFFCOPY { 173 // TODO(austin) Revisit when duffcopy is implemented 174 info.Reguse |= RtoB(arm64.REGRT1) | RtoB(arm64.REGRT2) | RtoB(arm64.REG_R5) 175 176 info.Regset |= RtoB(arm64.REGRT1) | RtoB(arm64.REGRT2) 177 } 178 }