github.com/euank/go@v0.0.0-20160829210321-495514729181/src/cmd/compile/internal/mips64/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 mips64 6 7 import ( 8 "cmd/compile/internal/gc" 9 "cmd/internal/obj" 10 "cmd/internal/obj/mips" 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 = [mips.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 MIPS opcode. 41 obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite}, 42 43 // Integer 44 mips.AADD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 45 mips.AADDU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 46 mips.AADDV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 47 mips.AADDVU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 48 mips.ASUB & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 49 mips.ASUBU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 50 mips.ASUBV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 51 mips.ASUBVU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 52 mips.AAND & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 53 mips.AOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 54 mips.AXOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 55 mips.ANOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 56 mips.AMUL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 57 mips.AMULU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 58 mips.AMULV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 59 mips.AMULVU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 60 mips.ADIV & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 61 mips.ADIVU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 62 mips.ADIVV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 63 mips.ADIVVU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 64 mips.AREM & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 65 mips.AREMU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, 66 mips.AREMV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 67 mips.AREMVU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead}, 68 mips.ASLL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 69 mips.ASLLV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 70 mips.ASRA & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 71 mips.ASRAV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 72 mips.ASRL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, 73 mips.ASRLV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 74 mips.ASGT & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 75 mips.ASGTU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite}, 76 77 // Floating point. 78 mips.AADDF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 79 mips.AADDD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 80 mips.ASUBF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 81 mips.ASUBD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 82 mips.AMULF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 83 mips.AMULD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 84 mips.ADIVF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, 85 mips.ADIVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, 86 mips.AABSF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, 87 mips.AABSD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, 88 mips.ANEGF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, 89 mips.ANEGD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, 90 mips.ACMPEQF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, 91 mips.ACMPEQD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, 92 mips.ACMPGTF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, 93 mips.ACMPGTD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, 94 mips.ACMPGEF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, 95 mips.ACMPGED & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, 96 mips.AMOVFD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 97 mips.AMOVDF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 98 mips.AMOVFW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 99 mips.AMOVWF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 100 mips.AMOVDW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 101 mips.AMOVWD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 102 mips.AMOVFV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 103 mips.AMOVVF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 104 mips.AMOVDV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 105 mips.AMOVVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 106 mips.ATRUNCFW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 107 mips.ATRUNCDW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 108 mips.ATRUNCFV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 109 mips.ATRUNCDV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Conv}, 110 111 // Moves 112 mips.AMOVB & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 113 mips.AMOVBU & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 114 mips.AMOVH & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 115 mips.AMOVHU & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 116 mips.AMOVW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 117 mips.AMOVWU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 118 mips.AMOVV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move}, 119 mips.AMOVF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, 120 mips.AMOVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move}, 121 122 // Jumps 123 mips.AJMP & obj.AMask: {Flags: gc.Jump | gc.Break}, 124 mips.AJAL & obj.AMask: {Flags: gc.Call}, 125 mips.ABEQ & obj.AMask: {Flags: gc.Cjmp}, 126 mips.ABNE & obj.AMask: {Flags: gc.Cjmp}, 127 mips.ABGEZ & obj.AMask: {Flags: gc.Cjmp}, 128 mips.ABLTZ & obj.AMask: {Flags: gc.Cjmp}, 129 mips.ABGTZ & obj.AMask: {Flags: gc.Cjmp}, 130 mips.ABLEZ & obj.AMask: {Flags: gc.Cjmp}, 131 mips.ABFPF & obj.AMask: {Flags: gc.Cjmp}, 132 mips.ABFPT & obj.AMask: {Flags: gc.Cjmp}, 133 mips.ARET & obj.AMask: {Flags: gc.Break}, 134 obj.ADUFFZERO: {Flags: gc.Call}, 135 obj.ADUFFCOPY: {Flags: gc.Call}, 136 } 137 138 func proginfo(p *obj.Prog) { 139 info := &p.Info 140 *info = progtable[p.As&obj.AMask] 141 if info.Flags == 0 { 142 gc.Fatalf("proginfo: unknown instruction %v", p) 143 } 144 145 if (info.Flags&gc.RegRead != 0) && p.Reg == 0 { 146 info.Flags &^= gc.RegRead 147 info.Flags |= gc.RightRead /*CanRegRead |*/ 148 } 149 150 if (p.From.Type == obj.TYPE_MEM || p.From.Type == obj.TYPE_ADDR) && p.From.Reg != 0 { 151 info.Regindex |= RtoB(int(p.From.Reg)) 152 } 153 154 if (p.To.Type == obj.TYPE_MEM || p.To.Type == obj.TYPE_ADDR) && p.To.Reg != 0 { 155 info.Regindex |= RtoB(int(p.To.Reg)) 156 } 157 158 if p.From.Type == obj.TYPE_ADDR && p.From.Sym != nil && (info.Flags&gc.LeftRead != 0) { 159 info.Flags &^= gc.LeftRead 160 info.Flags |= gc.LeftAddr 161 } 162 163 if p.As == obj.ADUFFZERO { 164 info.Reguse |= 1<<0 | RtoB(mips.REGRT1) 165 info.Regset |= RtoB(mips.REGRT1) 166 } 167 168 if p.As == obj.ADUFFCOPY { 169 // TODO(austin) Revisit when duffcopy is implemented 170 info.Reguse |= RtoB(mips.REGRT1) | RtoB(mips.REGRT2) | RtoB(mips.REG_R3) 171 172 info.Regset |= RtoB(mips.REGRT1) | RtoB(mips.REGRT2) 173 } 174 }