github.com/q45/go@v0.0.0-20151101211701-a4fb8c13db3f/src/cmd/compile/internal/x86/prog.go (about) 1 // Copyright 2013 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 x86 6 7 import ( 8 "cmd/compile/internal/gc" 9 "cmd/internal/obj" 10 "cmd/internal/obj/x86" 11 ) 12 13 var ( 14 AX = RtoB(x86.REG_AX) 15 BX = RtoB(x86.REG_BX) 16 CX = RtoB(x86.REG_CX) 17 DX = RtoB(x86.REG_DX) 18 DI = RtoB(x86.REG_DI) 19 SI = RtoB(x86.REG_SI) 20 LeftRdwr uint32 = gc.LeftRead | gc.LeftWrite 21 RightRdwr uint32 = gc.RightRead | gc.RightWrite 22 ) 23 24 // This table gives the basic information about instruction 25 // generated by the compiler and processed in the optimizer. 26 // See opt.h for bit definitions. 27 // 28 // Instructions not generated need not be listed. 29 // As an exception to that rule, we typically write down all the 30 // size variants of an operation even if we just use a subset. 31 // 32 // The table is formatted for 8-space tabs. 33 var progtable = [x86.ALAST]obj.ProgInfo{ 34 obj.ATYPE: {Flags: gc.Pseudo | gc.Skip}, 35 obj.ATEXT: {Flags: gc.Pseudo}, 36 obj.AFUNCDATA: {Flags: gc.Pseudo}, 37 obj.APCDATA: {Flags: gc.Pseudo}, 38 obj.AUNDEF: {Flags: gc.Break}, 39 obj.AUSEFIELD: {Flags: gc.OK}, 40 obj.ACHECKNIL: {Flags: gc.LeftRead}, 41 obj.AVARDEF: {Flags: gc.Pseudo | gc.RightWrite}, 42 obj.AVARKILL: {Flags: gc.Pseudo | gc.RightWrite}, 43 44 // NOP is an internal no-op that also stands 45 // for USED and SET annotations, not the Intel opcode. 46 obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite}, 47 x86.AADCL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry}, 48 x86.AADCW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry}, 49 x86.AADDB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry}, 50 x86.AADDL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry}, 51 x86.AADDW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry}, 52 x86.AADDSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr}, 53 x86.AADDSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr}, 54 x86.AANDB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry}, 55 x86.AANDL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry}, 56 x86.AANDW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry}, 57 obj.ACALL: {Flags: gc.RightAddr | gc.Call | gc.KillCarry}, 58 x86.ACDQ: {Flags: gc.OK, Reguse: AX, Regset: AX | DX}, 59 x86.ACWD: {Flags: gc.OK, Reguse: AX, Regset: AX | DX}, 60 x86.ACLD: {Flags: gc.OK}, 61 x86.ASTD: {Flags: gc.OK}, 62 x86.ACMPB: {Flags: gc.SizeB | gc.LeftRead | gc.RightRead | gc.SetCarry}, 63 x86.ACMPL: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead | gc.SetCarry}, 64 x86.ACMPW: {Flags: gc.SizeW | gc.LeftRead | gc.RightRead | gc.SetCarry}, 65 x86.ACOMISD: {Flags: gc.SizeD | gc.LeftRead | gc.RightRead | gc.SetCarry}, 66 x86.ACOMISS: {Flags: gc.SizeF | gc.LeftRead | gc.RightRead | gc.SetCarry}, 67 x86.ACVTSD2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 68 x86.ACVTSD2SS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 69 x86.ACVTSL2SD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 70 x86.ACVTSL2SS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, 71 x86.ACVTSS2SD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, 72 x86.ACVTSS2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 73 x86.ACVTTSD2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 74 x86.ACVTTSS2SL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 75 x86.ADECB: {Flags: gc.SizeB | RightRdwr}, 76 x86.ADECL: {Flags: gc.SizeL | RightRdwr}, 77 x86.ADECW: {Flags: gc.SizeW | RightRdwr}, 78 x86.ADIVB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX}, 79 x86.ADIVL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX}, 80 x86.ADIVW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX}, 81 x86.ADIVSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr}, 82 x86.ADIVSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr}, 83 x86.AFLDCW: {Flags: gc.SizeW | gc.LeftAddr}, 84 x86.AFSTCW: {Flags: gc.SizeW | gc.RightAddr}, 85 x86.AFSTSW: {Flags: gc.SizeW | gc.RightAddr | gc.RightWrite}, 86 x86.AFADDD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 87 x86.AFADDDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 88 x86.AFADDF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 89 x86.AFCOMD: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead}, 90 x86.AFCOMDP: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead}, 91 x86.AFCOMDPP: {Flags: gc.SizeD | gc.LeftAddr | gc.RightRead}, 92 x86.AFCOMF: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead}, 93 x86.AFCOMFP: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead}, 94 x86.AFUCOMIP: {Flags: gc.SizeF | gc.LeftAddr | gc.RightRead}, 95 x86.AFCHS: {Flags: gc.SizeD | RightRdwr}, // also SizeF 96 97 x86.AFDIVDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 98 x86.AFDIVF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 99 x86.AFDIVD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 100 x86.AFDIVRDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 101 x86.AFDIVRF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 102 x86.AFDIVRD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 103 x86.AFXCHD: {Flags: gc.SizeD | LeftRdwr | RightRdwr}, 104 x86.AFSUBD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 105 x86.AFSUBDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 106 x86.AFSUBF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 107 x86.AFSUBRD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 108 x86.AFSUBRDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 109 x86.AFSUBRF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 110 x86.AFMOVD: {Flags: gc.SizeD | gc.LeftAddr | gc.RightWrite}, 111 x86.AFMOVF: {Flags: gc.SizeF | gc.LeftAddr | gc.RightWrite}, 112 x86.AFMOVL: {Flags: gc.SizeL | gc.LeftAddr | gc.RightWrite}, 113 x86.AFMOVW: {Flags: gc.SizeW | gc.LeftAddr | gc.RightWrite}, 114 x86.AFMOVV: {Flags: gc.SizeQ | gc.LeftAddr | gc.RightWrite}, 115 116 // These instructions are marked as RightAddr 117 // so that the register optimizer does not try to replace the 118 // memory references with integer register references. 119 // But they do not use the previous value at the address, so 120 // we also mark them RightWrite. 121 x86.AFMOVDP: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.RightAddr}, 122 x86.AFMOVFP: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.RightAddr}, 123 x86.AFMOVLP: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.RightAddr}, 124 x86.AFMOVWP: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.RightAddr}, 125 x86.AFMOVVP: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.RightAddr}, 126 x86.AFMULD: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 127 x86.AFMULDP: {Flags: gc.SizeD | gc.LeftAddr | RightRdwr}, 128 x86.AFMULF: {Flags: gc.SizeF | gc.LeftAddr | RightRdwr}, 129 x86.AIDIVB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX}, 130 x86.AIDIVL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX}, 131 x86.AIDIVW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX | DX, Regset: AX | DX}, 132 x86.AIMULB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX}, 133 x86.AIMULL: {Flags: gc.SizeL | gc.LeftRead | gc.ImulAXDX | gc.SetCarry}, 134 x86.AIMULW: {Flags: gc.SizeW | gc.LeftRead | gc.ImulAXDX | gc.SetCarry}, 135 x86.AINCB: {Flags: gc.SizeB | RightRdwr}, 136 x86.AINCL: {Flags: gc.SizeL | RightRdwr}, 137 x86.AINCW: {Flags: gc.SizeW | RightRdwr}, 138 x86.AJCC: {Flags: gc.Cjmp | gc.UseCarry}, 139 x86.AJCS: {Flags: gc.Cjmp | gc.UseCarry}, 140 x86.AJEQ: {Flags: gc.Cjmp | gc.UseCarry}, 141 x86.AJGE: {Flags: gc.Cjmp | gc.UseCarry}, 142 x86.AJGT: {Flags: gc.Cjmp | gc.UseCarry}, 143 x86.AJHI: {Flags: gc.Cjmp | gc.UseCarry}, 144 x86.AJLE: {Flags: gc.Cjmp | gc.UseCarry}, 145 x86.AJLS: {Flags: gc.Cjmp | gc.UseCarry}, 146 x86.AJLT: {Flags: gc.Cjmp | gc.UseCarry}, 147 x86.AJMI: {Flags: gc.Cjmp | gc.UseCarry}, 148 x86.AJNE: {Flags: gc.Cjmp | gc.UseCarry}, 149 x86.AJOC: {Flags: gc.Cjmp | gc.UseCarry}, 150 x86.AJOS: {Flags: gc.Cjmp | gc.UseCarry}, 151 x86.AJPC: {Flags: gc.Cjmp | gc.UseCarry}, 152 x86.AJPL: {Flags: gc.Cjmp | gc.UseCarry}, 153 x86.AJPS: {Flags: gc.Cjmp | gc.UseCarry}, 154 obj.AJMP: {Flags: gc.Jump | gc.Break | gc.KillCarry}, 155 x86.ALEAL: {Flags: gc.LeftAddr | gc.RightWrite}, 156 x86.AMOVBLSX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 157 x86.AMOVBLZX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 158 x86.AMOVBWSX: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Conv}, 159 x86.AMOVBWZX: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Conv}, 160 x86.AMOVWLSX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 161 x86.AMOVWLZX: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, 162 x86.AMOVB: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move}, 163 x86.AMOVL: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move}, 164 x86.AMOVW: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move}, 165 x86.AMOVSB: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI}, 166 x86.AMOVSL: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI}, 167 x86.AMOVSW: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI}, 168 obj.ADUFFCOPY: {Flags: gc.OK, Reguse: DI | SI, Regset: DI | SI | CX}, 169 x86.AMOVSD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move}, 170 x86.AMOVSS: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move}, 171 172 // We use MOVAPD as a faster synonym for MOVSD. 173 x86.AMOVAPD: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move}, 174 x86.AMULB: {Flags: gc.SizeB | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX}, 175 x86.AMULL: {Flags: gc.SizeL | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX | DX}, 176 x86.AMULW: {Flags: gc.SizeW | gc.LeftRead | gc.SetCarry, Reguse: AX, Regset: AX | DX}, 177 x86.AMULSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr}, 178 x86.AMULSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr}, 179 x86.ANEGB: {Flags: gc.SizeB | RightRdwr | gc.SetCarry}, 180 x86.ANEGL: {Flags: gc.SizeL | RightRdwr | gc.SetCarry}, 181 x86.ANEGW: {Flags: gc.SizeW | RightRdwr | gc.SetCarry}, 182 x86.ANOTB: {Flags: gc.SizeB | RightRdwr}, 183 x86.ANOTL: {Flags: gc.SizeL | RightRdwr}, 184 x86.ANOTW: {Flags: gc.SizeW | RightRdwr}, 185 x86.AORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry}, 186 x86.AORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry}, 187 x86.AORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry}, 188 x86.APOPL: {Flags: gc.SizeL | gc.RightWrite}, 189 x86.APUSHL: {Flags: gc.SizeL | gc.LeftRead}, 190 x86.ARCLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 191 x86.ARCLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 192 x86.ARCLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 193 x86.ARCRB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 194 x86.ARCRL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 195 x86.ARCRW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry | gc.UseCarry}, 196 x86.AREP: {Flags: gc.OK, Reguse: CX, Regset: CX}, 197 x86.AREPN: {Flags: gc.OK, Reguse: CX, Regset: CX}, 198 obj.ARET: {Flags: gc.Break | gc.KillCarry}, 199 x86.AROLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 200 x86.AROLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 201 x86.AROLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 202 x86.ARORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 203 x86.ARORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 204 x86.ARORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 205 x86.ASAHF: {Flags: gc.OK, Reguse: AX, Regset: AX}, 206 x86.ASALB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 207 x86.ASALL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 208 x86.ASALW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 209 x86.ASARB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 210 x86.ASARL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 211 x86.ASARW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 212 x86.ASBBB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry}, 213 x86.ASBBL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry}, 214 x86.ASBBW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry | gc.UseCarry}, 215 x86.ASETCC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 216 x86.ASETCS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 217 x86.ASETEQ: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 218 x86.ASETGE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 219 x86.ASETGT: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 220 x86.ASETHI: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 221 x86.ASETLE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 222 x86.ASETLS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 223 x86.ASETLT: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 224 x86.ASETMI: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 225 x86.ASETNE: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 226 x86.ASETOC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 227 x86.ASETOS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 228 x86.ASETPC: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 229 x86.ASETPL: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 230 x86.ASETPS: {Flags: gc.SizeB | RightRdwr | gc.UseCarry}, 231 x86.ASHLB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 232 x86.ASHLL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 233 x86.ASHLW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 234 x86.ASHRB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 235 x86.ASHRL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 236 x86.ASHRW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.ShiftCX | gc.SetCarry}, 237 x86.ASTOSB: {Flags: gc.OK, Reguse: AX | DI, Regset: DI}, 238 x86.ASTOSL: {Flags: gc.OK, Reguse: AX | DI, Regset: DI}, 239 x86.ASTOSW: {Flags: gc.OK, Reguse: AX | DI, Regset: DI}, 240 obj.ADUFFZERO: {Flags: gc.OK, Reguse: AX | DI, Regset: DI}, 241 x86.ASUBB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry}, 242 x86.ASUBL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry}, 243 x86.ASUBW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry}, 244 x86.ASUBSD: {Flags: gc.SizeD | gc.LeftRead | RightRdwr}, 245 x86.ASUBSS: {Flags: gc.SizeF | gc.LeftRead | RightRdwr}, 246 x86.ATESTB: {Flags: gc.SizeB | gc.LeftRead | gc.RightRead | gc.SetCarry}, 247 x86.ATESTL: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead | gc.SetCarry}, 248 x86.ATESTW: {Flags: gc.SizeW | gc.LeftRead | gc.RightRead | gc.SetCarry}, 249 x86.AUCOMISD: {Flags: gc.SizeD | gc.LeftRead | gc.RightRead}, 250 x86.AUCOMISS: {Flags: gc.SizeF | gc.LeftRead | gc.RightRead}, 251 x86.AXCHGB: {Flags: gc.SizeB | LeftRdwr | RightRdwr}, 252 x86.AXCHGL: {Flags: gc.SizeL | LeftRdwr | RightRdwr}, 253 x86.AXCHGW: {Flags: gc.SizeW | LeftRdwr | RightRdwr}, 254 x86.AXORB: {Flags: gc.SizeB | gc.LeftRead | RightRdwr | gc.SetCarry}, 255 x86.AXORL: {Flags: gc.SizeL | gc.LeftRead | RightRdwr | gc.SetCarry}, 256 x86.AXORW: {Flags: gc.SizeW | gc.LeftRead | RightRdwr | gc.SetCarry}, 257 } 258 259 func proginfo(p *obj.Prog) { 260 info := &p.Info 261 *info = progtable[p.As] 262 if info.Flags == 0 { 263 gc.Fatalf("unknown instruction %v", p) 264 } 265 266 if (info.Flags&gc.ShiftCX != 0) && p.From.Type != obj.TYPE_CONST { 267 info.Reguse |= CX 268 } 269 270 if info.Flags&gc.ImulAXDX != 0 { 271 if p.To.Type == obj.TYPE_NONE { 272 info.Reguse |= AX 273 info.Regset |= AX | DX 274 } else { 275 info.Flags |= RightRdwr 276 } 277 } 278 279 // Addressing makes some registers used. 280 if p.From.Type == obj.TYPE_MEM && p.From.Name == obj.NAME_NONE { 281 info.Regindex |= RtoB(int(p.From.Reg)) 282 } 283 if p.From.Index != x86.REG_NONE { 284 info.Regindex |= RtoB(int(p.From.Index)) 285 } 286 if p.To.Type == obj.TYPE_MEM && p.To.Name == obj.NAME_NONE { 287 info.Regindex |= RtoB(int(p.To.Reg)) 288 } 289 if p.To.Index != x86.REG_NONE { 290 info.Regindex |= RtoB(int(p.To.Index)) 291 } 292 }