github.com/bir3/gocompiler@v0.9.2202/src/cmd/compile/internal/ssa/_gen/386Ops.go (about) 1 // Copyright 2016 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 main 6 7 import "strings" 8 9 // Notes: 10 // - Integer types live in the low portion of registers. Upper portions are junk. 11 // - Boolean types use the low-order byte of a register. 0=false, 1=true. 12 // Upper bytes are junk. 13 // - Floating-point types live in the low natural slot of an sse2 register. 14 // Unused portions are junk. 15 // - We do not use AH,BH,CH,DH registers. 16 // - When doing sub-register operations, we try to write the whole 17 // destination register to avoid a partial-register write. 18 // - Unused portions of AuxInt (or the Val portion of ValAndOff) are 19 // filled by sign-extending the used portion. Users of AuxInt which interpret 20 // AuxInt as unsigned (e.g. shifts) must be careful. 21 22 // Suffixes encode the bit width of various instructions. 23 // L (long word) = 32 bit 24 // W (word) = 16 bit 25 // B (byte) = 8 bit 26 27 // copied from ../../x86/reg.go 28 var regNames386 = []string{ 29 "AX", 30 "CX", 31 "DX", 32 "BX", 33 "SP", 34 "BP", 35 "SI", 36 "DI", 37 "X0", 38 "X1", 39 "X2", 40 "X3", 41 "X4", 42 "X5", 43 "X6", 44 "X7", 45 46 // If you add registers, update asyncPreempt in runtime 47 48 // pseudo-registers 49 "SB", 50 } 51 52 func init() { 53 // Make map from reg names to reg integers. 54 if len(regNames386) > 64 { 55 panic("too many registers") 56 } 57 num := map[string]int{} 58 for i, name := range regNames386 { 59 num[name] = i 60 } 61 buildReg := func(s string) regMask { 62 m := regMask(0) 63 for _, r := range strings.Split(s, " ") { 64 if n, ok := num[r]; ok { 65 m |= regMask(1) << uint(n) 66 continue 67 } 68 panic("register " + r + " not found") 69 } 70 return m 71 } 72 73 // Common individual register masks 74 var ( 75 ax = buildReg("AX") 76 cx = buildReg("CX") 77 dx = buildReg("DX") 78 bx = buildReg("BX") 79 si = buildReg("SI") 80 gp = buildReg("AX CX DX BX BP SI DI") 81 fp = buildReg("X0 X1 X2 X3 X4 X5 X6 X7") 82 gpsp = gp | buildReg("SP") 83 gpspsb = gpsp | buildReg("SB") 84 callerSave = gp | fp 85 ) 86 // Common slices of register masks 87 var ( 88 gponly = []regMask{gp} 89 fponly = []regMask{fp} 90 ) 91 92 // Common regInfo 93 var ( 94 gp01 = regInfo{inputs: nil, outputs: gponly} 95 gp11 = regInfo{inputs: []regMask{gp}, outputs: gponly} 96 gp11sp = regInfo{inputs: []regMask{gpsp}, outputs: gponly} 97 gp11sb = regInfo{inputs: []regMask{gpspsb}, outputs: gponly} 98 gp21 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly} 99 gp11carry = regInfo{inputs: []regMask{gp}, outputs: []regMask{gp, 0}} 100 gp21carry = regInfo{inputs: []regMask{gp, gp}, outputs: []regMask{gp, 0}} 101 gp1carry1 = regInfo{inputs: []regMask{gp}, outputs: gponly} 102 gp2carry1 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly} 103 gp21sp = regInfo{inputs: []regMask{gpsp, gp}, outputs: gponly} 104 gp21sb = regInfo{inputs: []regMask{gpspsb, gpsp}, outputs: gponly} 105 gp21shift = regInfo{inputs: []regMask{gp, cx}, outputs: []regMask{gp}} 106 gp11div = regInfo{inputs: []regMask{ax, gpsp &^ dx}, outputs: []regMask{ax}, clobbers: dx} 107 gp21hmul = regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{dx}, clobbers: ax} 108 gp11mod = regInfo{inputs: []regMask{ax, gpsp &^ dx}, outputs: []regMask{dx}, clobbers: ax} 109 gp21mul = regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{dx, ax}} 110 111 gp2flags = regInfo{inputs: []regMask{gpsp, gpsp}} 112 gp1flags = regInfo{inputs: []regMask{gpsp}} 113 gp0flagsLoad = regInfo{inputs: []regMask{gpspsb, 0}} 114 gp1flagsLoad = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} 115 flagsgp = regInfo{inputs: nil, outputs: gponly} 116 117 readflags = regInfo{inputs: nil, outputs: gponly} 118 flagsgpax = regInfo{inputs: nil, clobbers: ax, outputs: []regMask{gp &^ ax}} 119 120 gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: gponly} 121 gp21load = regInfo{inputs: []regMask{gp, gpspsb, 0}, outputs: gponly} 122 gploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: gponly} 123 gp21loadidx = regInfo{inputs: []regMask{gp, gpspsb, gpsp, 0}, outputs: gponly} 124 125 gpstore = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} 126 gpstoreconst = regInfo{inputs: []regMask{gpspsb, 0}} 127 gpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, gpsp, 0}} 128 gpstoreconstidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} 129 130 fp01 = regInfo{inputs: nil, outputs: fponly} 131 fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly} 132 fp21load = regInfo{inputs: []regMask{fp, gpspsb, 0}, outputs: fponly} 133 fpgp = regInfo{inputs: fponly, outputs: gponly} 134 gpfp = regInfo{inputs: gponly, outputs: fponly} 135 fp11 = regInfo{inputs: fponly, outputs: fponly} 136 fp2flags = regInfo{inputs: []regMask{fp, fp}} 137 138 fpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: fponly} 139 fploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: fponly} 140 141 fpstore = regInfo{inputs: []regMask{gpspsb, fp, 0}} 142 fpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, fp, 0}} 143 ) 144 145 var _386ops = []opData{ 146 // fp ops 147 {name: "ADDSS", argLength: 2, reg: fp21, asm: "ADDSS", commutative: true, resultInArg0: true}, // fp32 add 148 {name: "ADDSD", argLength: 2, reg: fp21, asm: "ADDSD", commutative: true, resultInArg0: true}, // fp64 add 149 {name: "SUBSS", argLength: 2, reg: fp21, asm: "SUBSS", resultInArg0: true}, // fp32 sub 150 {name: "SUBSD", argLength: 2, reg: fp21, asm: "SUBSD", resultInArg0: true}, // fp64 sub 151 {name: "MULSS", argLength: 2, reg: fp21, asm: "MULSS", commutative: true, resultInArg0: true}, // fp32 mul 152 {name: "MULSD", argLength: 2, reg: fp21, asm: "MULSD", commutative: true, resultInArg0: true}, // fp64 mul 153 {name: "DIVSS", argLength: 2, reg: fp21, asm: "DIVSS", resultInArg0: true}, // fp32 div 154 {name: "DIVSD", argLength: 2, reg: fp21, asm: "DIVSD", resultInArg0: true}, // fp64 div 155 156 {name: "MOVSSload", argLength: 2, reg: fpload, asm: "MOVSS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp32 load 157 {name: "MOVSDload", argLength: 2, reg: fpload, asm: "MOVSD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp64 load 158 {name: "MOVSSconst", reg: fp01, asm: "MOVSS", aux: "Float32", rematerializeable: true}, // fp32 constant 159 {name: "MOVSDconst", reg: fp01, asm: "MOVSD", aux: "Float64", rematerializeable: true}, // fp64 constant 160 {name: "MOVSSloadidx1", argLength: 3, reg: fploadidx, asm: "MOVSS", aux: "SymOff", symEffect: "Read"}, // fp32 load indexed by i 161 {name: "MOVSSloadidx4", argLength: 3, reg: fploadidx, asm: "MOVSS", aux: "SymOff", symEffect: "Read"}, // fp32 load indexed by 4*i 162 {name: "MOVSDloadidx1", argLength: 3, reg: fploadidx, asm: "MOVSD", aux: "SymOff", symEffect: "Read"}, // fp64 load indexed by i 163 {name: "MOVSDloadidx8", argLength: 3, reg: fploadidx, asm: "MOVSD", aux: "SymOff", symEffect: "Read"}, // fp64 load indexed by 8*i 164 165 {name: "MOVSSstore", argLength: 3, reg: fpstore, asm: "MOVSS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp32 store 166 {name: "MOVSDstore", argLength: 3, reg: fpstore, asm: "MOVSD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp64 store 167 {name: "MOVSSstoreidx1", argLength: 4, reg: fpstoreidx, asm: "MOVSS", aux: "SymOff", symEffect: "Write"}, // fp32 indexed by i store 168 {name: "MOVSSstoreidx4", argLength: 4, reg: fpstoreidx, asm: "MOVSS", aux: "SymOff", symEffect: "Write"}, // fp32 indexed by 4i store 169 {name: "MOVSDstoreidx1", argLength: 4, reg: fpstoreidx, asm: "MOVSD", aux: "SymOff", symEffect: "Write"}, // fp64 indexed by i store 170 {name: "MOVSDstoreidx8", argLength: 4, reg: fpstoreidx, asm: "MOVSD", aux: "SymOff", symEffect: "Write"}, // fp64 indexed by 8i store 171 172 {name: "ADDSSload", argLength: 3, reg: fp21load, asm: "ADDSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 173 {name: "ADDSDload", argLength: 3, reg: fp21load, asm: "ADDSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 174 {name: "SUBSSload", argLength: 3, reg: fp21load, asm: "SUBSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 175 {name: "SUBSDload", argLength: 3, reg: fp21load, asm: "SUBSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 176 {name: "MULSSload", argLength: 3, reg: fp21load, asm: "MULSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 177 {name: "MULSDload", argLength: 3, reg: fp21load, asm: "MULSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 178 {name: "DIVSSload", argLength: 3, reg: fp21load, asm: "DIVSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 / tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 179 {name: "DIVSDload", argLength: 3, reg: fp21load, asm: "DIVSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 / tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 180 181 // binary ops 182 {name: "ADDL", argLength: 2, reg: gp21sp, asm: "ADDL", commutative: true, clobberFlags: true}, // arg0 + arg1 183 {name: "ADDLconst", argLength: 1, reg: gp11sp, asm: "ADDL", aux: "Int32", typ: "UInt32", clobberFlags: true}, // arg0 + auxint 184 185 {name: "ADDLcarry", argLength: 2, reg: gp21carry, asm: "ADDL", commutative: true, resultInArg0: true}, // arg0 + arg1, generates <carry,result> pair 186 {name: "ADDLconstcarry", argLength: 1, reg: gp11carry, asm: "ADDL", aux: "Int32", resultInArg0: true}, // arg0 + auxint, generates <carry,result> pair 187 {name: "ADCL", argLength: 3, reg: gp2carry1, asm: "ADCL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0+arg1+carry(arg2), where arg2 is flags 188 {name: "ADCLconst", argLength: 2, reg: gp1carry1, asm: "ADCL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0+auxint+carry(arg1), where arg1 is flags 189 190 {name: "SUBL", argLength: 2, reg: gp21, asm: "SUBL", resultInArg0: true, clobberFlags: true}, // arg0 - arg1 191 {name: "SUBLconst", argLength: 1, reg: gp11, asm: "SUBL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 - auxint 192 193 {name: "SUBLcarry", argLength: 2, reg: gp21carry, asm: "SUBL", resultInArg0: true}, // arg0-arg1, generates <borrow,result> pair 194 {name: "SUBLconstcarry", argLength: 1, reg: gp11carry, asm: "SUBL", aux: "Int32", resultInArg0: true}, // arg0-auxint, generates <borrow,result> pair 195 {name: "SBBL", argLength: 3, reg: gp2carry1, asm: "SBBL", resultInArg0: true, clobberFlags: true}, // arg0-arg1-borrow(arg2), where arg2 is flags 196 {name: "SBBLconst", argLength: 2, reg: gp1carry1, asm: "SBBL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0-auxint-borrow(arg1), where arg1 is flags 197 198 {name: "MULL", argLength: 2, reg: gp21, asm: "IMULL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 * arg1 199 {name: "MULLconst", argLength: 1, reg: gp11, asm: "IMUL3L", aux: "Int32", clobberFlags: true}, // arg0 * auxint 200 201 {name: "MULLU", argLength: 2, reg: regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{ax, 0}, clobbers: dx}, typ: "(UInt32,Flags)", asm: "MULL", commutative: true, clobberFlags: true}, // Let x = arg0*arg1 (full 32x32->64 unsigned multiply). Returns uint32(x), and flags set to overflow if uint32(x) != x. 202 203 {name: "HMULL", argLength: 2, reg: gp21hmul, commutative: true, asm: "IMULL", clobberFlags: true}, // (arg0 * arg1) >> width 204 {name: "HMULLU", argLength: 2, reg: gp21hmul, commutative: true, asm: "MULL", clobberFlags: true}, // (arg0 * arg1) >> width 205 206 {name: "MULLQU", argLength: 2, reg: gp21mul, commutative: true, asm: "MULL", clobberFlags: true}, // arg0 * arg1, high 32 in result[0], low 32 in result[1] 207 208 {name: "AVGLU", argLength: 2, reg: gp21, commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 + arg1) / 2 as unsigned, all 32 result bits 209 210 // For DIVL, DIVW, MODL and MODW, AuxInt non-zero means that the divisor has been proved to be not -1. 211 {name: "DIVL", argLength: 2, reg: gp11div, asm: "IDIVL", aux: "Bool", clobberFlags: true}, // arg0 / arg1 212 {name: "DIVW", argLength: 2, reg: gp11div, asm: "IDIVW", aux: "Bool", clobberFlags: true}, // arg0 / arg1 213 {name: "DIVLU", argLength: 2, reg: gp11div, asm: "DIVL", clobberFlags: true}, // arg0 / arg1 214 {name: "DIVWU", argLength: 2, reg: gp11div, asm: "DIVW", clobberFlags: true}, // arg0 / arg1 215 216 {name: "MODL", argLength: 2, reg: gp11mod, asm: "IDIVL", aux: "Bool", clobberFlags: true}, // arg0 % arg1 217 {name: "MODW", argLength: 2, reg: gp11mod, asm: "IDIVW", aux: "Bool", clobberFlags: true}, // arg0 % arg1 218 {name: "MODLU", argLength: 2, reg: gp11mod, asm: "DIVL", clobberFlags: true}, // arg0 % arg1 219 {name: "MODWU", argLength: 2, reg: gp11mod, asm: "DIVW", clobberFlags: true}, // arg0 % arg1 220 221 {name: "ANDL", argLength: 2, reg: gp21, asm: "ANDL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 & arg1 222 {name: "ANDLconst", argLength: 1, reg: gp11, asm: "ANDL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 & auxint 223 224 {name: "ORL", argLength: 2, reg: gp21, asm: "ORL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 | arg1 225 {name: "ORLconst", argLength: 1, reg: gp11, asm: "ORL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 | auxint 226 227 {name: "XORL", argLength: 2, reg: gp21, asm: "XORL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 ^ arg1 228 {name: "XORLconst", argLength: 1, reg: gp11, asm: "XORL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 ^ auxint 229 230 {name: "CMPL", argLength: 2, reg: gp2flags, asm: "CMPL", typ: "Flags"}, // arg0 compare to arg1 231 {name: "CMPW", argLength: 2, reg: gp2flags, asm: "CMPW", typ: "Flags"}, // arg0 compare to arg1 232 {name: "CMPB", argLength: 2, reg: gp2flags, asm: "CMPB", typ: "Flags"}, // arg0 compare to arg1 233 {name: "CMPLconst", argLength: 1, reg: gp1flags, asm: "CMPL", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint 234 {name: "CMPWconst", argLength: 1, reg: gp1flags, asm: "CMPW", typ: "Flags", aux: "Int16"}, // arg0 compare to auxint 235 {name: "CMPBconst", argLength: 1, reg: gp1flags, asm: "CMPB", typ: "Flags", aux: "Int8"}, // arg0 compare to auxint 236 237 // compare *(arg0+auxint+aux) to arg1 (in that order). arg2=mem. 238 {name: "CMPLload", argLength: 3, reg: gp1flagsLoad, asm: "CMPL", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 239 {name: "CMPWload", argLength: 3, reg: gp1flagsLoad, asm: "CMPW", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 240 {name: "CMPBload", argLength: 3, reg: gp1flagsLoad, asm: "CMPB", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 241 242 // compare *(arg0+ValAndOff(AuxInt).Off()+aux) to ValAndOff(AuxInt).Val() (in that order). arg1=mem. 243 {name: "CMPLconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPL", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 244 {name: "CMPWconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPW", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 245 {name: "CMPBconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPB", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, 246 247 {name: "UCOMISS", argLength: 2, reg: fp2flags, asm: "UCOMISS", typ: "Flags"}, // arg0 compare to arg1, f32 248 {name: "UCOMISD", argLength: 2, reg: fp2flags, asm: "UCOMISD", typ: "Flags"}, // arg0 compare to arg1, f64 249 250 {name: "TESTL", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTL", typ: "Flags"}, // (arg0 & arg1) compare to 0 251 {name: "TESTW", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTW", typ: "Flags"}, // (arg0 & arg1) compare to 0 252 {name: "TESTB", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTB", typ: "Flags"}, // (arg0 & arg1) compare to 0 253 {name: "TESTLconst", argLength: 1, reg: gp1flags, asm: "TESTL", typ: "Flags", aux: "Int32"}, // (arg0 & auxint) compare to 0 254 {name: "TESTWconst", argLength: 1, reg: gp1flags, asm: "TESTW", typ: "Flags", aux: "Int16"}, // (arg0 & auxint) compare to 0 255 {name: "TESTBconst", argLength: 1, reg: gp1flags, asm: "TESTB", typ: "Flags", aux: "Int8"}, // (arg0 & auxint) compare to 0 256 257 {name: "SHLL", argLength: 2, reg: gp21shift, asm: "SHLL", resultInArg0: true, clobberFlags: true}, // arg0 << arg1, shift amount is mod 32 258 {name: "SHLLconst", argLength: 1, reg: gp11, asm: "SHLL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 << auxint, shift amount 0-31 259 // Note: x86 is weird, the 16 and 8 byte shifts still use all 5 bits of shift amount! 260 261 {name: "SHRL", argLength: 2, reg: gp21shift, asm: "SHRL", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 262 {name: "SHRW", argLength: 2, reg: gp21shift, asm: "SHRW", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 263 {name: "SHRB", argLength: 2, reg: gp21shift, asm: "SHRB", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 264 {name: "SHRLconst", argLength: 1, reg: gp11, asm: "SHRL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-31 265 {name: "SHRWconst", argLength: 1, reg: gp11, asm: "SHRW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-15 266 {name: "SHRBconst", argLength: 1, reg: gp11, asm: "SHRB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-7 267 268 {name: "SARL", argLength: 2, reg: gp21shift, asm: "SARL", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 269 {name: "SARW", argLength: 2, reg: gp21shift, asm: "SARW", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 270 {name: "SARB", argLength: 2, reg: gp21shift, asm: "SARB", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 271 {name: "SARLconst", argLength: 1, reg: gp11, asm: "SARL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-31 272 {name: "SARWconst", argLength: 1, reg: gp11, asm: "SARW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-15 273 {name: "SARBconst", argLength: 1, reg: gp11, asm: "SARB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-7 274 275 {name: "ROLL", argLength: 2, reg: gp21shift, asm: "ROLL", resultInArg0: true, clobberFlags: true}, // 32 bits of arg0 rotate left by arg1 276 {name: "ROLW", argLength: 2, reg: gp21shift, asm: "ROLW", resultInArg0: true, clobberFlags: true}, // low 16 bits of arg0 rotate left by arg1 277 {name: "ROLB", argLength: 2, reg: gp21shift, asm: "ROLB", resultInArg0: true, clobberFlags: true}, // low 8 bits of arg0 rotate left by arg1 278 {name: "ROLLconst", argLength: 1, reg: gp11, asm: "ROLL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-31 279 {name: "ROLWconst", argLength: 1, reg: gp11, asm: "ROLW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-15 280 {name: "ROLBconst", argLength: 1, reg: gp11, asm: "ROLB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-7 281 282 // binary-op with a memory source operand 283 {name: "ADDLload", argLength: 3, reg: gp21load, asm: "ADDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 284 {name: "SUBLload", argLength: 3, reg: gp21load, asm: "SUBL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 285 {name: "MULLload", argLength: 3, reg: gp21load, asm: "IMULL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 286 {name: "ANDLload", argLength: 3, reg: gp21load, asm: "ANDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 & tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 287 {name: "ORLload", argLength: 3, reg: gp21load, asm: "ORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 288 {name: "XORLload", argLength: 3, reg: gp21load, asm: "XORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ tmp, tmp loaded from arg1+auxint+aux, arg2 = mem 289 290 // binary-op with an indexed memory source operand 291 {name: "ADDLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ADDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 + tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 292 {name: "SUBLloadidx4", argLength: 4, reg: gp21loadidx, asm: "SUBL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 - tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 293 {name: "MULLloadidx4", argLength: 4, reg: gp21loadidx, asm: "IMULL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 * tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 294 {name: "ANDLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ANDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 & tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 295 {name: "ORLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 | tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 296 {name: "XORLloadidx4", argLength: 4, reg: gp21loadidx, asm: "XORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, symEffect: "Read"}, // arg0 ^ tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem 297 298 // unary ops 299 {name: "NEGL", argLength: 1, reg: gp11, asm: "NEGL", resultInArg0: true, clobberFlags: true}, // -arg0 300 301 {name: "NOTL", argLength: 1, reg: gp11, asm: "NOTL", resultInArg0: true}, // ^arg0 302 303 {name: "BSFL", argLength: 1, reg: gp11, asm: "BSFL", clobberFlags: true}, // arg0 # of low-order zeroes ; undef if zero 304 {name: "BSFW", argLength: 1, reg: gp11, asm: "BSFW", clobberFlags: true}, // arg0 # of low-order zeroes ; undef if zero 305 {name: "LoweredCtz32", argLength: 1, reg: gp11, clobberFlags: true}, // arg0 # of low-order zeroes 306 307 {name: "BSRL", argLength: 1, reg: gp11, asm: "BSRL", clobberFlags: true}, // arg0 # of high-order zeroes ; undef if zero 308 {name: "BSRW", argLength: 1, reg: gp11, asm: "BSRW", clobberFlags: true}, // arg0 # of high-order zeroes ; undef if zero 309 310 {name: "BSWAPL", argLength: 1, reg: gp11, asm: "BSWAPL", resultInArg0: true}, // arg0 swap bytes 311 312 {name: "SQRTSD", argLength: 1, reg: fp11, asm: "SQRTSD"}, // sqrt(arg0) 313 {name: "SQRTSS", argLength: 1, reg: fp11, asm: "SQRTSS"}, // sqrt(arg0), float32 314 315 {name: "SBBLcarrymask", argLength: 1, reg: flagsgp, asm: "SBBL"}, // (int32)(-1) if carry is set, 0 if carry is clear. 316 // Note: SBBW and SBBB are subsumed by SBBL 317 318 {name: "SETEQ", argLength: 1, reg: readflags, asm: "SETEQ"}, // extract == condition from arg0 319 {name: "SETNE", argLength: 1, reg: readflags, asm: "SETNE"}, // extract != condition from arg0 320 {name: "SETL", argLength: 1, reg: readflags, asm: "SETLT"}, // extract signed < condition from arg0 321 {name: "SETLE", argLength: 1, reg: readflags, asm: "SETLE"}, // extract signed <= condition from arg0 322 {name: "SETG", argLength: 1, reg: readflags, asm: "SETGT"}, // extract signed > condition from arg0 323 {name: "SETGE", argLength: 1, reg: readflags, asm: "SETGE"}, // extract signed >= condition from arg0 324 {name: "SETB", argLength: 1, reg: readflags, asm: "SETCS"}, // extract unsigned < condition from arg0 325 {name: "SETBE", argLength: 1, reg: readflags, asm: "SETLS"}, // extract unsigned <= condition from arg0 326 {name: "SETA", argLength: 1, reg: readflags, asm: "SETHI"}, // extract unsigned > condition from arg0 327 {name: "SETAE", argLength: 1, reg: readflags, asm: "SETCC"}, // extract unsigned >= condition from arg0 328 {name: "SETO", argLength: 1, reg: readflags, asm: "SETOS"}, // extract if overflow flag is set from arg0 329 // Need different opcodes for floating point conditions because 330 // any comparison involving a NaN is always FALSE and thus 331 // the patterns for inverting conditions cannot be used. 332 {name: "SETEQF", argLength: 1, reg: flagsgpax, asm: "SETEQ", clobberFlags: true}, // extract == condition from arg0 333 {name: "SETNEF", argLength: 1, reg: flagsgpax, asm: "SETNE", clobberFlags: true}, // extract != condition from arg0 334 {name: "SETORD", argLength: 1, reg: flagsgp, asm: "SETPC"}, // extract "ordered" (No Nan present) condition from arg0 335 {name: "SETNAN", argLength: 1, reg: flagsgp, asm: "SETPS"}, // extract "unordered" (Nan present) condition from arg0 336 337 {name: "SETGF", argLength: 1, reg: flagsgp, asm: "SETHI"}, // extract floating > condition from arg0 338 {name: "SETGEF", argLength: 1, reg: flagsgp, asm: "SETCC"}, // extract floating >= condition from arg0 339 340 {name: "MOVBLSX", argLength: 1, reg: gp11, asm: "MOVBLSX"}, // sign extend arg0 from int8 to int32 341 {name: "MOVBLZX", argLength: 1, reg: gp11, asm: "MOVBLZX"}, // zero extend arg0 from int8 to int32 342 {name: "MOVWLSX", argLength: 1, reg: gp11, asm: "MOVWLSX"}, // sign extend arg0 from int16 to int32 343 {name: "MOVWLZX", argLength: 1, reg: gp11, asm: "MOVWLZX"}, // zero extend arg0 from int16 to int32 344 345 {name: "MOVLconst", reg: gp01, asm: "MOVL", typ: "UInt32", aux: "Int32", rematerializeable: true}, // 32 low bits of auxint 346 347 {name: "CVTTSD2SL", argLength: 1, reg: fpgp, asm: "CVTTSD2SL"}, // convert float64 to int32 348 {name: "CVTTSS2SL", argLength: 1, reg: fpgp, asm: "CVTTSS2SL"}, // convert float32 to int32 349 {name: "CVTSL2SS", argLength: 1, reg: gpfp, asm: "CVTSL2SS"}, // convert int32 to float32 350 {name: "CVTSL2SD", argLength: 1, reg: gpfp, asm: "CVTSL2SD"}, // convert int32 to float64 351 {name: "CVTSD2SS", argLength: 1, reg: fp11, asm: "CVTSD2SS"}, // convert float64 to float32 352 {name: "CVTSS2SD", argLength: 1, reg: fp11, asm: "CVTSS2SD"}, // convert float32 to float64 353 354 {name: "PXOR", argLength: 2, reg: fp21, asm: "PXOR", commutative: true, resultInArg0: true}, // exclusive or, applied to X regs for float negation. 355 356 {name: "LEAL", argLength: 1, reg: gp11sb, aux: "SymOff", rematerializeable: true, symEffect: "Addr"}, // arg0 + auxint + offset encoded in aux 357 {name: "LEAL1", argLength: 2, reg: gp21sb, commutative: true, aux: "SymOff", symEffect: "Addr"}, // arg0 + arg1 + auxint + aux 358 {name: "LEAL2", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 2*arg1 + auxint + aux 359 {name: "LEAL4", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 4*arg1 + auxint + aux 360 {name: "LEAL8", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 8*arg1 + auxint + aux 361 // Note: LEAL{1,2,4,8} must not have OpSB as either argument. 362 363 // auxint+aux == add auxint and the offset of the symbol in aux (if any) to the effective address 364 {name: "MOVBload", argLength: 2, reg: gpload, asm: "MOVBLZX", aux: "SymOff", typ: "UInt8", faultOnNilArg0: true, symEffect: "Read"}, // load byte from arg0+auxint+aux. arg1=mem. Zero extend. 365 {name: "MOVBLSXload", argLength: 2, reg: gpload, asm: "MOVBLSX", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int32 366 {name: "MOVWload", argLength: 2, reg: gpload, asm: "MOVWLZX", aux: "SymOff", typ: "UInt16", faultOnNilArg0: true, symEffect: "Read"}, // load 2 bytes from arg0+auxint+aux. arg1=mem. Zero extend. 367 {name: "MOVWLSXload", argLength: 2, reg: gpload, asm: "MOVWLSX", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int32 368 {name: "MOVLload", argLength: 2, reg: gpload, asm: "MOVL", aux: "SymOff", typ: "UInt32", faultOnNilArg0: true, symEffect: "Read"}, // load 4 bytes from arg0+auxint+aux. arg1=mem. Zero extend. 369 {name: "MOVBstore", argLength: 3, reg: gpstore, asm: "MOVB", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store byte in arg1 to arg0+auxint+aux. arg2=mem 370 {name: "MOVWstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes in arg1 to arg0+auxint+aux. arg2=mem 371 {name: "MOVLstore", argLength: 3, reg: gpstore, asm: "MOVL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes in arg1 to arg0+auxint+aux. arg2=mem 372 373 // direct binary-op on memory (read-modify-write) 374 {name: "ADDLmodify", argLength: 3, reg: gpstore, asm: "ADDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) += arg1, arg2=mem 375 {name: "SUBLmodify", argLength: 3, reg: gpstore, asm: "SUBL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) -= arg1, arg2=mem 376 {name: "ANDLmodify", argLength: 3, reg: gpstore, asm: "ANDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) &= arg1, arg2=mem 377 {name: "ORLmodify", argLength: 3, reg: gpstore, asm: "ORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) |= arg1, arg2=mem 378 {name: "XORLmodify", argLength: 3, reg: gpstore, asm: "XORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) ^= arg1, arg2=mem 379 380 // direct binary-op on indexed memory (read-modify-write) 381 {name: "ADDLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ADDL", aux: "SymOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) += arg2, arg3=mem 382 {name: "SUBLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "SUBL", aux: "SymOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) -= arg2, arg3=mem 383 {name: "ANDLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ANDL", aux: "SymOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) &= arg2, arg3=mem 384 {name: "ORLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ORL", aux: "SymOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) |= arg2, arg3=mem 385 {name: "XORLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "XORL", aux: "SymOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) ^= arg2, arg3=mem 386 387 // direct binary-op on memory with a constant (read-modify-write) 388 {name: "ADDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ADDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // add ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem 389 {name: "ANDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ANDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // and ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem 390 {name: "ORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // or ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem 391 {name: "XORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "XORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // xor ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem 392 393 // direct binary-op on indexed memory with a constant (read-modify-write) 394 {name: "ADDLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ADDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // add ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem 395 {name: "ANDLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ANDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // and ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem 396 {name: "ORLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // or ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem 397 {name: "XORLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "XORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, symEffect: "Read,Write"}, // xor ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem 398 399 // indexed loads/stores 400 {name: "MOVBloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVBLZX", aux: "SymOff", symEffect: "Read"}, // load a byte from arg0+arg1+auxint+aux. arg2=mem 401 {name: "MOVWloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVWLZX", aux: "SymOff", symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem 402 {name: "MOVWloadidx2", argLength: 3, reg: gploadidx, asm: "MOVWLZX", aux: "SymOff", symEffect: "Read"}, // load 2 bytes from arg0+2*arg1+auxint+aux. arg2=mem 403 {name: "MOVLloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVL", aux: "SymOff", symEffect: "Read"}, // load 4 bytes from arg0+arg1+auxint+aux. arg2=mem 404 {name: "MOVLloadidx4", argLength: 3, reg: gploadidx, asm: "MOVL", aux: "SymOff", symEffect: "Read"}, // load 4 bytes from arg0+4*arg1+auxint+aux. arg2=mem 405 // TODO: sign-extending indexed loads 406 {name: "MOVBstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVB", aux: "SymOff", symEffect: "Write"}, // store byte in arg2 to arg0+arg1+auxint+aux. arg3=mem 407 {name: "MOVWstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVW", aux: "SymOff", symEffect: "Write"}, // store 2 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem 408 {name: "MOVWstoreidx2", argLength: 4, reg: gpstoreidx, asm: "MOVW", aux: "SymOff", symEffect: "Write"}, // store 2 bytes in arg2 to arg0+2*arg1+auxint+aux. arg3=mem 409 {name: "MOVLstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVL", aux: "SymOff", symEffect: "Write"}, // store 4 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem 410 {name: "MOVLstoreidx4", argLength: 4, reg: gpstoreidx, asm: "MOVL", aux: "SymOff", symEffect: "Write"}, // store 4 bytes in arg2 to arg0+4*arg1+auxint+aux. arg3=mem 411 // TODO: add size-mismatched indexed loads, like MOVBstoreidx4. 412 413 // For storeconst ops, the AuxInt field encodes both 414 // the value to store and an address offset of the store. 415 // Cast AuxInt to a ValAndOff to extract Val and Off fields. 416 {name: "MOVBstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVB", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low byte of ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux. arg1=mem 417 {name: "MOVWstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 2 bytes of ... 418 {name: "MOVLstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 4 bytes of ... 419 420 {name: "MOVBstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVB", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low byte of ValAndOff(AuxInt).Val() to arg0+1*arg1+ValAndOff(AuxInt).Off()+aux. arg2=mem 421 {name: "MOVWstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 2 bytes of ... arg1 ... 422 {name: "MOVWstoreconstidx2", argLength: 3, reg: gpstoreconstidx, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 2 bytes of ... 2*arg1 ... 423 {name: "MOVLstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 4 bytes of ... arg1 ... 424 {name: "MOVLstoreconstidx4", argLength: 3, reg: gpstoreconstidx, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 4 bytes of ... 4*arg1 ... 425 426 // arg0 = pointer to start of memory to zero 427 // arg1 = value to store (will always be zero) 428 // arg2 = mem 429 // auxint = offset into duffzero code to start executing 430 // returns mem 431 { 432 name: "DUFFZERO", 433 aux: "Int64", 434 argLength: 3, 435 reg: regInfo{ 436 inputs: []regMask{buildReg("DI"), buildReg("AX")}, 437 clobbers: buildReg("DI CX"), 438 // Note: CX is only clobbered when dynamic linking. 439 }, 440 faultOnNilArg0: true, 441 }, 442 443 // arg0 = address of memory to zero 444 // arg1 = # of 4-byte words to zero 445 // arg2 = value to store (will always be zero) 446 // arg3 = mem 447 // returns mem 448 { 449 name: "REPSTOSL", 450 argLength: 4, 451 reg: regInfo{ 452 inputs: []regMask{buildReg("DI"), buildReg("CX"), buildReg("AX")}, 453 clobbers: buildReg("DI CX"), 454 }, 455 faultOnNilArg0: true, 456 }, 457 458 {name: "CALLstatic", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem 459 {name: "CALLtail", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true, tailCall: true}, // tail call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem 460 {name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("DX"), 0}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem 461 {name: "CALLinter", argLength: 2, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem 462 463 // arg0 = destination pointer 464 // arg1 = source pointer 465 // arg2 = mem 466 // auxint = offset from duffcopy symbol to call 467 // returns memory 468 { 469 name: "DUFFCOPY", 470 aux: "Int64", 471 argLength: 3, 472 reg: regInfo{ 473 inputs: []regMask{buildReg("DI"), buildReg("SI")}, 474 clobbers: buildReg("DI SI CX"), // uses CX as a temporary 475 }, 476 clobberFlags: true, 477 faultOnNilArg0: true, 478 faultOnNilArg1: true, 479 }, 480 481 // arg0 = destination pointer 482 // arg1 = source pointer 483 // arg2 = # of 8-byte words to copy 484 // arg3 = mem 485 // returns memory 486 { 487 name: "REPMOVSL", 488 argLength: 4, 489 reg: regInfo{ 490 inputs: []regMask{buildReg("DI"), buildReg("SI"), buildReg("CX")}, 491 clobbers: buildReg("DI SI CX"), 492 }, 493 faultOnNilArg0: true, 494 faultOnNilArg1: true, 495 }, 496 497 // (InvertFlags (CMPL a b)) == (CMPL b a) 498 // So if we want (SETL (CMPL a b)) but we can't do that because a is a constant, 499 // then we do (SETL (InvertFlags (CMPL b a))) instead. 500 // Rewrites will convert this to (SETG (CMPL b a)). 501 // InvertFlags is a pseudo-op which can't appear in assembly output. 502 {name: "InvertFlags", argLength: 1}, // reverse direction of arg0 503 504 // Pseudo-ops 505 {name: "LoweredGetG", argLength: 1, reg: gp01}, // arg0=mem 506 // Scheduler ensures LoweredGetClosurePtr occurs only in entry block, 507 // and sorts it to the very beginning of the block to prevent other 508 // use of DX (the closure pointer) 509 {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("DX")}}, zeroWidth: true}, 510 // LoweredGetCallerPC evaluates to the PC to which its "caller" will return. 511 // I.e., if f calls g "calls" getcallerpc, 512 // the result should be the PC within f that g will return to. 513 // See runtime/stubs.go for a more detailed discussion. 514 {name: "LoweredGetCallerPC", reg: gp01, rematerializeable: true}, 515 // LoweredGetCallerSP returns the SP of the caller of the current function. arg0=mem 516 {name: "LoweredGetCallerSP", argLength: 1, reg: gp01, rematerializeable: true}, 517 //arg0=ptr,arg1=mem, returns void. Faults if ptr is nil. 518 {name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{gpsp}}, clobberFlags: true, nilCheck: true, faultOnNilArg0: true}, 519 520 // LoweredWB invokes runtime.gcWriteBarrier. arg0=mem, auxint=# of write barrier slots 521 // It saves all GP registers if necessary, but may clobber others. 522 // Returns a pointer to a write barrier buffer in DI. 523 {name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: callerSave &^ gp, outputs: []regMask{buildReg("DI")}}, clobberFlags: true, aux: "Int64"}, 524 525 // There are three of these functions so that they can have three different register inputs. 526 // When we check 0 <= c <= cap (A), then 0 <= b <= c (B), then 0 <= a <= b (C), we want the 527 // default registers to match so we don't need to copy registers around unnecessarily. 528 {name: "LoweredPanicBoundsA", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{dx, bx}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). 529 {name: "LoweredPanicBoundsB", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{cx, dx}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). 530 {name: "LoweredPanicBoundsC", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{ax, cx}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). 531 // Extend ops are the same as Bounds ops except the indexes are 64-bit. 532 {name: "LoweredPanicExtendA", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{si, dx, bx}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). 533 {name: "LoweredPanicExtendB", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{si, cx, dx}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). 534 {name: "LoweredPanicExtendC", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{si, ax, cx}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). 535 536 // Constant flag values. For any comparison, there are 5 possible 537 // outcomes: the three from the signed total order (<,==,>) and the 538 // three from the unsigned total order. The == cases overlap. 539 // Note: there's a sixth "unordered" outcome for floating-point 540 // comparisons, but we don't use such a beast yet. 541 // These ops are for temporary use by rewrite rules. They 542 // cannot appear in the generated assembly. 543 {name: "FlagEQ"}, // equal 544 {name: "FlagLT_ULT"}, // signed < and unsigned < 545 {name: "FlagLT_UGT"}, // signed < and unsigned > 546 {name: "FlagGT_UGT"}, // signed > and unsigned < 547 {name: "FlagGT_ULT"}, // signed > and unsigned > 548 549 // Special ops for PIC floating-point constants. 550 // MOVSXconst1 loads the address of the constant-pool entry into a register. 551 // MOVSXconst2 loads the constant from that address. 552 // MOVSXconst1 returns a pointer, but we type it as uint32 because it can never point to the Go heap. 553 {name: "MOVSSconst1", reg: gp01, typ: "UInt32", aux: "Float32"}, 554 {name: "MOVSDconst1", reg: gp01, typ: "UInt32", aux: "Float64"}, 555 {name: "MOVSSconst2", argLength: 1, reg: gpfp, asm: "MOVSS"}, 556 {name: "MOVSDconst2", argLength: 1, reg: gpfp, asm: "MOVSD"}, 557 } 558 559 var _386blocks = []blockData{ 560 {name: "EQ", controls: 1}, 561 {name: "NE", controls: 1}, 562 {name: "LT", controls: 1}, 563 {name: "LE", controls: 1}, 564 {name: "GT", controls: 1}, 565 {name: "GE", controls: 1}, 566 {name: "OS", controls: 1}, 567 {name: "OC", controls: 1}, 568 {name: "ULT", controls: 1}, 569 {name: "ULE", controls: 1}, 570 {name: "UGT", controls: 1}, 571 {name: "UGE", controls: 1}, 572 {name: "EQF", controls: 1}, 573 {name: "NEF", controls: 1}, 574 {name: "ORD", controls: 1}, // FP, ordered comparison (parity zero) 575 {name: "NAN", controls: 1}, // FP, unordered comparison (parity one) 576 } 577 578 archs = append(archs, arch{ 579 name: "386", 580 pkg: "cmd/internal/obj/x86", 581 genfile: "../../x86/ssa.go", 582 ops: _386ops, 583 blocks: _386blocks, 584 regnames: regNames386, 585 gpregmask: gp, 586 fpregmask: fp, 587 framepointerreg: int8(num["BP"]), 588 linkreg: -1, // not used 589 }) 590 }