github.com/euank/go@v0.0.0-20160829210321-495514729181/src/cmd/compile/internal/ssa/gen/ARMOps.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 // +build ignore 6 7 package main 8 9 import "strings" 10 11 // Notes: 12 // - Integer types live in the low portion of registers. Upper portions are junk. 13 // - Boolean types use the low-order byte of a register. 0=false, 1=true. 14 // Upper bytes are junk. 15 // - *const instructions may use a constant larger than the instuction can encode. 16 // In this case the assembler expands to multiple instructions and uses tmp 17 // register (R11). 18 19 // Suffixes encode the bit width of various instructions. 20 // W (word) = 32 bit 21 // H (half word) = 16 bit 22 // HU = 16 bit unsigned 23 // B (byte) = 8 bit 24 // BU = 8 bit unsigned 25 // F (float) = 32 bit float 26 // D (double) = 64 bit float 27 28 var regNamesARM = []string{ 29 "R0", 30 "R1", 31 "R2", 32 "R3", 33 "R4", 34 "R5", 35 "R6", 36 "R7", 37 "R8", 38 "R9", 39 "g", // aka R10 40 "R11", // tmp 41 "R12", 42 "SP", // aka R13 43 "R14", // link 44 "R15", // pc 45 46 "F0", 47 "F1", 48 "F2", 49 "F3", 50 "F4", 51 "F5", 52 "F6", 53 "F7", 54 "F8", 55 "F9", 56 "F10", 57 "F11", 58 "F12", 59 "F13", 60 "F14", 61 "F15", // tmp 62 63 // pseudo-registers 64 "SB", 65 } 66 67 func init() { 68 // Make map from reg names to reg integers. 69 if len(regNamesARM) > 64 { 70 panic("too many registers") 71 } 72 num := map[string]int{} 73 for i, name := range regNamesARM { 74 num[name] = i 75 } 76 buildReg := func(s string) regMask { 77 m := regMask(0) 78 for _, r := range strings.Split(s, " ") { 79 if n, ok := num[r]; ok { 80 m |= regMask(1) << uint(n) 81 continue 82 } 83 panic("register " + r + " not found") 84 } 85 return m 86 } 87 88 // Common individual register masks 89 var ( 90 gp = buildReg("R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12") 91 gpg = gp | buildReg("g") 92 gpsp = gp | buildReg("SP") 93 gpspg = gpg | buildReg("SP") 94 gpspsbg = gpspg | buildReg("SB") 95 fp = buildReg("F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15") 96 callerSave = gp | fp | buildReg("g") // runtime.setg (and anything calling it) may clobber g 97 ) 98 // Common regInfo 99 var ( 100 gp01 = regInfo{inputs: nil, outputs: []regMask{gp}} 101 gp11 = regInfo{inputs: []regMask{gpg}, outputs: []regMask{gp}} 102 gp11carry = regInfo{inputs: []regMask{gpg}, outputs: []regMask{gp, 0}} 103 gp11sp = regInfo{inputs: []regMask{gpspg}, outputs: []regMask{gp}} 104 gp1flags = regInfo{inputs: []regMask{gpg}} 105 gp1flags1 = regInfo{inputs: []regMask{gp}, outputs: []regMask{gp}} 106 gp21 = regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{gp}} 107 gp21carry = regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{gp, 0}} 108 gp2flags = regInfo{inputs: []regMask{gpg, gpg}} 109 gp2flags1 = regInfo{inputs: []regMask{gp, gp}, outputs: []regMask{gp}} 110 gp22 = regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{gp, gp}} 111 gp31 = regInfo{inputs: []regMask{gp, gp, gp}, outputs: []regMask{gp}} 112 gp31carry = regInfo{inputs: []regMask{gp, gp, gp}, outputs: []regMask{gp, 0}} 113 gp3flags = regInfo{inputs: []regMask{gp, gp, gp}} 114 gp3flags1 = regInfo{inputs: []regMask{gp, gp, gp}, outputs: []regMask{gp}} 115 gpload = regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{gp}} 116 gpstore = regInfo{inputs: []regMask{gpspsbg, gpg}} 117 gp2load = regInfo{inputs: []regMask{gpspsbg, gpg}, outputs: []regMask{gp}} 118 gp2store = regInfo{inputs: []regMask{gpspsbg, gpg, gpg}} 119 fp01 = regInfo{inputs: nil, outputs: []regMask{fp}} 120 fp11 = regInfo{inputs: []regMask{fp}, outputs: []regMask{fp}} 121 fp1flags = regInfo{inputs: []regMask{fp}} 122 fpgp = regInfo{inputs: []regMask{fp}, outputs: []regMask{gp}} 123 gpfp = regInfo{inputs: []regMask{gp}, outputs: []regMask{fp}} 124 fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: []regMask{fp}} 125 fp2flags = regInfo{inputs: []regMask{fp, fp}} 126 fpload = regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{fp}} 127 fpstore = regInfo{inputs: []regMask{gpspsbg, fp}} 128 readflags = regInfo{inputs: nil, outputs: []regMask{gp}} 129 ) 130 ops := []opData{ 131 // binary ops 132 {name: "ADD", argLength: 2, reg: gp21, asm: "ADD", commutative: true}, // arg0 + arg1 133 {name: "ADDconst", argLength: 1, reg: gp11sp, asm: "ADD", aux: "Int32"}, // arg0 + auxInt 134 {name: "SUB", argLength: 2, reg: gp21, asm: "SUB"}, // arg0 - arg1 135 {name: "SUBconst", argLength: 1, reg: gp11, asm: "SUB", aux: "Int32"}, // arg0 - auxInt 136 {name: "RSB", argLength: 2, reg: gp21, asm: "RSB"}, // arg1 - arg0 137 {name: "RSBconst", argLength: 1, reg: gp11, asm: "RSB", aux: "Int32"}, // auxInt - arg0 138 {name: "MUL", argLength: 2, reg: gp21, asm: "MUL", commutative: true}, // arg0 * arg1 139 {name: "HMUL", argLength: 2, reg: gp21, asm: "MULL", commutative: true}, // (arg0 * arg1) >> 32, signed 140 {name: "HMULU", argLength: 2, reg: gp21, asm: "MULLU", commutative: true}, // (arg0 * arg1) >> 32, unsigned 141 {name: "DIV", argLength: 2, reg: gp21, asm: "DIV", clobberFlags: true}, // arg0 / arg1, signed, soft div clobbers flags 142 {name: "DIVU", argLength: 2, reg: gp21, asm: "DIVU", clobberFlags: true}, // arg0 / arg1, unsighed 143 {name: "MOD", argLength: 2, reg: gp21, asm: "MOD", clobberFlags: true}, // arg0 % arg1, signed 144 {name: "MODU", argLength: 2, reg: gp21, asm: "MODU", clobberFlags: true}, // arg0 % arg1, unsigned 145 146 {name: "ADDS", argLength: 2, reg: gp21carry, asm: "ADD", commutative: true}, // arg0 + arg1, set carry flag 147 {name: "ADDSconst", argLength: 1, reg: gp11carry, asm: "ADD", aux: "Int32"}, // arg0 + auxInt, set carry flag 148 {name: "ADC", argLength: 3, reg: gp2flags1, asm: "ADC", commutative: true}, // arg0 + arg1 + carry, arg2=flags 149 {name: "ADCconst", argLength: 2, reg: gp1flags1, asm: "ADC", aux: "Int32"}, // arg0 + auxInt + carry, arg1=flags 150 {name: "SUBS", argLength: 2, reg: gp21carry, asm: "SUB"}, // arg0 - arg1, set carry flag 151 {name: "SUBSconst", argLength: 1, reg: gp11carry, asm: "SUB", aux: "Int32"}, // arg0 - auxInt, set carry flag 152 {name: "RSBSconst", argLength: 1, reg: gp11carry, asm: "RSB", aux: "Int32"}, // auxInt - arg0, set carry flag 153 {name: "SBC", argLength: 3, reg: gp2flags1, asm: "SBC"}, // arg0 - arg1 - carry, arg2=flags 154 {name: "SBCconst", argLength: 2, reg: gp1flags1, asm: "SBC", aux: "Int32"}, // arg0 - auxInt - carry, arg1=flags 155 {name: "RSCconst", argLength: 2, reg: gp1flags1, asm: "RSC", aux: "Int32"}, // auxInt - arg0 - carry, arg1=flags 156 157 {name: "MULLU", argLength: 2, reg: gp22, asm: "MULLU", commutative: true}, // arg0 * arg1, high 32 bits in out0, low 32 bits in out1 158 {name: "MULA", argLength: 3, reg: gp31, asm: "MULA"}, // arg0 * arg1 + arg2 159 160 {name: "ADDF", argLength: 2, reg: fp21, asm: "ADDF", commutative: true}, // arg0 + arg1 161 {name: "ADDD", argLength: 2, reg: fp21, asm: "ADDD", commutative: true}, // arg0 + arg1 162 {name: "SUBF", argLength: 2, reg: fp21, asm: "SUBF"}, // arg0 - arg1 163 {name: "SUBD", argLength: 2, reg: fp21, asm: "SUBD"}, // arg0 - arg1 164 {name: "MULF", argLength: 2, reg: fp21, asm: "MULF", commutative: true}, // arg0 * arg1 165 {name: "MULD", argLength: 2, reg: fp21, asm: "MULD", commutative: true}, // arg0 * arg1 166 {name: "DIVF", argLength: 2, reg: fp21, asm: "DIVF"}, // arg0 / arg1 167 {name: "DIVD", argLength: 2, reg: fp21, asm: "DIVD"}, // arg0 / arg1 168 169 {name: "AND", argLength: 2, reg: gp21, asm: "AND", commutative: true}, // arg0 & arg1 170 {name: "ANDconst", argLength: 1, reg: gp11, asm: "AND", aux: "Int32"}, // arg0 & auxInt 171 {name: "OR", argLength: 2, reg: gp21, asm: "ORR", commutative: true}, // arg0 | arg1 172 {name: "ORconst", argLength: 1, reg: gp11, asm: "ORR", aux: "Int32"}, // arg0 | auxInt 173 {name: "XOR", argLength: 2, reg: gp21, asm: "EOR", commutative: true}, // arg0 ^ arg1 174 {name: "XORconst", argLength: 1, reg: gp11, asm: "EOR", aux: "Int32"}, // arg0 ^ auxInt 175 {name: "BIC", argLength: 2, reg: gp21, asm: "BIC"}, // arg0 &^ arg1 176 {name: "BICconst", argLength: 1, reg: gp11, asm: "BIC", aux: "Int32"}, // arg0 &^ auxInt 177 178 // unary ops 179 {name: "MVN", argLength: 1, reg: gp11, asm: "MVN"}, // ^arg0 180 181 {name: "NEGF", argLength: 1, reg: fp11, asm: "NEGF"}, // -arg0, float32 182 {name: "NEGD", argLength: 1, reg: fp11, asm: "NEGD"}, // -arg0, float64 183 {name: "SQRTD", argLength: 1, reg: fp11, asm: "SQRTD"}, // sqrt(arg0), float64 184 185 // shifts 186 {name: "SLL", argLength: 2, reg: gp21, asm: "SLL"}, // arg0 << arg1, shift amount is mod 256 187 {name: "SLLconst", argLength: 1, reg: gp11, asm: "SLL", aux: "Int32"}, // arg0 << auxInt 188 {name: "SRL", argLength: 2, reg: gp21, asm: "SRL"}, // arg0 >> arg1, unsigned, shift amount is mod 256 189 {name: "SRLconst", argLength: 1, reg: gp11, asm: "SRL", aux: "Int32"}, // arg0 >> auxInt, unsigned 190 {name: "SRA", argLength: 2, reg: gp21, asm: "SRA"}, // arg0 >> arg1, signed, shift amount is mod 256 191 {name: "SRAconst", argLength: 1, reg: gp11, asm: "SRA", aux: "Int32"}, // arg0 >> auxInt, signed 192 {name: "SRRconst", argLength: 1, reg: gp11, aux: "Int32"}, // arg0 right rotate by auxInt bits 193 194 {name: "ADDshiftLL", argLength: 2, reg: gp21, asm: "ADD", aux: "Int32"}, // arg0 + arg1<<auxInt 195 {name: "ADDshiftRL", argLength: 2, reg: gp21, asm: "ADD", aux: "Int32"}, // arg0 + arg1>>auxInt, unsigned shift 196 {name: "ADDshiftRA", argLength: 2, reg: gp21, asm: "ADD", aux: "Int32"}, // arg0 + arg1>>auxInt, signed shift 197 {name: "SUBshiftLL", argLength: 2, reg: gp21, asm: "SUB", aux: "Int32"}, // arg0 - arg1<<auxInt 198 {name: "SUBshiftRL", argLength: 2, reg: gp21, asm: "SUB", aux: "Int32"}, // arg0 - arg1>>auxInt, unsigned shift 199 {name: "SUBshiftRA", argLength: 2, reg: gp21, asm: "SUB", aux: "Int32"}, // arg0 - arg1>>auxInt, signed shift 200 {name: "RSBshiftLL", argLength: 2, reg: gp21, asm: "RSB", aux: "Int32"}, // arg1<<auxInt - arg0 201 {name: "RSBshiftRL", argLength: 2, reg: gp21, asm: "RSB", aux: "Int32"}, // arg1>>auxInt - arg0, unsigned shift 202 {name: "RSBshiftRA", argLength: 2, reg: gp21, asm: "RSB", aux: "Int32"}, // arg1>>auxInt - arg0, signed shift 203 {name: "ANDshiftLL", argLength: 2, reg: gp21, asm: "AND", aux: "Int32"}, // arg0 & (arg1<<auxInt) 204 {name: "ANDshiftRL", argLength: 2, reg: gp21, asm: "AND", aux: "Int32"}, // arg0 & (arg1>>auxInt), unsigned shift 205 {name: "ANDshiftRA", argLength: 2, reg: gp21, asm: "AND", aux: "Int32"}, // arg0 & (arg1>>auxInt), signed shift 206 {name: "ORshiftLL", argLength: 2, reg: gp21, asm: "ORR", aux: "Int32"}, // arg0 | arg1<<auxInt 207 {name: "ORshiftRL", argLength: 2, reg: gp21, asm: "ORR", aux: "Int32"}, // arg0 | arg1>>auxInt, unsigned shift 208 {name: "ORshiftRA", argLength: 2, reg: gp21, asm: "ORR", aux: "Int32"}, // arg0 | arg1>>auxInt, signed shift 209 {name: "XORshiftLL", argLength: 2, reg: gp21, asm: "EOR", aux: "Int32"}, // arg0 ^ arg1<<auxInt 210 {name: "XORshiftRL", argLength: 2, reg: gp21, asm: "EOR", aux: "Int32"}, // arg0 ^ arg1>>auxInt, unsigned shift 211 {name: "XORshiftRA", argLength: 2, reg: gp21, asm: "EOR", aux: "Int32"}, // arg0 ^ arg1>>auxInt, signed shift 212 {name: "BICshiftLL", argLength: 2, reg: gp21, asm: "BIC", aux: "Int32"}, // arg0 &^ (arg1<<auxInt) 213 {name: "BICshiftRL", argLength: 2, reg: gp21, asm: "BIC", aux: "Int32"}, // arg0 &^ (arg1>>auxInt), unsigned shift 214 {name: "BICshiftRA", argLength: 2, reg: gp21, asm: "BIC", aux: "Int32"}, // arg0 &^ (arg1>>auxInt), signed shift 215 {name: "MVNshiftLL", argLength: 1, reg: gp11, asm: "MVN", aux: "Int32"}, // ^(arg0<<auxInt) 216 {name: "MVNshiftRL", argLength: 1, reg: gp11, asm: "MVN", aux: "Int32"}, // ^(arg0>>auxInt), unsigned shift 217 {name: "MVNshiftRA", argLength: 1, reg: gp11, asm: "MVN", aux: "Int32"}, // ^(arg0>>auxInt), signed shift 218 219 {name: "ADCshiftLL", argLength: 3, reg: gp2flags1, asm: "ADC", aux: "Int32"}, // arg0 + arg1<<auxInt + carry, arg2=flags 220 {name: "ADCshiftRL", argLength: 3, reg: gp2flags1, asm: "ADC", aux: "Int32"}, // arg0 + arg1>>auxInt + carry, unsigned shift, arg2=flags 221 {name: "ADCshiftRA", argLength: 3, reg: gp2flags1, asm: "ADC", aux: "Int32"}, // arg0 + arg1>>auxInt + carry, signed shift, arg2=flags 222 {name: "SBCshiftLL", argLength: 3, reg: gp2flags1, asm: "SBC", aux: "Int32"}, // arg0 - arg1<<auxInt - carry, arg2=flags 223 {name: "SBCshiftRL", argLength: 3, reg: gp2flags1, asm: "SBC", aux: "Int32"}, // arg0 - arg1>>auxInt - carry, unsigned shift, arg2=flags 224 {name: "SBCshiftRA", argLength: 3, reg: gp2flags1, asm: "SBC", aux: "Int32"}, // arg0 - arg1>>auxInt - carry, signed shift, arg2=flags 225 {name: "RSCshiftLL", argLength: 3, reg: gp2flags1, asm: "RSC", aux: "Int32"}, // arg1<<auxInt - arg0 - carry, arg2=flags 226 {name: "RSCshiftRL", argLength: 3, reg: gp2flags1, asm: "RSC", aux: "Int32"}, // arg1>>auxInt - arg0 - carry, unsigned shift, arg2=flags 227 {name: "RSCshiftRA", argLength: 3, reg: gp2flags1, asm: "RSC", aux: "Int32"}, // arg1>>auxInt - arg0 - carry, signed shift, arg2=flags 228 229 {name: "ADDSshiftLL", argLength: 2, reg: gp21carry, asm: "ADD", aux: "Int32"}, // arg0 + arg1<<auxInt, set carry flag 230 {name: "ADDSshiftRL", argLength: 2, reg: gp21carry, asm: "ADD", aux: "Int32"}, // arg0 + arg1>>auxInt, unsigned shift, set carry flag 231 {name: "ADDSshiftRA", argLength: 2, reg: gp21carry, asm: "ADD", aux: "Int32"}, // arg0 + arg1>>auxInt, signed shift, set carry flag 232 {name: "SUBSshiftLL", argLength: 2, reg: gp21carry, asm: "SUB", aux: "Int32"}, // arg0 - arg1<<auxInt, set carry flag 233 {name: "SUBSshiftRL", argLength: 2, reg: gp21carry, asm: "SUB", aux: "Int32"}, // arg0 - arg1>>auxInt, unsigned shift, set carry flag 234 {name: "SUBSshiftRA", argLength: 2, reg: gp21carry, asm: "SUB", aux: "Int32"}, // arg0 - arg1>>auxInt, signed shift, set carry flag 235 {name: "RSBSshiftLL", argLength: 2, reg: gp21carry, asm: "RSB", aux: "Int32"}, // arg1<<auxInt - arg0, set carry flag 236 {name: "RSBSshiftRL", argLength: 2, reg: gp21carry, asm: "RSB", aux: "Int32"}, // arg1>>auxInt - arg0, unsigned shift, set carry flag 237 {name: "RSBSshiftRA", argLength: 2, reg: gp21carry, asm: "RSB", aux: "Int32"}, // arg1>>auxInt - arg0, signed shift, set carry flag 238 239 {name: "ADDshiftLLreg", argLength: 3, reg: gp31, asm: "ADD"}, // arg0 + arg1<<arg2 240 {name: "ADDshiftRLreg", argLength: 3, reg: gp31, asm: "ADD"}, // arg0 + arg1>>arg2, unsigned shift 241 {name: "ADDshiftRAreg", argLength: 3, reg: gp31, asm: "ADD"}, // arg0 + arg1>>arg2, signed shift 242 {name: "SUBshiftLLreg", argLength: 3, reg: gp31, asm: "SUB"}, // arg0 - arg1<<arg2 243 {name: "SUBshiftRLreg", argLength: 3, reg: gp31, asm: "SUB"}, // arg0 - arg1>>arg2, unsigned shift 244 {name: "SUBshiftRAreg", argLength: 3, reg: gp31, asm: "SUB"}, // arg0 - arg1>>arg2, signed shift 245 {name: "RSBshiftLLreg", argLength: 3, reg: gp31, asm: "RSB"}, // arg1<<arg2 - arg0 246 {name: "RSBshiftRLreg", argLength: 3, reg: gp31, asm: "RSB"}, // arg1>>arg2 - arg0, unsigned shift 247 {name: "RSBshiftRAreg", argLength: 3, reg: gp31, asm: "RSB"}, // arg1>>arg2 - arg0, signed shift 248 {name: "ANDshiftLLreg", argLength: 3, reg: gp31, asm: "AND"}, // arg0 & (arg1<<arg2) 249 {name: "ANDshiftRLreg", argLength: 3, reg: gp31, asm: "AND"}, // arg0 & (arg1>>arg2), unsigned shift 250 {name: "ANDshiftRAreg", argLength: 3, reg: gp31, asm: "AND"}, // arg0 & (arg1>>arg2), signed shift 251 {name: "ORshiftLLreg", argLength: 3, reg: gp31, asm: "ORR"}, // arg0 | arg1<<arg2 252 {name: "ORshiftRLreg", argLength: 3, reg: gp31, asm: "ORR"}, // arg0 | arg1>>arg2, unsigned shift 253 {name: "ORshiftRAreg", argLength: 3, reg: gp31, asm: "ORR"}, // arg0 | arg1>>arg2, signed shift 254 {name: "XORshiftLLreg", argLength: 3, reg: gp31, asm: "EOR"}, // arg0 ^ arg1<<arg2 255 {name: "XORshiftRLreg", argLength: 3, reg: gp31, asm: "EOR"}, // arg0 ^ arg1>>arg2, unsigned shift 256 {name: "XORshiftRAreg", argLength: 3, reg: gp31, asm: "EOR"}, // arg0 ^ arg1>>arg2, signed shift 257 {name: "BICshiftLLreg", argLength: 3, reg: gp31, asm: "BIC"}, // arg0 &^ (arg1<<arg2) 258 {name: "BICshiftRLreg", argLength: 3, reg: gp31, asm: "BIC"}, // arg0 &^ (arg1>>arg2), unsigned shift 259 {name: "BICshiftRAreg", argLength: 3, reg: gp31, asm: "BIC"}, // arg0 &^ (arg1>>arg2), signed shift 260 {name: "MVNshiftLLreg", argLength: 2, reg: gp21, asm: "MVN"}, // ^(arg0<<arg1) 261 {name: "MVNshiftRLreg", argLength: 2, reg: gp21, asm: "MVN"}, // ^(arg0>>arg1), unsigned shift 262 {name: "MVNshiftRAreg", argLength: 2, reg: gp21, asm: "MVN"}, // ^(arg0>>arg1), signed shift 263 264 {name: "ADCshiftLLreg", argLength: 4, reg: gp3flags1, asm: "ADC"}, // arg0 + arg1<<arg2 + carry, arg3=flags 265 {name: "ADCshiftRLreg", argLength: 4, reg: gp3flags1, asm: "ADC"}, // arg0 + arg1>>arg2 + carry, unsigned shift, arg3=flags 266 {name: "ADCshiftRAreg", argLength: 4, reg: gp3flags1, asm: "ADC"}, // arg0 + arg1>>arg2 + carry, signed shift, arg3=flags 267 {name: "SBCshiftLLreg", argLength: 4, reg: gp3flags1, asm: "SBC"}, // arg0 - arg1<<arg2 - carry, arg3=flags 268 {name: "SBCshiftRLreg", argLength: 4, reg: gp3flags1, asm: "SBC"}, // arg0 - arg1>>arg2 - carry, unsigned shift, arg3=flags 269 {name: "SBCshiftRAreg", argLength: 4, reg: gp3flags1, asm: "SBC"}, // arg0 - arg1>>arg2 - carry, signed shift, arg3=flags 270 {name: "RSCshiftLLreg", argLength: 4, reg: gp3flags1, asm: "RSC"}, // arg1<<arg2 - arg0 - carry, arg3=flags 271 {name: "RSCshiftRLreg", argLength: 4, reg: gp3flags1, asm: "RSC"}, // arg1>>arg2 - arg0 - carry, unsigned shift, arg3=flags 272 {name: "RSCshiftRAreg", argLength: 4, reg: gp3flags1, asm: "RSC"}, // arg1>>arg2 - arg0 - carry, signed shift, arg3=flags 273 274 {name: "ADDSshiftLLreg", argLength: 3, reg: gp31carry, asm: "ADD"}, // arg0 + arg1<<arg2, set carry flag 275 {name: "ADDSshiftRLreg", argLength: 3, reg: gp31carry, asm: "ADD"}, // arg0 + arg1>>arg2, unsigned shift, set carry flag 276 {name: "ADDSshiftRAreg", argLength: 3, reg: gp31carry, asm: "ADD"}, // arg0 + arg1>>arg2, signed shift, set carry flag 277 {name: "SUBSshiftLLreg", argLength: 3, reg: gp31carry, asm: "SUB"}, // arg0 - arg1<<arg2, set carry flag 278 {name: "SUBSshiftRLreg", argLength: 3, reg: gp31carry, asm: "SUB"}, // arg0 - arg1>>arg2, unsigned shift, set carry flag 279 {name: "SUBSshiftRAreg", argLength: 3, reg: gp31carry, asm: "SUB"}, // arg0 - arg1>>arg2, signed shift, set carry flag 280 {name: "RSBSshiftLLreg", argLength: 3, reg: gp31carry, asm: "RSB"}, // arg1<<arg2 - arg0, set carry flag 281 {name: "RSBSshiftRLreg", argLength: 3, reg: gp31carry, asm: "RSB"}, // arg1>>arg2 - arg0, unsigned shift, set carry flag 282 {name: "RSBSshiftRAreg", argLength: 3, reg: gp31carry, asm: "RSB"}, // arg1>>arg2 - arg0, signed shift, set carry flag 283 284 // comparisons 285 {name: "CMP", argLength: 2, reg: gp2flags, asm: "CMP", typ: "Flags"}, // arg0 compare to arg1 286 {name: "CMPconst", argLength: 1, reg: gp1flags, asm: "CMP", aux: "Int32", typ: "Flags"}, // arg0 compare to auxInt 287 {name: "CMN", argLength: 2, reg: gp2flags, asm: "CMN", typ: "Flags"}, // arg0 compare to -arg1 288 {name: "CMNconst", argLength: 1, reg: gp1flags, asm: "CMN", aux: "Int32", typ: "Flags"}, // arg0 compare to -auxInt 289 {name: "TST", argLength: 2, reg: gp2flags, asm: "TST", typ: "Flags", commutative: true}, // arg0 & arg1 compare to 0 290 {name: "TSTconst", argLength: 1, reg: gp1flags, asm: "TST", aux: "Int32", typ: "Flags"}, // arg0 & auxInt compare to 0 291 {name: "TEQ", argLength: 2, reg: gp2flags, asm: "TEQ", typ: "Flags", commutative: true}, // arg0 ^ arg1 compare to 0 292 {name: "TEQconst", argLength: 1, reg: gp1flags, asm: "TEQ", aux: "Int32", typ: "Flags"}, // arg0 ^ auxInt compare to 0 293 {name: "CMPF", argLength: 2, reg: fp2flags, asm: "CMPF", typ: "Flags"}, // arg0 compare to arg1, float32 294 {name: "CMPD", argLength: 2, reg: fp2flags, asm: "CMPD", typ: "Flags"}, // arg0 compare to arg1, float64 295 296 {name: "CMPshiftLL", argLength: 2, reg: gp2flags, asm: "CMP", aux: "Int32", typ: "Flags"}, // arg0 compare to arg1<<auxInt 297 {name: "CMPshiftRL", argLength: 2, reg: gp2flags, asm: "CMP", aux: "Int32", typ: "Flags"}, // arg0 compare to arg1>>auxInt, unsigned shift 298 {name: "CMPshiftRA", argLength: 2, reg: gp2flags, asm: "CMP", aux: "Int32", typ: "Flags"}, // arg0 compare to arg1>>auxInt, signed shift 299 300 {name: "CMPshiftLLreg", argLength: 3, reg: gp3flags, asm: "CMP", typ: "Flags"}, // arg0 compare to arg1<<arg2 301 {name: "CMPshiftRLreg", argLength: 3, reg: gp3flags, asm: "CMP", typ: "Flags"}, // arg0 compare to arg1>>arg2, unsigned shift 302 {name: "CMPshiftRAreg", argLength: 3, reg: gp3flags, asm: "CMP", typ: "Flags"}, // arg0 compare to arg1>>arg2, signed shift 303 304 {name: "CMPF0", argLength: 1, reg: fp1flags, asm: "CMPF", typ: "Flags"}, // arg0 compare to 0, float32 305 {name: "CMPD0", argLength: 1, reg: fp1flags, asm: "CMPD", typ: "Flags"}, // arg0 compare to 0, float64 306 307 // moves 308 {name: "MOVWconst", argLength: 0, reg: gp01, aux: "Int32", asm: "MOVW", typ: "UInt32", rematerializeable: true}, // 32 low bits of auxint 309 {name: "MOVFconst", argLength: 0, reg: fp01, aux: "Float64", asm: "MOVF", typ: "Float32", rematerializeable: true}, // auxint as 64-bit float, convert to 32-bit float 310 {name: "MOVDconst", argLength: 0, reg: fp01, aux: "Float64", asm: "MOVD", typ: "Float64", rematerializeable: true}, // auxint as 64-bit float 311 312 {name: "MOVWaddr", argLength: 1, reg: regInfo{inputs: []regMask{buildReg("SP") | buildReg("SB")}, outputs: []regMask{gp}}, aux: "SymOff", asm: "MOVW", rematerializeable: true}, // arg0 + auxInt + aux.(*gc.Sym), arg0=SP/SB 313 314 {name: "MOVBload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVB", typ: "Int8"}, // load from arg0 + auxInt + aux. arg1=mem. 315 {name: "MOVBUload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVBU", typ: "UInt8"}, // load from arg0 + auxInt + aux. arg1=mem. 316 {name: "MOVHload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVH", typ: "Int16"}, // load from arg0 + auxInt + aux. arg1=mem. 317 {name: "MOVHUload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVHU", typ: "UInt16"}, // load from arg0 + auxInt + aux. arg1=mem. 318 {name: "MOVWload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVW", typ: "UInt32"}, // load from arg0 + auxInt + aux. arg1=mem. 319 {name: "MOVFload", argLength: 2, reg: fpload, aux: "SymOff", asm: "MOVF", typ: "Float32"}, // load from arg0 + auxInt + aux. arg1=mem. 320 {name: "MOVDload", argLength: 2, reg: fpload, aux: "SymOff", asm: "MOVD", typ: "Float64"}, // load from arg0 + auxInt + aux. arg1=mem. 321 322 {name: "MOVBstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVB", typ: "Mem"}, // store 1 byte of arg1 to arg0 + auxInt + aux. arg2=mem. 323 {name: "MOVHstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVH", typ: "Mem"}, // store 2 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. 324 {name: "MOVWstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVW", typ: "Mem"}, // store 4 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. 325 {name: "MOVFstore", argLength: 3, reg: fpstore, aux: "SymOff", asm: "MOVF", typ: "Mem"}, // store 4 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. 326 {name: "MOVDstore", argLength: 3, reg: fpstore, aux: "SymOff", asm: "MOVD", typ: "Mem"}, // store 8 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. 327 328 {name: "MOVWloadidx", argLength: 3, reg: gp2load, asm: "MOVW"}, // load from arg0 + arg1. arg2=mem 329 {name: "MOVWloadshiftLL", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1<<auxInt. arg2=mem 330 {name: "MOVWloadshiftRL", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1>>auxInt, unsigned shift. arg2=mem 331 {name: "MOVWloadshiftRA", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1>>auxInt, signed shift. arg2=mem 332 333 {name: "MOVWstoreidx", argLength: 4, reg: gp2store, asm: "MOVW"}, // store arg2 to arg0 + arg1. arg3=mem 334 {name: "MOVWstoreshiftLL", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1<<auxInt. arg3=mem 335 {name: "MOVWstoreshiftRL", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1>>auxInt, unsigned shift. arg3=mem 336 {name: "MOVWstoreshiftRA", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1>>auxInt, signed shift. arg3=mem 337 338 {name: "MOVBreg", argLength: 1, reg: gp11, asm: "MOVBS"}, // move from arg0, sign-extended from byte 339 {name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte 340 {name: "MOVHreg", argLength: 1, reg: gp11, asm: "MOVHS"}, // move from arg0, sign-extended from half 341 {name: "MOVHUreg", argLength: 1, reg: gp11, asm: "MOVHU"}, // move from arg0, unsign-extended from half 342 {name: "MOVWreg", argLength: 1, reg: gp11, asm: "MOVW"}, // move from arg0 343 344 {name: "MOVWnop", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{gp}}, resultInArg0: true}, // nop, return arg0 in same register 345 346 {name: "MOVWF", argLength: 1, reg: gpfp, asm: "MOVWF"}, // int32 -> float32 347 {name: "MOVWD", argLength: 1, reg: gpfp, asm: "MOVWD"}, // int32 -> float64 348 {name: "MOVWUF", argLength: 1, reg: gpfp, asm: "MOVWF"}, // uint32 -> float32, set U bit in the instruction 349 {name: "MOVWUD", argLength: 1, reg: gpfp, asm: "MOVWD"}, // uint32 -> float64, set U bit in the instruction 350 {name: "MOVFW", argLength: 1, reg: fpgp, asm: "MOVFW"}, // float32 -> int32 351 {name: "MOVDW", argLength: 1, reg: fpgp, asm: "MOVDW"}, // float64 -> int32 352 {name: "MOVFWU", argLength: 1, reg: fpgp, asm: "MOVFW"}, // float32 -> uint32, set U bit in the instruction 353 {name: "MOVDWU", argLength: 1, reg: fpgp, asm: "MOVDW"}, // float64 -> uint32, set U bit in the instruction 354 {name: "MOVFD", argLength: 1, reg: fp11, asm: "MOVFD"}, // float32 -> float64 355 {name: "MOVDF", argLength: 1, reg: fp11, asm: "MOVDF"}, // float64 -> float32 356 357 // conditional instructions, for lowering shifts 358 {name: "CMOVWHSconst", argLength: 2, reg: gp1flags1, asm: "MOVW", aux: "Int32", resultInArg0: true}, // replace arg0 w/ const if flags indicates HS, arg1=flags 359 {name: "CMOVWLSconst", argLength: 2, reg: gp1flags1, asm: "MOVW", aux: "Int32", resultInArg0: true}, // replace arg0 w/ const if flags indicates LS, arg1=flags 360 {name: "SRAcond", argLength: 3, reg: gp2flags1, asm: "SRA"}, // arg0 >> 31 if flags indicates HS, arg0 >> arg1 otherwise, signed shift, arg2=flags 361 362 // function calls 363 {name: "CALLstatic", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "SymOff", clobberFlags: true}, // call static function aux.(*gc.Sym). arg0=mem, auxint=argsize, returns mem 364 {name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("R7"), 0}, clobbers: callerSave}, aux: "Int64", clobberFlags: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem 365 {name: "CALLdefer", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "Int64", clobberFlags: true}, // call deferproc. arg0=mem, auxint=argsize, returns mem 366 {name: "CALLgo", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "Int64", clobberFlags: true}, // call newproc. arg0=mem, auxint=argsize, returns mem 367 {name: "CALLinter", argLength: 2, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "Int64", clobberFlags: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem 368 369 // pseudo-ops 370 {name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{gpg}}}, // panic if arg0 is nil. arg1=mem. 371 372 {name: "Equal", argLength: 1, reg: readflags}, // bool, true flags encode x==y false otherwise. 373 {name: "NotEqual", argLength: 1, reg: readflags}, // bool, true flags encode x!=y false otherwise. 374 {name: "LessThan", argLength: 1, reg: readflags}, // bool, true flags encode signed x<y false otherwise. 375 {name: "LessEqual", argLength: 1, reg: readflags}, // bool, true flags encode signed x<=y false otherwise. 376 {name: "GreaterThan", argLength: 1, reg: readflags}, // bool, true flags encode signed x>y false otherwise. 377 {name: "GreaterEqual", argLength: 1, reg: readflags}, // bool, true flags encode signed x>=y false otherwise. 378 {name: "LessThanU", argLength: 1, reg: readflags}, // bool, true flags encode unsigned x<y false otherwise. 379 {name: "LessEqualU", argLength: 1, reg: readflags}, // bool, true flags encode unsigned x<=y false otherwise. 380 {name: "GreaterThanU", argLength: 1, reg: readflags}, // bool, true flags encode unsigned x>y false otherwise. 381 {name: "GreaterEqualU", argLength: 1, reg: readflags}, // bool, true flags encode unsigned x>=y false otherwise. 382 383 // duffzero (must be 4-byte aligned) 384 // arg0 = address of memory to zero (in R1, changed as side effect) 385 // arg1 = value to store (always zero) 386 // arg2 = mem 387 // auxint = offset into duffzero code to start executing 388 // returns mem 389 { 390 name: "DUFFZERO", 391 aux: "Int64", 392 argLength: 3, 393 reg: regInfo{ 394 inputs: []regMask{buildReg("R1"), buildReg("R0")}, 395 clobbers: buildReg("R1"), 396 }, 397 }, 398 399 // duffcopy (must be 4-byte aligned) 400 // arg0 = address of dst memory (in R2, changed as side effect) 401 // arg1 = address of src memory (in R1, changed as side effect) 402 // arg2 = mem 403 // auxint = offset into duffcopy code to start executing 404 // returns mem 405 { 406 name: "DUFFCOPY", 407 aux: "Int64", 408 argLength: 3, 409 reg: regInfo{ 410 inputs: []regMask{buildReg("R2"), buildReg("R1")}, 411 clobbers: buildReg("R0 R1 R2"), 412 }, 413 }, 414 415 // large or unaligned zeroing 416 // arg0 = address of memory to zero (in R1, changed as side effect) 417 // arg1 = address of the last element to zero 418 // arg2 = value to store (always zero) 419 // arg3 = mem 420 // returns mem 421 // MOVW.P Rarg2, 4(R1) 422 // CMP R1, Rarg1 423 // BLE -2(PC) 424 { 425 name: "LoweredZero", 426 aux: "Int64", 427 argLength: 4, 428 reg: regInfo{ 429 inputs: []regMask{buildReg("R1"), gp, gp}, 430 clobbers: buildReg("R1"), 431 }, 432 clobberFlags: true, 433 }, 434 435 // large or unaligned move 436 // arg0 = address of dst memory (in R2, changed as side effect) 437 // arg1 = address of src memory (in R1, changed as side effect) 438 // arg2 = address of the last element of src 439 // arg3 = mem 440 // returns mem 441 // MOVW.P 4(R1), Rtmp 442 // MOVW.P Rtmp, 4(R2) 443 // CMP R1, Rarg2 444 // BLE -3(PC) 445 { 446 name: "LoweredMove", 447 aux: "Int64", 448 argLength: 4, 449 reg: regInfo{ 450 inputs: []regMask{buildReg("R2"), buildReg("R1"), gp}, 451 clobbers: buildReg("R1 R2"), 452 }, 453 clobberFlags: true, 454 }, 455 456 // Scheduler ensures LoweredGetClosurePtr occurs only in entry block, 457 // and sorts it to the very beginning of the block to prevent other 458 // use of R7 (arm.REGCTXT, the closure pointer) 459 {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R7")}}}, 460 461 // MOVWconvert converts between pointers and integers. 462 // We have a special op for this so as to not confuse GC 463 // (particularly stack maps). It takes a memory arg so it 464 // gets correctly ordered with respect to GC safepoints. 465 // arg0=ptr/int arg1=mem, output=int/ptr 466 {name: "MOVWconvert", argLength: 2, reg: gp11, asm: "MOVW"}, 467 468 // Constant flag values. For any comparison, there are 5 possible 469 // outcomes: the three from the signed total order (<,==,>) and the 470 // three from the unsigned total order. The == cases overlap. 471 // Note: there's a sixth "unordered" outcome for floating-point 472 // comparisons, but we don't use such a beast yet. 473 // These ops are for temporary use by rewrite rules. They 474 // cannot appear in the generated assembly. 475 {name: "FlagEQ"}, // equal 476 {name: "FlagLT_ULT"}, // signed < and unsigned < 477 {name: "FlagLT_UGT"}, // signed < and unsigned > 478 {name: "FlagGT_UGT"}, // signed > and unsigned < 479 {name: "FlagGT_ULT"}, // signed > and unsigned > 480 481 // (InvertFlags (CMP a b)) == (CMP b a) 482 // InvertFlags is a pseudo-op which can't appear in assembly output. 483 {name: "InvertFlags", argLength: 1}, // reverse direction of arg0 484 } 485 486 blocks := []blockData{ 487 {name: "EQ"}, 488 {name: "NE"}, 489 {name: "LT"}, 490 {name: "LE"}, 491 {name: "GT"}, 492 {name: "GE"}, 493 {name: "ULT"}, 494 {name: "ULE"}, 495 {name: "UGT"}, 496 {name: "UGE"}, 497 } 498 499 archs = append(archs, arch{ 500 name: "ARM", 501 pkg: "cmd/internal/obj/arm", 502 genfile: "../../arm/ssa.go", 503 ops: ops, 504 blocks: blocks, 505 regnames: regNamesARM, 506 gpregmask: gp, 507 fpregmask: fp, 508 framepointerreg: -1, // not used 509 }) 510 }