test/codegen/mathbits.go

   1 // asmcheck
   2
   3 // Copyright 2018 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 package codegen
   8
   9 import "math/bits"
  10
  11 // ----------------------- //
  12 //    bits.LeadingZeros    //
  13 // ----------------------- //
  14
  15 func LeadingZeros(n uint) int {
  16         // amd64:"BSRQ"
  17         // s390x:"FLOGR"
  18         // arm:"CLZ" arm64:"CLZ"
  19         // mips:"CLZ"
  20         // wasm:"I64Clz"
  21         return bits.LeadingZeros(n)
  22 }
  23
  24 func LeadingZeros64(n uint64) int {
  25         // amd64:"BSRQ"
  26         // s390x:"FLOGR"
  27         // arm:"CLZ" arm64:"CLZ"
  28         // mips:"CLZ"
  29         // wasm:"I64Clz"
  30         return bits.LeadingZeros64(n)
  31 }
  32
  33 func LeadingZeros32(n uint32) int {
  34         // amd64:"BSRQ","LEAQ",-"CMOVQEQ"
  35         // s390x:"FLOGR"
  36         // arm:"CLZ" arm64:"CLZW"
  37         // mips:"CLZ"
  38         // wasm:"I64Clz"
  39         return bits.LeadingZeros32(n)
  40 }
  41
  42 func LeadingZeros16(n uint16) int {
  43         // amd64:"BSRL","LEAL",-"CMOVQEQ"
  44         // s390x:"FLOGR"
  45         // arm:"CLZ" arm64:"CLZ"
  46         // mips:"CLZ"
  47         // wasm:"I64Clz"
  48         return bits.LeadingZeros16(n)
  49 }
  50
  51 func LeadingZeros8(n uint8) int {
  52         // amd64:"BSRL","LEAL",-"CMOVQEQ"
  53         // s390x:"FLOGR"
  54         // arm:"CLZ" arm64:"CLZ"
  55         // mips:"CLZ"
  56         // wasm:"I64Clz"
  57         return bits.LeadingZeros8(n)
  58 }
  59
  60 // --------------- //
  61 //    bits.Len*    //
  62 // --------------- //
  63
  64 func Len(n uint) int {
  65         // amd64:"BSRQ"
  66         // s390x:"FLOGR"
  67         // arm:"CLZ" arm64:"CLZ"
  68         // mips:"CLZ"
  69         // wasm:"I64Clz"
  70         return bits.Len(n)
  71 }
  72
  73 func Len64(n uint64) int {
  74         // amd64:"BSRQ"
  75         // s390x:"FLOGR"
  76         // arm:"CLZ" arm64:"CLZ"
  77         // mips:"CLZ"
  78         // wasm:"I64Clz"
  79         return bits.Len64(n)
  80 }
  81
  82 func Len32(n uint32) int {
  83         // amd64:"BSRQ","LEAQ",-"CMOVQEQ"
  84         // s390x:"FLOGR"
  85         // arm:"CLZ" arm64:"CLZ"
  86         // mips:"CLZ"
  87         // wasm:"I64Clz"
  88         return bits.Len32(n)
  89 }
  90
  91 func Len16(n uint16) int {
  92         // amd64:"BSRL","LEAL",-"CMOVQEQ"
  93         // s390x:"FLOGR"
  94         // arm:"CLZ" arm64:"CLZ"
  95         // mips:"CLZ"
  96         // wasm:"I64Clz"
  97         return bits.Len16(n)
  98 }
  99
 100 func Len8(n uint8) int {
 101         // amd64:"BSRL","LEAL",-"CMOVQEQ"
 102         // s390x:"FLOGR"
 103         // arm:"CLZ" arm64:"CLZ"
 104         // mips:"CLZ"
 105         // wasm:"I64Clz"
 106         return bits.Len8(n)
 107 }
 108
 109 // -------------------- //
 110 //    bits.OnesCount    //
 111 // -------------------- //
 112
 113 func OnesCount(n uint) int {
 114         // amd64:"POPCNTQ",".*x86HasPOPCNT"
 115         // arm64:"VCNT","VUADDLV"
 116         // s390x:"POPCNT"
 117         // ppc64:"POPCNTD"
 118         // ppc64le:"POPCNTD"
 119         // wasm:"I64Popcnt"
 120         return bits.OnesCount(n)
 121 }
 122
 123 func OnesCount64(n uint64) int {
 124         // amd64:"POPCNTQ",".*x86HasPOPCNT"
 125         // arm64:"VCNT","VUADDLV"
 126         // s390x:"POPCNT"
 127         // ppc64:"POPCNTD"
 128         // ppc64le:"POPCNTD"
 129         // wasm:"I64Popcnt"
 130         return bits.OnesCount64(n)
 131 }
 132
 133 func OnesCount32(n uint32) int {
 134         // amd64:"POPCNTL",".*x86HasPOPCNT"
 135         // arm64:"VCNT","VUADDLV"
 136         // s390x:"POPCNT"
 137         // ppc64:"POPCNTW"
 138         // ppc64le:"POPCNTW"
 139         // wasm:"I64Popcnt"
 140         return bits.OnesCount32(n)
 141 }
 142
 143 func OnesCount16(n uint16) int {
 144         // amd64:"POPCNTL",".*x86HasPOPCNT"
 145         // arm64:"VCNT","VUADDLV"
 146         // s390x:"POPCNT"
 147         // ppc64:"POPCNTW"
 148         // ppc64le:"POPCNTW"
 149         // wasm:"I64Popcnt"
 150         return bits.OnesCount16(n)
 151 }
 152
 153 func OnesCount8(n uint8) int {
 154         // s390x:"POPCNT"
 155         // ppc64:"POPCNTB"
 156         // ppc64le:"POPCNTB"
 157         // wasm:"I64Popcnt"
 158         return bits.OnesCount8(n)
 159 }
 160
 161 // ----------------------- //
 162 //    bits.ReverseBytes    //
 163 // ----------------------- //
 164
 165 func ReverseBytes(n uint) uint {
 166         // amd64:"BSWAPQ"
 167         // s390x:"MOVDBR"
 168         // arm64:"REV"
 169         return bits.ReverseBytes(n)
 170 }
 171
 172 func ReverseBytes64(n uint64) uint64 {
 173         // amd64:"BSWAPQ"
 174         // s390x:"MOVDBR"
 175         // arm64:"REV"
 176         return bits.ReverseBytes64(n)
 177 }
 178
 179 func ReverseBytes32(n uint32) uint32 {
 180         // amd64:"BSWAPL"
 181         // s390x:"MOVWBR"
 182         // arm64:"REVW"
 183         return bits.ReverseBytes32(n)
 184 }
 185
 186 func ReverseBytes16(n uint16) uint16 {
 187         // amd64:"ROLW"
 188         // arm64:"REV16W",-"UBFX",-"ORR"
 189         // arm/5:"SLL","SRL","ORR"
 190         // arm/6:"REV16"
 191         // arm/7:"REV16"
 192         return bits.ReverseBytes16(n)
 193 }
 194
 195 // --------------------- //
 196 //    bits.RotateLeft    //
 197 // --------------------- //
 198
 199 func RotateLeft64(n uint64) uint64 {
 200         // amd64:"ROLQ"
 201         // arm64:"ROR"
 202         // ppc64:"ROTL"
 203         // ppc64le:"ROTL"
 204         // s390x:"RLLG"
 205         // wasm:"I64Rotl"
 206         return bits.RotateLeft64(n, 37)
 207 }
 208
 209 func RotateLeft32(n uint32) uint32 {
 210         // amd64:"ROLL" 386:"ROLL"
 211         // arm64:"RORW"
 212         // ppc64:"ROTLW"
 213         // ppc64le:"ROTLW"
 214         // s390x:"RLL"
 215         return bits.RotateLeft32(n, 9)
 216 }
 217
 218 func RotateLeft16(n uint16) uint16 {
 219         // amd64:"ROLW" 386:"ROLW"
 220         return bits.RotateLeft16(n, 5)
 221 }
 222
 223 func RotateLeft8(n uint8) uint8 {
 224         // amd64:"ROLB" 386:"ROLB"
 225         return bits.RotateLeft8(n, 5)
 226 }
 227
 228 func RotateLeftVariable(n uint, m int) uint {
 229         // amd64:"ROLQ"
 230         // arm64:"ROR"
 231         // ppc64:"ROTL"
 232         // ppc64le:"ROTL"
 233         // s390x:"RLLG"
 234         return bits.RotateLeft(n, m)
 235 }
 236
 237 func RotateLeftVariable64(n uint64, m int) uint64 {
 238         // amd64:"ROLQ"
 239         // arm64:"ROR"
 240         // ppc64:"ROTL"
 241         // ppc64le:"ROTL"
 242         // s390x:"RLLG"
 243         return bits.RotateLeft64(n, m)
 244 }
 245
 246 func RotateLeftVariable32(n uint32, m int) uint32 {
 247         // amd64:"ROLL"
 248         // arm64:"RORW"
 249         // ppc64:"ROTLW"
 250         // ppc64le:"ROTLW"
 251         // s390x:"RLL"
 252         return bits.RotateLeft32(n, m)
 253 }
 254
 255 // ------------------------ //
 256 //    bits.TrailingZeros    //
 257 // ------------------------ //
 258
 259 func TrailingZeros(n uint) int {
 260         // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ"
 261         // arm:"CLZ"
 262         // arm64:"RBIT","CLZ"
 263         // s390x:"FLOGR"
 264         // ppc64:"ANDN","POPCNTD"
 265         // ppc64le:"ANDN","POPCNTD"
 266         // wasm:"I64Ctz"
 267         return bits.TrailingZeros(n)
 268 }
 269
 270 func TrailingZeros64(n uint64) int {
 271         // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ"
 272         // arm64:"RBIT","CLZ"
 273         // s390x:"FLOGR"
 274         // ppc64:"ANDN","POPCNTD"
 275         // ppc64le:"ANDN","POPCNTD"
 276         // wasm:"I64Ctz"
 277         return bits.TrailingZeros64(n)
 278 }
 279
 280 func TrailingZeros32(n uint32) int {
 281         // amd64:"BTSQ\\t\\$32","BSFQ"
 282         // arm:"CLZ"
 283         // arm64:"RBITW","CLZW"
 284         // s390x:"FLOGR","MOVWZ"
 285         // ppc64:"ANDN","POPCNTW"
 286         // ppc64le:"ANDN","POPCNTW"
 287         // wasm:"I64Ctz"
 288         return bits.TrailingZeros32(n)
 289 }
 290
 291 func TrailingZeros16(n uint16) int {
 292         // amd64:"BSFL","BTSL\\t\\$16"
 293         // arm:"ORR\t\\$65536","CLZ",-"MOVHU\tR"
 294         // arm64:"ORR\t\\$65536","RBITW","CLZW",-"MOVHU\tR",-"RBIT\t",-"CLZ\t"
 295         // s390x:"FLOGR","OR\t\\$65536"
 296         // ppc64:"POPCNTD","OR\\t\\$65536"
 297         // ppc64le:"POPCNTD","OR\\t\\$65536"
 298         // wasm:"I64Ctz"
 299         return bits.TrailingZeros16(n)
 300 }
 301
 302 func TrailingZeros8(n uint8) int {
 303         // amd64:"BSFL","BTSL\\t\\$8"
 304         // arm:"ORR\t\\$256","CLZ",-"MOVBU\tR"
 305         // arm64:"ORR\t\\$256","RBITW","CLZW",-"MOVBU\tR",-"RBIT\t",-"CLZ\t"
 306         // s390x:"FLOGR","OR\t\\$256"
 307         // wasm:"I64Ctz"
 308         return bits.TrailingZeros8(n)
 309 }
 310
 311 // IterateBitsNN checks special handling of TrailingZerosNN when the input is known to be non-zero.
 312
 313 func IterateBits(n uint) int {
 314         i := 0
 315         for n != 0 {
 316                 // amd64:"BSFQ",-"CMOVEQ"
 317                 i += bits.TrailingZeros(n)
 318                 n &= n - 1
 319         }
 320         return i
 321 }
 322
 323 func IterateBits64(n uint64) int {
 324         i := 0
 325         for n != 0 {
 326                 // amd64:"BSFQ",-"CMOVEQ"
 327                 i += bits.TrailingZeros64(n)
 328                 n &= n - 1
 329         }
 330         return i
 331 }
 332
 333 func IterateBits32(n uint32) int {
 334         i := 0
 335         for n != 0 {
 336                 // amd64:"BSFL",-"BTSQ"
 337                 i += bits.TrailingZeros32(n)
 338                 n &= n - 1
 339         }
 340         return i
 341 }
 342
 343 func IterateBits16(n uint16) int {
 344         i := 0
 345         for n != 0 {
 346                 // amd64:"BSFL",-"BTSL"
 347                 // arm64:"RBITW","CLZW",-"ORR"
 348                 i += bits.TrailingZeros16(n)
 349                 n &= n - 1
 350         }
 351         return i
 352 }
 353
 354 func IterateBits8(n uint8) int {
 355         i := 0
 356         for n != 0 {
 357                 // amd64:"BSFL",-"BTSL"
 358                 // arm64:"RBITW","CLZW",-"ORR"
 359                 i += bits.TrailingZeros8(n)
 360                 n &= n - 1
 361         }
 362         return i
 363 }
 364
 365 // --------------- //
 366 //    bits.Add*    //
 367 // --------------- //
 368
 369 func Add(x, y, ci uint) (r, co uint) {
 370         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 371         return bits.Add(x, y, ci)
 372 }
 373
 374 func AddC(x, ci uint) (r, co uint) {
 375         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 376         return bits.Add(x, 7, ci)
 377 }
 378
 379 func AddZ(x, y uint) (r, co uint) {
 380         // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
 381         return bits.Add(x, y, 0)
 382 }
 383
 384 func AddR(x, y, ci uint) uint {
 385         // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
 386         r, _ := bits.Add(x, y, ci)
 387         return r
 388 }
 389 func AddM(p, q, r *[3]uint) {
 390         var c uint
 391         r[0], c = bits.Add(p[0], q[0], c)
 392         // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
 393         r[1], c = bits.Add(p[1], q[1], c)
 394         r[2], c = bits.Add(p[2], q[2], c)
 395 }
 396
 397 func Add64(x, y, ci uint64) (r, co uint64) {
 398         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 399         return bits.Add64(x, y, ci)
 400 }
 401
 402 func Add64C(x, ci uint64) (r, co uint64) {
 403         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 404         return bits.Add64(x, 7, ci)
 405 }
 406
 407 func Add64Z(x, y uint64) (r, co uint64) {
 408         // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
 409         return bits.Add64(x, y, 0)
 410 }
 411
 412 func Add64R(x, y, ci uint64) uint64 {
 413         // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
 414         r, _ := bits.Add64(x, y, ci)
 415         return r
 416 }
 417 func Add64M(p, q, r *[3]uint64) {
 418         var c uint64
 419         r[0], c = bits.Add64(p[0], q[0], c)
 420         // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
 421         r[1], c = bits.Add64(p[1], q[1], c)
 422         r[2], c = bits.Add64(p[2], q[2], c)
 423 }
 424
 425 // --------------- //
 426 //    bits.Sub*    //
 427 // --------------- //
 428
 429 func Sub(x, y, ci uint) (r, co uint) {
 430         // amd64:"NEGL","SBBQ","NEGQ"
 431         return bits.Sub(x, y, ci)
 432 }
 433
 434 func SubC(x, ci uint) (r, co uint) {
 435         // amd64:"NEGL","SBBQ","NEGQ"
 436         return bits.Sub(x, 7, ci)
 437 }
 438
 439 func SubZ(x, y uint) (r, co uint) {
 440         // amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
 441         return bits.Sub(x, y, 0)
 442 }
 443
 444 func SubR(x, y, ci uint) uint {
 445         // amd64:"NEGL","SBBQ",-"NEGQ"
 446         r, _ := bits.Sub(x, y, ci)
 447         return r
 448 }
 449 func SubM(p, q, r *[3]uint) {
 450         var c uint
 451         r[0], c = bits.Sub(p[0], q[0], c)
 452         // amd64:"SBBQ",-"NEGL",-"NEGQ"
 453         r[1], c = bits.Sub(p[1], q[1], c)
 454         r[2], c = bits.Sub(p[2], q[2], c)
 455 }
 456
 457 func Sub64(x, y, ci uint64) (r, co uint64) {
 458         // amd64:"NEGL","SBBQ","NEGQ"
 459         return bits.Sub64(x, y, ci)
 460 }
 461
 462 func Sub64C(x, ci uint64) (r, co uint64) {
 463         // amd64:"NEGL","SBBQ","NEGQ"
 464         return bits.Sub64(x, 7, ci)
 465 }
 466
 467 func Sub64Z(x, y uint64) (r, co uint64) {
 468         // amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
 469         return bits.Sub64(x, y, 0)
 470 }
 471
 472 func Sub64R(x, y, ci uint64) uint64 {
 473         // amd64:"NEGL","SBBQ",-"NEGQ"
 474         r, _ := bits.Sub64(x, y, ci)
 475         return r
 476 }
 477 func Sub64M(p, q, r *[3]uint64) {
 478         var c uint64
 479         r[0], c = bits.Sub64(p[0], q[0], c)
 480         // amd64:"SBBQ",-"NEGL",-"NEGQ"
 481         r[1], c = bits.Sub64(p[1], q[1], c)
 482         r[2], c = bits.Sub64(p[2], q[2], c)
 483 }
 484
 485 // --------------- //
 486 //    bits.Mul*    //
 487 // --------------- //
 488
 489 func Mul(x, y uint) (hi, lo uint) {
 490         // amd64:"MULQ"
 491         // arm64:"UMULH","MUL"
 492         // ppc64:"MULHDU","MULLD"
 493         // ppc64le:"MULHDU","MULLD"
 494         return bits.Mul(x, y)
 495 }
 496
 497 func Mul64(x, y uint64) (hi, lo uint64) {
 498         // amd64:"MULQ"
 499         // arm64:"UMULH","MUL"
 500         // ppc64:"MULHDU","MULLD"
 501         // ppc64le:"MULHDU","MULLD"
 502         return bits.Mul64(x, y)
 503 }
 504
 505 // --------------- //
 506 //    bits.Div*    //
 507 // --------------- //
 508
 509 func Div(hi, lo, x uint) (q, r uint) {
 510         // amd64:"DIVQ"
 511         return bits.Div(hi, lo, x)
 512 }
 513
 514 func Div32(hi, lo, x uint32) (q, r uint32) {
 515         // arm64:"ORR","UDIV","MSUB",-"UREM"
 516         return bits.Div32(hi, lo, x)
 517 }
 518
 519 func Div64(hi, lo, x uint64) (q, r uint64) {
 520         // amd64:"DIVQ"
 521         return bits.Div64(hi, lo, x)
 522 }