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         // arm64:"RBIT","CLZ"
 262         // s390x:"FLOGR"
 263         // ppc64:"ANDN","POPCNTD"
 264         // ppc64le:"ANDN","POPCNTD"
 265         // wasm:"I64Ctz"
 266         return bits.TrailingZeros(n)
 267 }
 268
 269 func TrailingZeros64(n uint64) int {
 270         // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ"
 271         // arm64:"RBIT","CLZ"
 272         // s390x:"FLOGR"
 273         // ppc64:"ANDN","POPCNTD"
 274         // ppc64le:"ANDN","POPCNTD"
 275         // wasm:"I64Ctz"
 276         return bits.TrailingZeros64(n)
 277 }
 278
 279 func TrailingZeros32(n uint32) int {
 280         // amd64:"BTSQ\\t\\$32","BSFQ"
 281         // arm64:"RBITW","CLZW"
 282         // s390x:"FLOGR","MOVWZ"
 283         // ppc64:"ANDN","POPCNTW"
 284         // ppc64le:"ANDN","POPCNTW"
 285         // wasm:"I64Ctz"
 286         return bits.TrailingZeros32(n)
 287 }
 288
 289 func TrailingZeros16(n uint16) int {
 290         // amd64:"BSFL","BTSL\\t\\$16"
 291         // arm64:"ORR\t\\$65536","RBITW","CLZW",-"MOVHU\tR",-"RBIT\t",-"CLZ\t"
 292         // s390x:"FLOGR","OR\t\\$65536"
 293         // ppc64:"POPCNTD","OR\\t\\$65536"
 294         // ppc64le:"POPCNTD","OR\\t\\$65536"
 295         // wasm:"I64Ctz"
 296         return bits.TrailingZeros16(n)
 297 }
 298
 299 func TrailingZeros8(n uint8) int {
 300         // amd64:"BSFL","BTSL\\t\\$8"
 301         // arm64:"ORR\t\\$256","RBITW","CLZW",-"MOVBU\tR",-"RBIT\t",-"CLZ\t"
 302         // s390x:"FLOGR","OR\t\\$256"
 303         // wasm:"I64Ctz"
 304         return bits.TrailingZeros8(n)
 305 }
 306
 307 // IterateBitsNN checks special handling of TrailingZerosNN when the input is known to be non-zero.
 308
 309 func IterateBits(n uint) int {
 310         i := 0
 311         for n != 0 {
 312                 // amd64:"BSFQ",-"CMOVEQ"
 313                 i += bits.TrailingZeros(n)
 314                 n &= n - 1
 315         }
 316         return i
 317 }
 318
 319 func IterateBits64(n uint64) int {
 320         i := 0
 321         for n != 0 {
 322                 // amd64:"BSFQ",-"CMOVEQ"
 323                 i += bits.TrailingZeros64(n)
 324                 n &= n - 1
 325         }
 326         return i
 327 }
 328
 329 func IterateBits32(n uint32) int {
 330         i := 0
 331         for n != 0 {
 332                 // amd64:"BSFL",-"BTSQ"
 333                 i += bits.TrailingZeros32(n)
 334                 n &= n - 1
 335         }
 336         return i
 337 }
 338
 339 func IterateBits16(n uint16) int {
 340         i := 0
 341         for n != 0 {
 342                 // amd64:"BSFL",-"BTSL"
 343                 // arm64:"RBITW","CLZW",-"ORR"
 344                 i += bits.TrailingZeros16(n)
 345                 n &= n - 1
 346         }
 347         return i
 348 }
 349
 350 func IterateBits8(n uint8) int {
 351         i := 0
 352         for n != 0 {
 353                 // amd64:"BSFL",-"BTSL"
 354                 // arm64:"RBITW","CLZW",-"ORR"
 355                 i += bits.TrailingZeros8(n)
 356                 n &= n - 1
 357         }
 358         return i
 359 }
 360
 361 // --------------- //
 362 //    bits.Add*    //
 363 // --------------- //
 364
 365 func Add(x, y, ci uint) (r, co uint) {
 366         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 367         return bits.Add(x, y, ci)
 368 }
 369
 370 func AddC(x, ci uint) (r, co uint) {
 371         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 372         return bits.Add(x, 7, ci)
 373 }
 374
 375 func AddZ(x, y uint) (r, co uint) {
 376         // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
 377         return bits.Add(x, y, 0)
 378 }
 379
 380 func AddR(x, y, ci uint) uint {
 381         // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
 382         r, _ := bits.Add(x, y, ci)
 383         return r
 384 }
 385 func AddM(p, q, r *[3]uint) {
 386         var c uint
 387         r[0], c = bits.Add(p[0], q[0], c)
 388         // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
 389         r[1], c = bits.Add(p[1], q[1], c)
 390         r[2], c = bits.Add(p[2], q[2], c)
 391 }
 392
 393 func Add64(x, y, ci uint64) (r, co uint64) {
 394         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 395         return bits.Add64(x, y, ci)
 396 }
 397
 398 func Add64C(x, ci uint64) (r, co uint64) {
 399         // amd64:"NEGL","ADCQ","SBBQ","NEGQ"
 400         return bits.Add64(x, 7, ci)
 401 }
 402
 403 func Add64Z(x, y uint64) (r, co uint64) {
 404         // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
 405         return bits.Add64(x, y, 0)
 406 }
 407
 408 func Add64R(x, y, ci uint64) uint64 {
 409         // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
 410         r, _ := bits.Add64(x, y, ci)
 411         return r
 412 }
 413 func Add64M(p, q, r *[3]uint64) {
 414         var c uint64
 415         r[0], c = bits.Add64(p[0], q[0], c)
 416         // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
 417         r[1], c = bits.Add64(p[1], q[1], c)
 418         r[2], c = bits.Add64(p[2], q[2], c)
 419 }
 420
 421 // --------------- //
 422 //    bits.Sub*    //
 423 // --------------- //
 424
 425 func Sub(x, y, ci uint) (r, co uint) {
 426         // amd64:"NEGL","SBBQ","NEGQ"
 427         return bits.Sub(x, y, ci)
 428 }
 429
 430 func SubC(x, ci uint) (r, co uint) {
 431         // amd64:"NEGL","SBBQ","NEGQ"
 432         return bits.Sub(x, 7, ci)
 433 }
 434
 435 func SubZ(x, y uint) (r, co uint) {
 436         // amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
 437         return bits.Sub(x, y, 0)
 438 }
 439
 440 func SubR(x, y, ci uint) uint {
 441         // amd64:"NEGL","SBBQ",-"NEGQ"
 442         r, _ := bits.Sub(x, y, ci)
 443         return r
 444 }
 445 func SubM(p, q, r *[3]uint) {
 446         var c uint
 447         r[0], c = bits.Sub(p[0], q[0], c)
 448         // amd64:"SBBQ",-"NEGL",-"NEGQ"
 449         r[1], c = bits.Sub(p[1], q[1], c)
 450         r[2], c = bits.Sub(p[2], q[2], c)
 451 }
 452
 453 func Sub64(x, y, ci uint64) (r, co uint64) {
 454         // amd64:"NEGL","SBBQ","NEGQ"
 455         return bits.Sub64(x, y, ci)
 456 }
 457
 458 func Sub64C(x, ci uint64) (r, co uint64) {
 459         // amd64:"NEGL","SBBQ","NEGQ"
 460         return bits.Sub64(x, 7, ci)
 461 }
 462
 463 func Sub64Z(x, y uint64) (r, co uint64) {
 464         // amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
 465         return bits.Sub64(x, y, 0)
 466 }
 467
 468 func Sub64R(x, y, ci uint64) uint64 {
 469         // amd64:"NEGL","SBBQ",-"NEGQ"
 470         r, _ := bits.Sub64(x, y, ci)
 471         return r
 472 }
 473 func Sub64M(p, q, r *[3]uint64) {
 474         var c uint64
 475         r[0], c = bits.Sub64(p[0], q[0], c)
 476         // amd64:"SBBQ",-"NEGL",-"NEGQ"
 477         r[1], c = bits.Sub64(p[1], q[1], c)
 478         r[2], c = bits.Sub64(p[2], q[2], c)
 479 }
 480
 481 // --------------- //
 482 //    bits.Mul*    //
 483 // --------------- //
 484
 485 func Mul(x, y uint) (hi, lo uint) {
 486         // amd64:"MULQ"
 487         // arm64:"UMULH","MUL"
 488         // ppc64:"MULHDU","MULLD"
 489         // ppc64le:"MULHDU","MULLD"
 490         return bits.Mul(x, y)
 491 }
 492
 493 func Mul64(x, y uint64) (hi, lo uint64) {
 494         // amd64:"MULQ"
 495         // arm64:"UMULH","MUL"
 496         // ppc64:"MULHDU","MULLD"
 497         // ppc64le:"MULHDU","MULLD"
 498         return bits.Mul64(x, y)
 499 }
 500
 501 // --------------- //
 502 //    bits.Div*    //
 503 // --------------- //
 504
 505 func Div(hi, lo, x uint) (q, r uint) {
 506         // amd64:"DIVQ"
 507         return bits.Div(hi, lo, x)
 508 }
 509
 510 func Div32(hi, lo, x uint32) (q, r uint32) {
 511         // arm64:"ORR","UDIV","MSUB",-"UREM"
 512         return bits.Div32(hi, lo, x)
 513 }
 514
 515 func Div64(hi, lo, x uint64) (q, r uint64) {
 516         // amd64:"DIVQ"
 517         return bits.Div64(hi, lo, x)
 518 }