include/asm-generic/xor.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * include/asm-generic/xor.h
   4  *
   5  * Generic optimized RAID-5 checksumming functions.
   6  */
   7
   8 #include <linux/prefetch.h>
   9
  10 static void
  11 xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
  12             const unsigned long * __restrict p2)
  13 {
  14         long lines = bytes / (sizeof (long)) / 8;
  15
  16         do {
  17                 p1[0] ^= p2[0];
  18                 p1[1] ^= p2[1];
  19                 p1[2] ^= p2[2];
  20                 p1[3] ^= p2[3];
  21                 p1[4] ^= p2[4];
  22                 p1[5] ^= p2[5];
  23                 p1[6] ^= p2[6];
  24                 p1[7] ^= p2[7];
  25                 p1 += 8;
  26                 p2 += 8;
  27         } while (--lines > 0);
  28 }
  29
  30 static void
  31 xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
  32             const unsigned long * __restrict p2,
  33             const unsigned long * __restrict p3)
  34 {
  35         long lines = bytes / (sizeof (long)) / 8;
  36
  37         do {
  38                 p1[0] ^= p2[0] ^ p3[0];
  39                 p1[1] ^= p2[1] ^ p3[1];
  40                 p1[2] ^= p2[2] ^ p3[2];
  41                 p1[3] ^= p2[3] ^ p3[3];
  42                 p1[4] ^= p2[4] ^ p3[4];
  43                 p1[5] ^= p2[5] ^ p3[5];
  44                 p1[6] ^= p2[6] ^ p3[6];
  45                 p1[7] ^= p2[7] ^ p3[7];
  46                 p1 += 8;
  47                 p2 += 8;
  48                 p3 += 8;
  49         } while (--lines > 0);
  50 }
  51
  52 static void
  53 xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
  54             const unsigned long * __restrict p2,
  55             const unsigned long * __restrict p3,
  56             const unsigned long * __restrict p4)
  57 {
  58         long lines = bytes / (sizeof (long)) / 8;
  59
  60         do {
  61                 p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
  62                 p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
  63                 p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
  64                 p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
  65                 p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
  66                 p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
  67                 p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
  68                 p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
  69                 p1 += 8;
  70                 p2 += 8;
  71                 p3 += 8;
  72                 p4 += 8;
  73         } while (--lines > 0);
  74 }
  75
  76 static void
  77 xor_8regs_5(unsigned long bytes, unsigned long * __restrict p1,
  78             const unsigned long * __restrict p2,
  79             const unsigned long * __restrict p3,
  80             const unsigned long * __restrict p4,
  81             const unsigned long * __restrict p5)
  82 {
  83         long lines = bytes / (sizeof (long)) / 8;
  84
  85         do {
  86                 p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
  87                 p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
  88                 p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
  89                 p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
  90                 p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
  91                 p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
  92                 p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
  93                 p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
  94                 p1 += 8;
  95                 p2 += 8;
  96                 p3 += 8;
  97                 p4 += 8;
  98                 p5 += 8;
  99         } while (--lines > 0);
 100 }
 101
 102 static void
 103 xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
 104              const unsigned long * __restrict p2)
 105 {
 106         long lines = bytes / (sizeof (long)) / 8;
 107
 108         do {
 109                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 110                 d0 = p1[0];     /* Pull the stuff into registers        */
 111                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 112                 d2 = p1[2];
 113                 d3 = p1[3];
 114                 d4 = p1[4];
 115                 d5 = p1[5];
 116                 d6 = p1[6];
 117                 d7 = p1[7];
 118                 d0 ^= p2[0];
 119                 d1 ^= p2[1];
 120                 d2 ^= p2[2];
 121                 d3 ^= p2[3];
 122                 d4 ^= p2[4];
 123                 d5 ^= p2[5];
 124                 d6 ^= p2[6];
 125                 d7 ^= p2[7];
 126                 p1[0] = d0;     /* Store the result (in bursts)         */
 127                 p1[1] = d1;
 128                 p1[2] = d2;
 129                 p1[3] = d3;
 130                 p1[4] = d4;
 131                 p1[5] = d5;
 132                 p1[6] = d6;
 133                 p1[7] = d7;
 134                 p1 += 8;
 135                 p2 += 8;
 136         } while (--lines > 0);
 137 }
 138
 139 static void
 140 xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
 141              const unsigned long * __restrict p2,
 142              const unsigned long * __restrict p3)
 143 {
 144         long lines = bytes / (sizeof (long)) / 8;
 145
 146         do {
 147                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 148                 d0 = p1[0];     /* Pull the stuff into registers        */
 149                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 150                 d2 = p1[2];
 151                 d3 = p1[3];
 152                 d4 = p1[4];
 153                 d5 = p1[5];
 154                 d6 = p1[6];
 155                 d7 = p1[7];
 156                 d0 ^= p2[0];
 157                 d1 ^= p2[1];
 158                 d2 ^= p2[2];
 159                 d3 ^= p2[3];
 160                 d4 ^= p2[4];
 161                 d5 ^= p2[5];
 162                 d6 ^= p2[6];
 163                 d7 ^= p2[7];
 164                 d0 ^= p3[0];
 165                 d1 ^= p3[1];
 166                 d2 ^= p3[2];
 167                 d3 ^= p3[3];
 168                 d4 ^= p3[4];
 169                 d5 ^= p3[5];
 170                 d6 ^= p3[6];
 171                 d7 ^= p3[7];
 172                 p1[0] = d0;     /* Store the result (in bursts)         */
 173                 p1[1] = d1;
 174                 p1[2] = d2;
 175                 p1[3] = d3;
 176                 p1[4] = d4;
 177                 p1[5] = d5;
 178                 p1[6] = d6;
 179                 p1[7] = d7;
 180                 p1 += 8;
 181                 p2 += 8;
 182                 p3 += 8;
 183         } while (--lines > 0);
 184 }
 185
 186 static void
 187 xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
 188              const unsigned long * __restrict p2,
 189              const unsigned long * __restrict p3,
 190              const unsigned long * __restrict p4)
 191 {
 192         long lines = bytes / (sizeof (long)) / 8;
 193
 194         do {
 195                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 196                 d0 = p1[0];     /* Pull the stuff into registers        */
 197                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 198                 d2 = p1[2];
 199                 d3 = p1[3];
 200                 d4 = p1[4];
 201                 d5 = p1[5];
 202                 d6 = p1[6];
 203                 d7 = p1[7];
 204                 d0 ^= p2[0];
 205                 d1 ^= p2[1];
 206                 d2 ^= p2[2];
 207                 d3 ^= p2[3];
 208                 d4 ^= p2[4];
 209                 d5 ^= p2[5];
 210                 d6 ^= p2[6];
 211                 d7 ^= p2[7];
 212                 d0 ^= p3[0];
 213                 d1 ^= p3[1];
 214                 d2 ^= p3[2];
 215                 d3 ^= p3[3];
 216                 d4 ^= p3[4];
 217                 d5 ^= p3[5];
 218                 d6 ^= p3[6];
 219                 d7 ^= p3[7];
 220                 d0 ^= p4[0];
 221                 d1 ^= p4[1];
 222                 d2 ^= p4[2];
 223                 d3 ^= p4[3];
 224                 d4 ^= p4[4];
 225                 d5 ^= p4[5];
 226                 d6 ^= p4[6];
 227                 d7 ^= p4[7];
 228                 p1[0] = d0;     /* Store the result (in bursts)         */
 229                 p1[1] = d1;
 230                 p1[2] = d2;
 231                 p1[3] = d3;
 232                 p1[4] = d4;
 233                 p1[5] = d5;
 234                 p1[6] = d6;
 235                 p1[7] = d7;
 236                 p1 += 8;
 237                 p2 += 8;
 238                 p3 += 8;
 239                 p4 += 8;
 240         } while (--lines > 0);
 241 }
 242
 243 static void
 244 xor_32regs_5(unsigned long bytes, unsigned long * __restrict p1,
 245              const unsigned long * __restrict p2,
 246              const unsigned long * __restrict p3,
 247              const unsigned long * __restrict p4,
 248              const unsigned long * __restrict p5)
 249 {
 250         long lines = bytes / (sizeof (long)) / 8;
 251
 252         do {
 253                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 254                 d0 = p1[0];     /* Pull the stuff into registers        */
 255                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 256                 d2 = p1[2];
 257                 d3 = p1[3];
 258                 d4 = p1[4];
 259                 d5 = p1[5];
 260                 d6 = p1[6];
 261                 d7 = p1[7];
 262                 d0 ^= p2[0];
 263                 d1 ^= p2[1];
 264                 d2 ^= p2[2];
 265                 d3 ^= p2[3];
 266                 d4 ^= p2[4];
 267                 d5 ^= p2[5];
 268                 d6 ^= p2[6];
 269                 d7 ^= p2[7];
 270                 d0 ^= p3[0];
 271                 d1 ^= p3[1];
 272                 d2 ^= p3[2];
 273                 d3 ^= p3[3];
 274                 d4 ^= p3[4];
 275                 d5 ^= p3[5];
 276                 d6 ^= p3[6];
 277                 d7 ^= p3[7];
 278                 d0 ^= p4[0];
 279                 d1 ^= p4[1];
 280                 d2 ^= p4[2];
 281                 d3 ^= p4[3];
 282                 d4 ^= p4[4];
 283                 d5 ^= p4[5];
 284                 d6 ^= p4[6];
 285                 d7 ^= p4[7];
 286                 d0 ^= p5[0];
 287                 d1 ^= p5[1];
 288                 d2 ^= p5[2];
 289                 d3 ^= p5[3];
 290                 d4 ^= p5[4];
 291                 d5 ^= p5[5];
 292                 d6 ^= p5[6];
 293                 d7 ^= p5[7];
 294                 p1[0] = d0;     /* Store the result (in bursts)         */
 295                 p1[1] = d1;
 296                 p1[2] = d2;
 297                 p1[3] = d3;
 298                 p1[4] = d4;
 299                 p1[5] = d5;
 300                 p1[6] = d6;
 301                 p1[7] = d7;
 302                 p1 += 8;
 303                 p2 += 8;
 304                 p3 += 8;
 305                 p4 += 8;
 306                 p5 += 8;
 307         } while (--lines > 0);
 308 }
 309
 310 static void
 311 xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
 312               const unsigned long * __restrict p2)
 313 {
 314         long lines = bytes / (sizeof (long)) / 8 - 1;
 315         prefetchw(p1);
 316         prefetch(p2);
 317
 318         do {
 319                 prefetchw(p1+8);
 320                 prefetch(p2+8);
 321  once_more:
 322                 p1[0] ^= p2[0];
 323                 p1[1] ^= p2[1];
 324                 p1[2] ^= p2[2];
 325                 p1[3] ^= p2[3];
 326                 p1[4] ^= p2[4];
 327                 p1[5] ^= p2[5];
 328                 p1[6] ^= p2[6];
 329                 p1[7] ^= p2[7];
 330                 p1 += 8;
 331                 p2 += 8;
 332         } while (--lines > 0);
 333         if (lines == 0)
 334                 goto once_more;
 335 }
 336
 337 static void
 338 xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
 339               const unsigned long * __restrict p2,
 340               const unsigned long * __restrict p3)
 341 {
 342         long lines = bytes / (sizeof (long)) / 8 - 1;
 343         prefetchw(p1);
 344         prefetch(p2);
 345         prefetch(p3);
 346
 347         do {
 348                 prefetchw(p1+8);
 349                 prefetch(p2+8);
 350                 prefetch(p3+8);
 351  once_more:
 352                 p1[0] ^= p2[0] ^ p3[0];
 353                 p1[1] ^= p2[1] ^ p3[1];
 354                 p1[2] ^= p2[2] ^ p3[2];
 355                 p1[3] ^= p2[3] ^ p3[3];
 356                 p1[4] ^= p2[4] ^ p3[4];
 357                 p1[5] ^= p2[5] ^ p3[5];
 358                 p1[6] ^= p2[6] ^ p3[6];
 359                 p1[7] ^= p2[7] ^ p3[7];
 360                 p1 += 8;
 361                 p2 += 8;
 362                 p3 += 8;
 363         } while (--lines > 0);
 364         if (lines == 0)
 365                 goto once_more;
 366 }
 367
 368 static void
 369 xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
 370               const unsigned long * __restrict p2,
 371               const unsigned long * __restrict p3,
 372               const unsigned long * __restrict p4)
 373 {
 374         long lines = bytes / (sizeof (long)) / 8 - 1;
 375
 376         prefetchw(p1);
 377         prefetch(p2);
 378         prefetch(p3);
 379         prefetch(p4);
 380
 381         do {
 382                 prefetchw(p1+8);
 383                 prefetch(p2+8);
 384                 prefetch(p3+8);
 385                 prefetch(p4+8);
 386  once_more:
 387                 p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
 388                 p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
 389                 p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
 390                 p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
 391                 p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
 392                 p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
 393                 p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
 394                 p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
 395                 p1 += 8;
 396                 p2 += 8;
 397                 p3 += 8;
 398                 p4 += 8;
 399         } while (--lines > 0);
 400         if (lines == 0)
 401                 goto once_more;
 402 }
 403
 404 static void
 405 xor_8regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
 406               const unsigned long * __restrict p2,
 407               const unsigned long * __restrict p3,
 408               const unsigned long * __restrict p4,
 409               const unsigned long * __restrict p5)
 410 {
 411         long lines = bytes / (sizeof (long)) / 8 - 1;
 412
 413         prefetchw(p1);
 414         prefetch(p2);
 415         prefetch(p3);
 416         prefetch(p4);
 417         prefetch(p5);
 418
 419         do {
 420                 prefetchw(p1+8);
 421                 prefetch(p2+8);
 422                 prefetch(p3+8);
 423                 prefetch(p4+8);
 424                 prefetch(p5+8);
 425  once_more:
 426                 p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
 427                 p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
 428                 p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
 429                 p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
 430                 p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
 431                 p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
 432                 p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
 433                 p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
 434                 p1 += 8;
 435                 p2 += 8;
 436                 p3 += 8;
 437                 p4 += 8;
 438                 p5 += 8;
 439         } while (--lines > 0);
 440         if (lines == 0)
 441                 goto once_more;
 442 }
 443
 444 static void
 445 xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
 446                const unsigned long * __restrict p2)
 447 {
 448         long lines = bytes / (sizeof (long)) / 8 - 1;
 449
 450         prefetchw(p1);
 451         prefetch(p2);
 452
 453         do {
 454                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 455
 456                 prefetchw(p1+8);
 457                 prefetch(p2+8);
 458  once_more:
 459                 d0 = p1[0];     /* Pull the stuff into registers        */
 460                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 461                 d2 = p1[2];
 462                 d3 = p1[3];
 463                 d4 = p1[4];
 464                 d5 = p1[5];
 465                 d6 = p1[6];
 466                 d7 = p1[7];
 467                 d0 ^= p2[0];
 468                 d1 ^= p2[1];
 469                 d2 ^= p2[2];
 470                 d3 ^= p2[3];
 471                 d4 ^= p2[4];
 472                 d5 ^= p2[5];
 473                 d6 ^= p2[6];
 474                 d7 ^= p2[7];
 475                 p1[0] = d0;     /* Store the result (in bursts)         */
 476                 p1[1] = d1;
 477                 p1[2] = d2;
 478                 p1[3] = d3;
 479                 p1[4] = d4;
 480                 p1[5] = d5;
 481                 p1[6] = d6;
 482                 p1[7] = d7;
 483                 p1 += 8;
 484                 p2 += 8;
 485         } while (--lines > 0);
 486         if (lines == 0)
 487                 goto once_more;
 488 }
 489
 490 static void
 491 xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
 492                const unsigned long * __restrict p2,
 493                const unsigned long * __restrict p3)
 494 {
 495         long lines = bytes / (sizeof (long)) / 8 - 1;
 496
 497         prefetchw(p1);
 498         prefetch(p2);
 499         prefetch(p3);
 500
 501         do {
 502                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 503
 504                 prefetchw(p1+8);
 505                 prefetch(p2+8);
 506                 prefetch(p3+8);
 507  once_more:
 508                 d0 = p1[0];     /* Pull the stuff into registers        */
 509                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 510                 d2 = p1[2];
 511                 d3 = p1[3];
 512                 d4 = p1[4];
 513                 d5 = p1[5];
 514                 d6 = p1[6];
 515                 d7 = p1[7];
 516                 d0 ^= p2[0];
 517                 d1 ^= p2[1];
 518                 d2 ^= p2[2];
 519                 d3 ^= p2[3];
 520                 d4 ^= p2[4];
 521                 d5 ^= p2[5];
 522                 d6 ^= p2[6];
 523                 d7 ^= p2[7];
 524                 d0 ^= p3[0];
 525                 d1 ^= p3[1];
 526                 d2 ^= p3[2];
 527                 d3 ^= p3[3];
 528                 d4 ^= p3[4];
 529                 d5 ^= p3[5];
 530                 d6 ^= p3[6];
 531                 d7 ^= p3[7];
 532                 p1[0] = d0;     /* Store the result (in bursts)         */
 533                 p1[1] = d1;
 534                 p1[2] = d2;
 535                 p1[3] = d3;
 536                 p1[4] = d4;
 537                 p1[5] = d5;
 538                 p1[6] = d6;
 539                 p1[7] = d7;
 540                 p1 += 8;
 541                 p2 += 8;
 542                 p3 += 8;
 543         } while (--lines > 0);
 544         if (lines == 0)
 545                 goto once_more;
 546 }
 547
 548 static void
 549 xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
 550                const unsigned long * __restrict p2,
 551                const unsigned long * __restrict p3,
 552                const unsigned long * __restrict p4)
 553 {
 554         long lines = bytes / (sizeof (long)) / 8 - 1;
 555
 556         prefetchw(p1);
 557         prefetch(p2);
 558         prefetch(p3);
 559         prefetch(p4);
 560
 561         do {
 562                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 563
 564                 prefetchw(p1+8);
 565                 prefetch(p2+8);
 566                 prefetch(p3+8);
 567                 prefetch(p4+8);
 568  once_more:
 569                 d0 = p1[0];     /* Pull the stuff into registers        */
 570                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 571                 d2 = p1[2];
 572                 d3 = p1[3];
 573                 d4 = p1[4];
 574                 d5 = p1[5];
 575                 d6 = p1[6];
 576                 d7 = p1[7];
 577                 d0 ^= p2[0];
 578                 d1 ^= p2[1];
 579                 d2 ^= p2[2];
 580                 d3 ^= p2[3];
 581                 d4 ^= p2[4];
 582                 d5 ^= p2[5];
 583                 d6 ^= p2[6];
 584                 d7 ^= p2[7];
 585                 d0 ^= p3[0];
 586                 d1 ^= p3[1];
 587                 d2 ^= p3[2];
 588                 d3 ^= p3[3];
 589                 d4 ^= p3[4];
 590                 d5 ^= p3[5];
 591                 d6 ^= p3[6];
 592                 d7 ^= p3[7];
 593                 d0 ^= p4[0];
 594                 d1 ^= p4[1];
 595                 d2 ^= p4[2];
 596                 d3 ^= p4[3];
 597                 d4 ^= p4[4];
 598                 d5 ^= p4[5];
 599                 d6 ^= p4[6];
 600                 d7 ^= p4[7];
 601                 p1[0] = d0;     /* Store the result (in bursts)         */
 602                 p1[1] = d1;
 603                 p1[2] = d2;
 604                 p1[3] = d3;
 605                 p1[4] = d4;
 606                 p1[5] = d5;
 607                 p1[6] = d6;
 608                 p1[7] = d7;
 609                 p1 += 8;
 610                 p2 += 8;
 611                 p3 += 8;
 612                 p4 += 8;
 613         } while (--lines > 0);
 614         if (lines == 0)
 615                 goto once_more;
 616 }
 617
 618 static void
 619 xor_32regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
 620                const unsigned long * __restrict p2,
 621                const unsigned long * __restrict p3,
 622                const unsigned long * __restrict p4,
 623                const unsigned long * __restrict p5)
 624 {
 625         long lines = bytes / (sizeof (long)) / 8 - 1;
 626
 627         prefetchw(p1);
 628         prefetch(p2);
 629         prefetch(p3);
 630         prefetch(p4);
 631         prefetch(p5);
 632
 633         do {
 634                 register long d0, d1, d2, d3, d4, d5, d6, d7;
 635
 636                 prefetchw(p1+8);
 637                 prefetch(p2+8);
 638                 prefetch(p3+8);
 639                 prefetch(p4+8);
 640                 prefetch(p5+8);
 641  once_more:
 642                 d0 = p1[0];     /* Pull the stuff into registers        */
 643                 d1 = p1[1];     /*  ... in bursts, if possible.         */
 644                 d2 = p1[2];
 645                 d3 = p1[3];
 646                 d4 = p1[4];
 647                 d5 = p1[5];
 648                 d6 = p1[6];
 649                 d7 = p1[7];
 650                 d0 ^= p2[0];
 651                 d1 ^= p2[1];
 652                 d2 ^= p2[2];
 653                 d3 ^= p2[3];
 654                 d4 ^= p2[4];
 655                 d5 ^= p2[5];
 656                 d6 ^= p2[6];
 657                 d7 ^= p2[7];
 658                 d0 ^= p3[0];
 659                 d1 ^= p3[1];
 660                 d2 ^= p3[2];
 661                 d3 ^= p3[3];
 662                 d4 ^= p3[4];
 663                 d5 ^= p3[5];
 664                 d6 ^= p3[6];
 665                 d7 ^= p3[7];
 666                 d0 ^= p4[0];
 667                 d1 ^= p4[1];
 668                 d2 ^= p4[2];
 669                 d3 ^= p4[3];
 670                 d4 ^= p4[4];
 671                 d5 ^= p4[5];
 672                 d6 ^= p4[6];
 673                 d7 ^= p4[7];
 674                 d0 ^= p5[0];
 675                 d1 ^= p5[1];
 676                 d2 ^= p5[2];
 677                 d3 ^= p5[3];
 678                 d4 ^= p5[4];
 679                 d5 ^= p5[5];
 680                 d6 ^= p5[6];
 681                 d7 ^= p5[7];
 682                 p1[0] = d0;     /* Store the result (in bursts)         */
 683                 p1[1] = d1;
 684                 p1[2] = d2;
 685                 p1[3] = d3;
 686                 p1[4] = d4;
 687                 p1[5] = d5;
 688                 p1[6] = d6;
 689                 p1[7] = d7;
 690                 p1 += 8;
 691                 p2 += 8;
 692                 p3 += 8;
 693                 p4 += 8;
 694                 p5 += 8;
 695         } while (--lines > 0);
 696         if (lines == 0)
 697                 goto once_more;
 698 }
 699
 700 static struct xor_block_template xor_block_8regs = {
 701         .name = "8regs",
 702         .do_2 = xor_8regs_2,
 703         .do_3 = xor_8regs_3,
 704         .do_4 = xor_8regs_4,
 705         .do_5 = xor_8regs_5,
 706 };
 707
 708 static struct xor_block_template xor_block_32regs = {
 709         .name = "32regs",
 710         .do_2 = xor_32regs_2,
 711         .do_3 = xor_32regs_3,
 712         .do_4 = xor_32regs_4,
 713         .do_5 = xor_32regs_5,
 714 };
 715
 716 static struct xor_block_template xor_block_8regs_p __maybe_unused = {
 717         .name = "8regs_prefetch",
 718         .do_2 = xor_8regs_p_2,
 719         .do_3 = xor_8regs_p_3,
 720         .do_4 = xor_8regs_p_4,
 721         .do_5 = xor_8regs_p_5,
 722 };
 723
 724 static struct xor_block_template xor_block_32regs_p __maybe_unused = {
 725         .name = "32regs_prefetch",
 726         .do_2 = xor_32regs_p_2,
 727         .do_3 = xor_32regs_p_3,
 728         .do_4 = xor_32regs_p_4,
 729         .do_5 = xor_32regs_p_5,
 730 };
 731
 732 #define XOR_TRY_TEMPLATES                       \
 733         do {                                    \
 734                 xor_speed(&xor_block_8regs);    \
 735                 xor_speed(&xor_block_8regs_p);  \
 736                 xor_speed(&xor_block_32regs);   \
 737                 xor_speed(&xor_block_32regs_p); \
 738         } while (0)