1 #ifndef _ASM_X86_XOR_32_H 2 #define _ASM_X86_XOR_32_H 3 4 /* 5 * Optimized RAID-5 checksumming functions for MMX. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * You should have received a copy of the GNU General Public License 13 * (for example /usr/src/linux/COPYING); if not, write to the Free 14 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 15 */ 16 17 /* 18 * High-speed RAID5 checksumming functions utilizing MMX instructions. 19 * Copyright (C) 1998 Ingo Molnar. 20 */ 21 22 #define LD(x, y) " movq 8*("#x")(%1), %%mm"#y" ;\n" 23 #define ST(x, y) " movq %%mm"#y", 8*("#x")(%1) ;\n" 24 #define XO1(x, y) " pxor 8*("#x")(%2), %%mm"#y" ;\n" 25 #define XO2(x, y) " pxor 8*("#x")(%3), %%mm"#y" ;\n" 26 #define XO3(x, y) " pxor 8*("#x")(%4), %%mm"#y" ;\n" 27 #define XO4(x, y) " pxor 8*("#x")(%5), %%mm"#y" ;\n" 28 29 #include <asm/i387.h> 30 31 static void 32 xor_pII_mmx_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) 33 { 34 unsigned long lines = bytes >> 7; 35 36 kernel_fpu_begin(); 37 38 asm volatile( 39 #undef BLOCK 40 #define BLOCK(i) \ 41 LD(i, 0) \ 42 LD(i + 1, 1) \ 43 LD(i + 2, 2) \ 44 LD(i + 3, 3) \ 45 XO1(i, 0) \ 46 ST(i, 0) \ 47 XO1(i+1, 1) \ 48 ST(i+1, 1) \ 49 XO1(i + 2, 2) \ 50 ST(i + 2, 2) \ 51 XO1(i + 3, 3) \ 52 ST(i + 3, 3) 53 54 " .align 32 ;\n" 55 " 1: ;\n" 56 57 BLOCK(0) 58 BLOCK(4) 59 BLOCK(8) 60 BLOCK(12) 61 62 " addl $128, %1 ;\n" 63 " addl $128, %2 ;\n" 64 " decl %0 ;\n" 65 " jnz 1b ;\n" 66 : "+r" (lines), 67 "+r" (p1), "+r" (p2) 68 : 69 : "memory"); 70 71 kernel_fpu_end(); 72 } 73 74 static void 75 xor_pII_mmx_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, 76 unsigned long *p3) 77 { 78 unsigned long lines = bytes >> 7; 79 80 kernel_fpu_begin(); 81 82 asm volatile( 83 #undef BLOCK 84 #define BLOCK(i) \ 85 LD(i, 0) \ 86 LD(i + 1, 1) \ 87 LD(i + 2, 2) \ 88 LD(i + 3, 3) \ 89 XO1(i, 0) \ 90 XO1(i + 1, 1) \ 91 XO1(i + 2, 2) \ 92 XO1(i + 3, 3) \ 93 XO2(i, 0) \ 94 ST(i, 0) \ 95 XO2(i + 1, 1) \ 96 ST(i + 1, 1) \ 97 XO2(i + 2, 2) \ 98 ST(i + 2, 2) \ 99 XO2(i + 3, 3) \ 100 ST(i + 3, 3) 101 102 " .align 32 ;\n" 103 " 1: ;\n" 104 105 BLOCK(0) 106 BLOCK(4) 107 BLOCK(8) 108 BLOCK(12) 109 110 " addl $128, %1 ;\n" 111 " addl $128, %2 ;\n" 112 " addl $128, %3 ;\n" 113 " decl %0 ;\n" 114 " jnz 1b ;\n" 115 : "+r" (lines), 116 "+r" (p1), "+r" (p2), "+r" (p3) 117 : 118 : "memory"); 119 120 kernel_fpu_end(); 121 } 122 123 static void 124 xor_pII_mmx_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, 125 unsigned long *p3, unsigned long *p4) 126 { 127 unsigned long lines = bytes >> 7; 128 129 kernel_fpu_begin(); 130 131 asm volatile( 132 #undef BLOCK 133 #define BLOCK(i) \ 134 LD(i, 0) \ 135 LD(i + 1, 1) \ 136 LD(i + 2, 2) \ 137 LD(i + 3, 3) \ 138 XO1(i, 0) \ 139 XO1(i + 1, 1) \ 140 XO1(i + 2, 2) \ 141 XO1(i + 3, 3) \ 142 XO2(i, 0) \ 143 XO2(i + 1, 1) \ 144 XO2(i + 2, 2) \ 145 XO2(i + 3, 3) \ 146 XO3(i, 0) \ 147 ST(i, 0) \ 148 XO3(i + 1, 1) \ 149 ST(i + 1, 1) \ 150 XO3(i + 2, 2) \ 151 ST(i + 2, 2) \ 152 XO3(i + 3, 3) \ 153 ST(i + 3, 3) 154 155 " .align 32 ;\n" 156 " 1: ;\n" 157 158 BLOCK(0) 159 BLOCK(4) 160 BLOCK(8) 161 BLOCK(12) 162 163 " addl $128, %1 ;\n" 164 " addl $128, %2 ;\n" 165 " addl $128, %3 ;\n" 166 " addl $128, %4 ;\n" 167 " decl %0 ;\n" 168 " jnz 1b ;\n" 169 : "+r" (lines), 170 "+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4) 171 : 172 : "memory"); 173 174 kernel_fpu_end(); 175 } 176 177 178 static void 179 xor_pII_mmx_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, 180 unsigned long *p3, unsigned long *p4, unsigned long *p5) 181 { 182 unsigned long lines = bytes >> 7; 183 184 kernel_fpu_begin(); 185 186 /* Make sure GCC forgets anything it knows about p4 or p5, 187 such that it won't pass to the asm volatile below a 188 register that is shared with any other variable. That's 189 because we modify p4 and p5 there, but we can't mark them 190 as read/write, otherwise we'd overflow the 10-asm-operands 191 limit of GCC < 3.1. */ 192 asm("" : "+r" (p4), "+r" (p5)); 193 194 asm volatile( 195 #undef BLOCK 196 #define BLOCK(i) \ 197 LD(i, 0) \ 198 LD(i + 1, 1) \ 199 LD(i + 2, 2) \ 200 LD(i + 3, 3) \ 201 XO1(i, 0) \ 202 XO1(i + 1, 1) \ 203 XO1(i + 2, 2) \ 204 XO1(i + 3, 3) \ 205 XO2(i, 0) \ 206 XO2(i + 1, 1) \ 207 XO2(i + 2, 2) \ 208 XO2(i + 3, 3) \ 209 XO3(i, 0) \ 210 XO3(i + 1, 1) \ 211 XO3(i + 2, 2) \ 212 XO3(i + 3, 3) \ 213 XO4(i, 0) \ 214 ST(i, 0) \ 215 XO4(i + 1, 1) \ 216 ST(i + 1, 1) \ 217 XO4(i + 2, 2) \ 218 ST(i + 2, 2) \ 219 XO4(i + 3, 3) \ 220 ST(i + 3, 3) 221 222 " .align 32 ;\n" 223 " 1: ;\n" 224 225 BLOCK(0) 226 BLOCK(4) 227 BLOCK(8) 228 BLOCK(12) 229 230 " addl $128, %1 ;\n" 231 " addl $128, %2 ;\n" 232 " addl $128, %3 ;\n" 233 " addl $128, %4 ;\n" 234 " addl $128, %5 ;\n" 235 " decl %0 ;\n" 236 " jnz 1b ;\n" 237 : "+r" (lines), 238 "+r" (p1), "+r" (p2), "+r" (p3) 239 : "r" (p4), "r" (p5) 240 : "memory"); 241 242 /* p4 and p5 were modified, and now the variables are dead. 243 Clobber them just to be sure nobody does something stupid 244 like assuming they have some legal value. */ 245 asm("" : "=r" (p4), "=r" (p5)); 246 247 kernel_fpu_end(); 248 } 249 250 #undef LD 251 #undef XO1 252 #undef XO2 253 #undef XO3 254 #undef XO4 255 #undef ST 256 #undef BLOCK 257 258 static void 259 xor_p5_mmx_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) 260 { 261 unsigned long lines = bytes >> 6; 262 263 kernel_fpu_begin(); 264 265 asm volatile( 266 " .align 32 ;\n" 267 " 1: ;\n" 268 " movq (%1), %%mm0 ;\n" 269 " movq 8(%1), %%mm1 ;\n" 270 " pxor (%2), %%mm0 ;\n" 271 " movq 16(%1), %%mm2 ;\n" 272 " movq %%mm0, (%1) ;\n" 273 " pxor 8(%2), %%mm1 ;\n" 274 " movq 24(%1), %%mm3 ;\n" 275 " movq %%mm1, 8(%1) ;\n" 276 " pxor 16(%2), %%mm2 ;\n" 277 " movq 32(%1), %%mm4 ;\n" 278 " movq %%mm2, 16(%1) ;\n" 279 " pxor 24(%2), %%mm3 ;\n" 280 " movq 40(%1), %%mm5 ;\n" 281 " movq %%mm3, 24(%1) ;\n" 282 " pxor 32(%2), %%mm4 ;\n" 283 " movq 48(%1), %%mm6 ;\n" 284 " movq %%mm4, 32(%1) ;\n" 285 " pxor 40(%2), %%mm5 ;\n" 286 " movq 56(%1), %%mm7 ;\n" 287 " movq %%mm5, 40(%1) ;\n" 288 " pxor 48(%2), %%mm6 ;\n" 289 " pxor 56(%2), %%mm7 ;\n" 290 " movq %%mm6, 48(%1) ;\n" 291 " movq %%mm7, 56(%1) ;\n" 292 293 " addl $64, %1 ;\n" 294 " addl $64, %2 ;\n" 295 " decl %0 ;\n" 296 " jnz 1b ;\n" 297 : "+r" (lines), 298 "+r" (p1), "+r" (p2) 299 : 300 : "memory"); 301 302 kernel_fpu_end(); 303 } 304 305 static void 306 xor_p5_mmx_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, 307 unsigned long *p3) 308 { 309 unsigned long lines = bytes >> 6; 310 311 kernel_fpu_begin(); 312 313 asm volatile( 314 " .align 32,0x90 ;\n" 315 " 1: ;\n" 316 " movq (%1), %%mm0 ;\n" 317 " movq 8(%1), %%mm1 ;\n" 318 " pxor (%2), %%mm0 ;\n" 319 " movq 16(%1), %%mm2 ;\n" 320 " pxor 8(%2), %%mm1 ;\n" 321 " pxor (%3), %%mm0 ;\n" 322 " pxor 16(%2), %%mm2 ;\n" 323 " movq %%mm0, (%1) ;\n" 324 " pxor 8(%3), %%mm1 ;\n" 325 " pxor 16(%3), %%mm2 ;\n" 326 " movq 24(%1), %%mm3 ;\n" 327 " movq %%mm1, 8(%1) ;\n" 328 " movq 32(%1), %%mm4 ;\n" 329 " movq 40(%1), %%mm5 ;\n" 330 " pxor 24(%2), %%mm3 ;\n" 331 " movq %%mm2, 16(%1) ;\n" 332 " pxor 32(%2), %%mm4 ;\n" 333 " pxor 24(%3), %%mm3 ;\n" 334 " pxor 40(%2), %%mm5 ;\n" 335 " movq %%mm3, 24(%1) ;\n" 336 " pxor 32(%3), %%mm4 ;\n" 337 " pxor 40(%3), %%mm5 ;\n" 338 " movq 48(%1), %%mm6 ;\n" 339 " movq %%mm4, 32(%1) ;\n" 340 " movq 56(%1), %%mm7 ;\n" 341 " pxor 48(%2), %%mm6 ;\n" 342 " movq %%mm5, 40(%1) ;\n" 343 " pxor 56(%2), %%mm7 ;\n" 344 " pxor 48(%3), %%mm6 ;\n" 345 " pxor 56(%3), %%mm7 ;\n" 346 " movq %%mm6, 48(%1) ;\n" 347 " movq %%mm7, 56(%1) ;\n" 348 349 " addl $64, %1 ;\n" 350 " addl $64, %2 ;\n" 351 " addl $64, %3 ;\n" 352 " decl %0 ;\n" 353 " jnz 1b ;\n" 354 : "+r" (lines), 355 "+r" (p1), "+r" (p2), "+r" (p3) 356 : 357 : "memory" ); 358 359 kernel_fpu_end(); 360 } 361 362 static void 363 xor_p5_mmx_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, 364 unsigned long *p3, unsigned long *p4) 365 { 366 unsigned long lines = bytes >> 6; 367 368 kernel_fpu_begin(); 369 370 asm volatile( 371 " .align 32,0x90 ;\n" 372 " 1: ;\n" 373 " movq (%1), %%mm0 ;\n" 374 " movq 8(%1), %%mm1 ;\n" 375 " pxor (%2), %%mm0 ;\n" 376 " movq 16(%1), %%mm2 ;\n" 377 " pxor 8(%2), %%mm1 ;\n" 378 " pxor (%3), %%mm0 ;\n" 379 " pxor 16(%2), %%mm2 ;\n" 380 " pxor 8(%3), %%mm1 ;\n" 381 " pxor (%4), %%mm0 ;\n" 382 " movq 24(%1), %%mm3 ;\n" 383 " pxor 16(%3), %%mm2 ;\n" 384 " pxor 8(%4), %%mm1 ;\n" 385 " movq %%mm0, (%1) ;\n" 386 " movq 32(%1), %%mm4 ;\n" 387 " pxor 24(%2), %%mm3 ;\n" 388 " pxor 16(%4), %%mm2 ;\n" 389 " movq %%mm1, 8(%1) ;\n" 390 " movq 40(%1), %%mm5 ;\n" 391 " pxor 32(%2), %%mm4 ;\n" 392 " pxor 24(%3), %%mm3 ;\n" 393 " movq %%mm2, 16(%1) ;\n" 394 " pxor 40(%2), %%mm5 ;\n" 395 " pxor 32(%3), %%mm4 ;\n" 396 " pxor 24(%4), %%mm3 ;\n" 397 " movq %%mm3, 24(%1) ;\n" 398 " movq 56(%1), %%mm7 ;\n" 399 " movq 48(%1), %%mm6 ;\n" 400 " pxor 40(%3), %%mm5 ;\n" 401 " pxor 32(%4), %%mm4 ;\n" 402 " pxor 48(%2), %%mm6 ;\n" 403 " movq %%mm4, 32(%1) ;\n" 404 " pxor 56(%2), %%mm7 ;\n" 405 " pxor 40(%4), %%mm5 ;\n" 406 " pxor 48(%3), %%mm6 ;\n" 407 " pxor 56(%3), %%mm7 ;\n" 408 " movq %%mm5, 40(%1) ;\n" 409 " pxor 48(%4), %%mm6 ;\n" 410 " pxor 56(%4), %%mm7 ;\n" 411 " movq %%mm6, 48(%1) ;\n" 412 " movq %%mm7, 56(%1) ;\n" 413 414 " addl $64, %1 ;\n" 415 " addl $64, %2 ;\n" 416 " addl $64, %3 ;\n" 417 " addl $64, %4 ;\n" 418 " decl %0 ;\n" 419 " jnz 1b ;\n" 420 : "+r" (lines), 421 "+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4) 422 : 423 : "memory"); 424 425 kernel_fpu_end(); 426 } 427 428 static void 429 xor_p5_mmx_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, 430 unsigned long *p3, unsigned long *p4, unsigned long *p5) 431 { 432 unsigned long lines = bytes >> 6; 433 434 kernel_fpu_begin(); 435 436 /* Make sure GCC forgets anything it knows about p4 or p5, 437 such that it won't pass to the asm volatile below a 438 register that is shared with any other variable. That's 439 because we modify p4 and p5 there, but we can't mark them 440 as read/write, otherwise we'd overflow the 10-asm-operands 441 limit of GCC < 3.1. */ 442 asm("" : "+r" (p4), "+r" (p5)); 443 444 asm volatile( 445 " .align 32,0x90 ;\n" 446 " 1: ;\n" 447 " movq (%1), %%mm0 ;\n" 448 " movq 8(%1), %%mm1 ;\n" 449 " pxor (%2), %%mm0 ;\n" 450 " pxor 8(%2), %%mm1 ;\n" 451 " movq 16(%1), %%mm2 ;\n" 452 " pxor (%3), %%mm0 ;\n" 453 " pxor 8(%3), %%mm1 ;\n" 454 " pxor 16(%2), %%mm2 ;\n" 455 " pxor (%4), %%mm0 ;\n" 456 " pxor 8(%4), %%mm1 ;\n" 457 " pxor 16(%3), %%mm2 ;\n" 458 " movq 24(%1), %%mm3 ;\n" 459 " pxor (%5), %%mm0 ;\n" 460 " pxor 8(%5), %%mm1 ;\n" 461 " movq %%mm0, (%1) ;\n" 462 " pxor 16(%4), %%mm2 ;\n" 463 " pxor 24(%2), %%mm3 ;\n" 464 " movq %%mm1, 8(%1) ;\n" 465 " pxor 16(%5), %%mm2 ;\n" 466 " pxor 24(%3), %%mm3 ;\n" 467 " movq 32(%1), %%mm4 ;\n" 468 " movq %%mm2, 16(%1) ;\n" 469 " pxor 24(%4), %%mm3 ;\n" 470 " pxor 32(%2), %%mm4 ;\n" 471 " movq 40(%1), %%mm5 ;\n" 472 " pxor 24(%5), %%mm3 ;\n" 473 " pxor 32(%3), %%mm4 ;\n" 474 " pxor 40(%2), %%mm5 ;\n" 475 " movq %%mm3, 24(%1) ;\n" 476 " pxor 32(%4), %%mm4 ;\n" 477 " pxor 40(%3), %%mm5 ;\n" 478 " movq 48(%1), %%mm6 ;\n" 479 " movq 56(%1), %%mm7 ;\n" 480 " pxor 32(%5), %%mm4 ;\n" 481 " pxor 40(%4), %%mm5 ;\n" 482 " pxor 48(%2), %%mm6 ;\n" 483 " pxor 56(%2), %%mm7 ;\n" 484 " movq %%mm4, 32(%1) ;\n" 485 " pxor 48(%3), %%mm6 ;\n" 486 " pxor 56(%3), %%mm7 ;\n" 487 " pxor 40(%5), %%mm5 ;\n" 488 " pxor 48(%4), %%mm6 ;\n" 489 " pxor 56(%4), %%mm7 ;\n" 490 " movq %%mm5, 40(%1) ;\n" 491 " pxor 48(%5), %%mm6 ;\n" 492 " pxor 56(%5), %%mm7 ;\n" 493 " movq %%mm6, 48(%1) ;\n" 494 " movq %%mm7, 56(%1) ;\n" 495 496 " addl $64, %1 ;\n" 497 " addl $64, %2 ;\n" 498 " addl $64, %3 ;\n" 499 " addl $64, %4 ;\n" 500 " addl $64, %5 ;\n" 501 " decl %0 ;\n" 502 " jnz 1b ;\n" 503 : "+r" (lines), 504 "+r" (p1), "+r" (p2), "+r" (p3) 505 : "r" (p4), "r" (p5) 506 : "memory"); 507 508 /* p4 and p5 were modified, and now the variables are dead. 509 Clobber them just to be sure nobody does something stupid 510 like assuming they have some legal value. */ 511 asm("" : "=r" (p4), "=r" (p5)); 512 513 kernel_fpu_end(); 514 } 515 516 static struct xor_block_template xor_block_pII_mmx = { 517 .name = "pII_mmx", 518 .do_2 = xor_pII_mmx_2, 519 .do_3 = xor_pII_mmx_3, 520 .do_4 = xor_pII_mmx_4, 521 .do_5 = xor_pII_mmx_5, 522 }; 523 524 static struct xor_block_template xor_block_p5_mmx = { 525 .name = "p5_mmx", 526 .do_2 = xor_p5_mmx_2, 527 .do_3 = xor_p5_mmx_3, 528 .do_4 = xor_p5_mmx_4, 529 .do_5 = xor_p5_mmx_5, 530 }; 531 532 static struct xor_block_template xor_block_pIII_sse = { 533 .name = "pIII_sse", 534 .do_2 = xor_sse_2, 535 .do_3 = xor_sse_3, 536 .do_4 = xor_sse_4, 537 .do_5 = xor_sse_5, 538 }; 539 540 /* Also try the AVX routines */ 541 #include <asm/xor_avx.h> 542 543 /* Also try the generic routines. */ 544 #include <asm-generic/xor.h> 545 546 /* We force the use of the SSE xor block because it can write around L2. 547 We may also be able to load into the L1 only depending on how the cpu 548 deals with a load to a line that is being prefetched. */ 549 #undef XOR_TRY_TEMPLATES 550 #define XOR_TRY_TEMPLATES \ 551 do { \ 552 AVX_XOR_SPEED; \ 553 if (cpu_has_xmm) { \ 554 xor_speed(&xor_block_pIII_sse); \ 555 xor_speed(&xor_block_sse_pf64); \ 556 } else if (cpu_has_mmx) { \ 557 xor_speed(&xor_block_pII_mmx); \ 558 xor_speed(&xor_block_p5_mmx); \ 559 } else { \ 560 xor_speed(&xor_block_8regs); \ 561 xor_speed(&xor_block_8regs_p); \ 562 xor_speed(&xor_block_32regs); \ 563 xor_speed(&xor_block_32regs_p); \ 564 } \ 565 } while (0) 566 567 #endif /* _ASM_X86_XOR_32_H */ 568