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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 | /* * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2008 Jim Law - Iris LP All rights reserved. * * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. * * Written by Jim Law <jlaw@irispower.com> * * intended to replace: * memcpy in memcpy.c and * memmove in memmove.c * ... in arch/microblaze/lib * * * assly_fastcopy.S * * Attempt at quicker memcpy and memmove for MicroBlaze * Input : Operand1 in Reg r5 - destination address * Operand2 in Reg r6 - source address * Operand3 in Reg r7 - number of bytes to transfer * Output: Result in Reg r3 - starting destinaition address * * * Explanation: * Perform (possibly unaligned) copy of a block of memory * between mem locations with size of xfer spec'd in bytes */ #include <linux/linkage.h> .text .globl memcpy .type memcpy, @function .ent memcpy memcpy: fast_memcpy_ascending: /* move d to return register as value of function */ addi r3, r5, 0 addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4, a_xfer_end /* if n < 0, less than one word to transfer */ /* transfer first 0~3 bytes to get aligned dest address */ andi r4, r5, 3 /* n = d & 3 */ /* if zero, destination already aligned */ beqi r4, a_dalign_done /* n = 4 - n (yields 3, 2, 1 transfers for 1, 2, 3 addr offset) */ rsubi r4, r4, 4 rsub r7, r4, r7 /* c = c - n adjust c */ a_xfer_first_loop: /* if no bytes left to transfer, transfer the bulk */ beqi r4, a_dalign_done lbui r11, r6, 0 /* h = *s */ sbi r11, r5, 0 /* *d = h */ addi r6, r6, 1 /* s++ */ addi r5, r5, 1 /* d++ */ brid a_xfer_first_loop /* loop */ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */ a_dalign_done: addi r4, r0, 32 /* n = 32 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ /* if n < 0, less than one block to transfer */ blti r4, a_block_done a_block_xfer: andi r4, r7, 0xffffffe0 /* n = c & ~31 */ rsub r7, r4, r7 /* c = c - n */ andi r9, r6, 3 /* t1 = s & 3 */ /* if temp != 0, unaligned transfers needed */ bnei r9, a_block_unaligned a_block_aligned: lwi r9, r6, 0 /* t1 = *(s + 0) */ lwi r10, r6, 4 /* t2 = *(s + 4) */ lwi r11, r6, 8 /* t3 = *(s + 8) */ lwi r12, r6, 12 /* t4 = *(s + 12) */ swi r9, r5, 0 /* *(d + 0) = t1 */ swi r10, r5, 4 /* *(d + 4) = t2 */ swi r11, r5, 8 /* *(d + 8) = t3 */ swi r12, r5, 12 /* *(d + 12) = t4 */ lwi r9, r6, 16 /* t1 = *(s + 16) */ lwi r10, r6, 20 /* t2 = *(s + 20) */ lwi r11, r6, 24 /* t3 = *(s + 24) */ lwi r12, r6, 28 /* t4 = *(s + 28) */ swi r9, r5, 16 /* *(d + 16) = t1 */ swi r10, r5, 20 /* *(d + 20) = t2 */ swi r11, r5, 24 /* *(d + 24) = t3 */ swi r12, r5, 28 /* *(d + 28) = t4 */ addi r6, r6, 32 /* s = s + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_block_aligned /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ add r6, r6, r4 /* s = s + n */ lwi r11, r8, 0 /* h = *(as + 0) */ addi r9, r9, -1 beqi r9, a_block_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9, a_block_u2 /* t1 was 2 => 2 byte offset */ a_block_u3: bslli r11, r11, 24 /* h = h << 24 */ a_bu3_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu3_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_u1: bslli r11, r11, 8 /* h = h << 8 */ a_bu1_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu1_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_u2: bslli r11, r11, 16 /* h = h << 16 */ a_bu2_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu2_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ a_block_done: addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4, a_xfer_end /* if n < 0, less than one word to transfer */ a_word_xfer: andi r4, r7, 0xfffffffc /* n = c & ~3 */ addi r10, r0, 0 /* offset = 0 */ andi r9, r6, 3 /* t1 = s & 3 */ /* if temp != 0, unaligned transfers needed */ bnei r9, a_word_unaligned a_word_aligned: lw r9, r6, r10 /* t1 = *(s+offset) */ sw r9, r5, r10 /* *(d+offset) = t1 */ addi r4, r4,-4 /* n-- */ bneid r4, a_word_aligned /* loop */ addi r10, r10, 4 /* offset++ (IN DELAY SLOT) */ bri a_word_done a_word_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ lwi r11, r8, 0 /* h = *(as + 0) */ addi r8, r8, 4 /* as = as + 4 */ addi r9, r9, -1 beqi r9, a_word_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9, a_word_u2 /* t1 was 2 => 2 byte offset */ a_word_u3: bslli r11, r11, 24 /* h = h << 24 */ a_wu3_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu3_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ bri a_word_done a_word_u1: bslli r11, r11, 8 /* h = h << 8 */ a_wu1_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu1_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ bri a_word_done a_word_u2: bslli r11, r11, 16 /* h = h << 16 */ a_wu2_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu2_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ a_word_done: add r5, r5, r10 /* d = d + offset */ add r6, r6, r10 /* s = s + offset */ rsub r7, r10, r7 /* c = c - offset */ a_xfer_end: a_xfer_end_loop: beqi r7, a_done /* while (c) */ lbui r9, r6, 0 /* t1 = *s */ addi r6, r6, 1 /* s++ */ sbi r9, r5, 0 /* *d = t1 */ addi r7, r7, -1 /* c-- */ brid a_xfer_end_loop /* loop */ addi r5, r5, 1 /* d++ (IN DELAY SLOT) */ a_done: rtsd r15, 8 nop .size memcpy, . - memcpy .end memcpy /*----------------------------------------------------------------------------*/ .globl memmove .type memmove, @function .ent memmove memmove: cmpu r4, r5, r6 /* n = s - d */ bgei r4,fast_memcpy_ascending fast_memcpy_descending: /* move d to return register as value of function */ addi r3, r5, 0 add r5, r5, r7 /* d = d + c */ add r6, r6, r7 /* s = s + c */ addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */ /* transfer first 0~3 bytes to get aligned dest address */ andi r4, r5, 3 /* n = d & 3 */ /* if zero, destination already aligned */ beqi r4,d_dalign_done rsub r7, r4, r7 /* c = c - n adjust c */ d_xfer_first_loop: /* if no bytes left to transfer, transfer the bulk */ beqi r4,d_dalign_done addi r6, r6, -1 /* s-- */ addi r5, r5, -1 /* d-- */ lbui r11, r6, 0 /* h = *s */ sbi r11, r5, 0 /* *d = h */ brid d_xfer_first_loop /* loop */ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */ d_dalign_done: addi r4, r0, 32 /* n = 32 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ /* if n < 0, less than one block to transfer */ blti r4, d_block_done d_block_xfer: andi r4, r7, 0xffffffe0 /* n = c & ~31 */ rsub r7, r4, r7 /* c = c - n */ andi r9, r6, 3 /* t1 = s & 3 */ /* if temp != 0, unaligned transfers needed */ bnei r9, d_block_unaligned d_block_aligned: addi r6, r6, -32 /* s = s - 32 */ addi r5, r5, -32 /* d = d - 32 */ lwi r9, r6, 28 /* t1 = *(s + 28) */ lwi r10, r6, 24 /* t2 = *(s + 24) */ lwi r11, r6, 20 /* t3 = *(s + 20) */ lwi r12, r6, 16 /* t4 = *(s + 16) */ swi r9, r5, 28 /* *(d + 28) = t1 */ swi r10, r5, 24 /* *(d + 24) = t2 */ swi r11, r5, 20 /* *(d + 20) = t3 */ swi r12, r5, 16 /* *(d + 16) = t4 */ lwi r9, r6, 12 /* t1 = *(s + 12) */ lwi r10, r6, 8 /* t2 = *(s + 8) */ lwi r11, r6, 4 /* t3 = *(s + 4) */ lwi r12, r6, 0 /* t4 = *(s + 0) */ swi r9, r5, 12 /* *(d + 12) = t1 */ swi r10, r5, 8 /* *(d + 8) = t2 */ swi r11, r5, 4 /* *(d + 4) = t3 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, d_block_aligned /* while (n) loop */ swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */ bri d_block_done d_block_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ rsub r6, r4, r6 /* s = s - n */ lwi r11, r8, 0 /* h = *(as + 0) */ addi r9, r9, -1 beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */ d_block_u3: bsrli r11, r11, 8 /* h = h >> 8 */ d_bu3_loop: addi r8, r8, -32 /* as = as - 32 */ addi r5, r5, -32 /* d = d - 32 */ lwi r12, r8, 28 /* v = *(as + 28) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 24 /* v = *(as + 24) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 20 /* v = *(as + 20) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 16 /* v = *(as + 16) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 12 /* v = *(as + 12) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 112) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 8 /* v = *(as + 8) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 4 /* v = *(as + 4) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bsrli r11, r12, 8 /* h = v >> 8 */ lwi r12, r8, 0 /* v = *(as + 0) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, d_bu3_loop /* while (n) loop */ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */ bri d_block_done d_block_u1: bsrli r11, r11, 24 /* h = h >> 24 */ d_bu1_loop: addi r8, r8, -32 /* as = as - 32 */ addi r5, r5, -32 /* d = d - 32 */ lwi r12, r8, 28 /* v = *(as + 28) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 24 /* v = *(as + 24) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 20 /* v = *(as + 20) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 16 /* v = *(as + 16) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 12 /* v = *(as + 12) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 112) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 8 /* v = *(as + 8) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 4 /* v = *(as + 4) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bsrli r11, r12, 24 /* h = v >> 24 */ lwi r12, r8, 0 /* v = *(as + 0) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, d_bu1_loop /* while (n) loop */ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */ bri d_block_done d_block_u2: bsrli r11, r11, 16 /* h = h >> 16 */ d_bu2_loop: addi r8, r8, -32 /* as = as - 32 */ addi r5, r5, -32 /* d = d - 32 */ lwi r12, r8, 28 /* v = *(as + 28) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 24 /* v = *(as + 24) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 20 /* v = *(as + 20) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 16 /* v = *(as + 16) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 12 /* v = *(as + 12) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 112) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 8 /* v = *(as + 8) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 4 /* v = *(as + 4) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bsrli r11, r12, 16 /* h = v >> 16 */ lwi r12, r8, 0 /* v = *(as + 0) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, d_bu2_loop /* while (n) loop */ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */ d_block_done: addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */ d_word_xfer: andi r4, r7, 0xfffffffc /* n = c & ~3 */ rsub r5, r4, r5 /* d = d - n */ rsub r6, r4, r6 /* s = s - n */ rsub r7, r4, r7 /* c = c - n */ andi r9, r6, 3 /* t1 = s & 3 */ /* if temp != 0, unaligned transfers needed */ bnei r9, d_word_unaligned d_word_aligned: addi r4, r4,-4 /* n-- */ lw r9, r6, r4 /* t1 = *(s+n) */ bneid r4, d_word_aligned /* loop */ sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */ bri d_word_done d_word_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ lw r11, r8, r4 /* h = *(as + n) */ addi r9, r9, -1 beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */ d_word_u3: bsrli r11, r11, 8 /* h = h >> 8 */ d_wu3_loop: addi r4, r4,-4 /* n = n - 4 */ lw r12, r8, r4 /* v = *(as + n) */ bslli r9, r12, 24 /* t1 = v << 24 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r4 /* *(d + n) = t1 */ bneid r4, d_wu3_loop /* while (n) loop */ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */ bri d_word_done d_word_u1: bsrli r11, r11, 24 /* h = h >> 24 */ d_wu1_loop: addi r4, r4,-4 /* n = n - 4 */ lw r12, r8, r4 /* v = *(as + n) */ bslli r9, r12, 8 /* t1 = v << 8 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r4 /* *(d + n) = t1 */ bneid r4, d_wu1_loop /* while (n) loop */ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */ bri d_word_done d_word_u2: bsrli r11, r11, 16 /* h = h >> 16 */ d_wu2_loop: addi r4, r4,-4 /* n = n - 4 */ lw r12, r8, r4 /* v = *(as + n) */ bslli r9, r12, 16 /* t1 = v << 16 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r4 /* *(d + n) = t1 */ bneid r4, d_wu2_loop /* while (n) loop */ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */ d_word_done: d_xfer_end: d_xfer_end_loop: beqi r7, a_done /* while (c) */ addi r6, r6, -1 /* s-- */ lbui r9, r6, 0 /* t1 = *s */ addi r5, r5, -1 /* d-- */ sbi r9, r5, 0 /* *d = t1 */ brid d_xfer_end_loop /* loop */ addi r7, r7, -1 /* c-- (IN DELAY SLOT) */ d_done: rtsd r15, 8 nop .size memmove, . - memmove .end memmove |