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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ChaCha 256-bit cipher algorithm, x64 SSSE3 functions * * Copyright (C) 2015 Martin Willi */ #include <linux/linkage.h> #include <asm/frame.h> .section .rodata.cst16.ROT8, "aM", @progbits, 16 .align 16 ROT8: .octa 0x0e0d0c0f0a09080b0605040702010003 .section .rodata.cst16.ROT16, "aM", @progbits, 16 .align 16 ROT16: .octa 0x0d0c0f0e09080b0a0504070601000302 .section .rodata.cst16.CTRINC, "aM", @progbits, 16 .align 16 CTRINC: .octa 0x00000003000000020000000100000000 .text /* * chacha_permute - permute one block * * Permute one 64-byte block where the state matrix is in %xmm0-%xmm3. This * function performs matrix operations on four words in parallel, but requires * shuffling to rearrange the words after each round. 8/16-bit word rotation is * done with the slightly better performing SSSE3 byte shuffling, 7/12-bit word * rotation uses traditional shift+OR. * * The round count is given in %r8d. * * Clobbers: %r8d, %xmm4-%xmm7 */ SYM_FUNC_START_LOCAL(chacha_permute) movdqa ROT8(%rip),%xmm4 movdqa ROT16(%rip),%xmm5 .Ldoubleround: # x0 += x1, x3 = rotl32(x3 ^ x0, 16) paddd %xmm1,%xmm0 pxor %xmm0,%xmm3 pshufb %xmm5,%xmm3 # x2 += x3, x1 = rotl32(x1 ^ x2, 12) paddd %xmm3,%xmm2 pxor %xmm2,%xmm1 movdqa %xmm1,%xmm6 pslld $12,%xmm6 psrld $20,%xmm1 por %xmm6,%xmm1 # x0 += x1, x3 = rotl32(x3 ^ x0, 8) paddd %xmm1,%xmm0 pxor %xmm0,%xmm3 pshufb %xmm4,%xmm3 # x2 += x3, x1 = rotl32(x1 ^ x2, 7) paddd %xmm3,%xmm2 pxor %xmm2,%xmm1 movdqa %xmm1,%xmm7 pslld $7,%xmm7 psrld $25,%xmm1 por %xmm7,%xmm1 # x1 = shuffle32(x1, MASK(0, 3, 2, 1)) pshufd $0x39,%xmm1,%xmm1 # x2 = shuffle32(x2, MASK(1, 0, 3, 2)) pshufd $0x4e,%xmm2,%xmm2 # x3 = shuffle32(x3, MASK(2, 1, 0, 3)) pshufd $0x93,%xmm3,%xmm3 # x0 += x1, x3 = rotl32(x3 ^ x0, 16) paddd %xmm1,%xmm0 pxor %xmm0,%xmm3 pshufb %xmm5,%xmm3 # x2 += x3, x1 = rotl32(x1 ^ x2, 12) paddd %xmm3,%xmm2 pxor %xmm2,%xmm1 movdqa %xmm1,%xmm6 pslld $12,%xmm6 psrld $20,%xmm1 por %xmm6,%xmm1 # x0 += x1, x3 = rotl32(x3 ^ x0, 8) paddd %xmm1,%xmm0 pxor %xmm0,%xmm3 pshufb %xmm4,%xmm3 # x2 += x3, x1 = rotl32(x1 ^ x2, 7) paddd %xmm3,%xmm2 pxor %xmm2,%xmm1 movdqa %xmm1,%xmm7 pslld $7,%xmm7 psrld $25,%xmm1 por %xmm7,%xmm1 # x1 = shuffle32(x1, MASK(2, 1, 0, 3)) pshufd $0x93,%xmm1,%xmm1 # x2 = shuffle32(x2, MASK(1, 0, 3, 2)) pshufd $0x4e,%xmm2,%xmm2 # x3 = shuffle32(x3, MASK(0, 3, 2, 1)) pshufd $0x39,%xmm3,%xmm3 sub $2,%r8d jnz .Ldoubleround ret SYM_FUNC_END(chacha_permute) SYM_FUNC_START(chacha_block_xor_ssse3) # %rdi: Input state matrix, s # %rsi: up to 1 data block output, o # %rdx: up to 1 data block input, i # %rcx: input/output length in bytes # %r8d: nrounds FRAME_BEGIN # x0..3 = s0..3 movdqu 0x00(%rdi),%xmm0 movdqu 0x10(%rdi),%xmm1 movdqu 0x20(%rdi),%xmm2 movdqu 0x30(%rdi),%xmm3 movdqa %xmm0,%xmm8 movdqa %xmm1,%xmm9 movdqa %xmm2,%xmm10 movdqa %xmm3,%xmm11 mov %rcx,%rax call chacha_permute # o0 = i0 ^ (x0 + s0) paddd %xmm8,%xmm0 cmp $0x10,%rax jl .Lxorpart movdqu 0x00(%rdx),%xmm4 pxor %xmm4,%xmm0 movdqu %xmm0,0x00(%rsi) # o1 = i1 ^ (x1 + s1) paddd %xmm9,%xmm1 movdqa %xmm1,%xmm0 cmp $0x20,%rax jl .Lxorpart movdqu 0x10(%rdx),%xmm0 pxor %xmm1,%xmm0 movdqu %xmm0,0x10(%rsi) # o2 = i2 ^ (x2 + s2) paddd %xmm10,%xmm2 movdqa %xmm2,%xmm0 cmp $0x30,%rax jl .Lxorpart movdqu 0x20(%rdx),%xmm0 pxor %xmm2,%xmm0 movdqu %xmm0,0x20(%rsi) # o3 = i3 ^ (x3 + s3) paddd %xmm11,%xmm3 movdqa %xmm3,%xmm0 cmp $0x40,%rax jl .Lxorpart movdqu 0x30(%rdx),%xmm0 pxor %xmm3,%xmm0 movdqu %xmm0,0x30(%rsi) .Ldone: FRAME_END ret .Lxorpart: # xor remaining bytes from partial register into output mov %rax,%r9 and $0x0f,%r9 jz .Ldone and $~0x0f,%rax mov %rsi,%r11 lea 8(%rsp),%r10 sub $0x10,%rsp and $~31,%rsp lea (%rdx,%rax),%rsi mov %rsp,%rdi mov %r9,%rcx rep movsb pxor 0x00(%rsp),%xmm0 movdqa %xmm0,0x00(%rsp) mov %rsp,%rsi lea (%r11,%rax),%rdi mov %r9,%rcx rep movsb lea -8(%r10),%rsp jmp .Ldone SYM_FUNC_END(chacha_block_xor_ssse3) SYM_FUNC_START(hchacha_block_ssse3) # %rdi: Input state matrix, s # %rsi: output (8 32-bit words) # %edx: nrounds FRAME_BEGIN movdqu 0x00(%rdi),%xmm0 movdqu 0x10(%rdi),%xmm1 movdqu 0x20(%rdi),%xmm2 movdqu 0x30(%rdi),%xmm3 mov %edx,%r8d call chacha_permute movdqu %xmm0,0x00(%rsi) movdqu %xmm3,0x10(%rsi) FRAME_END ret SYM_FUNC_END(hchacha_block_ssse3) SYM_FUNC_START(chacha_4block_xor_ssse3) # %rdi: Input state matrix, s # %rsi: up to 4 data blocks output, o # %rdx: up to 4 data blocks input, i # %rcx: input/output length in bytes # %r8d: nrounds # This function encrypts four consecutive ChaCha blocks by loading the # the state matrix in SSE registers four times. As we need some scratch # registers, we save the first four registers on the stack. The # algorithm performs each operation on the corresponding word of each # state matrix, hence requires no word shuffling. For final XORing step # we transpose the matrix by interleaving 32- and then 64-bit words, # which allows us to do XOR in SSE registers. 8/16-bit word rotation is # done with the slightly better performing SSSE3 byte shuffling, # 7/12-bit word rotation uses traditional shift+OR. lea 8(%rsp),%r10 sub $0x80,%rsp and $~63,%rsp mov %rcx,%rax # x0..15[0-3] = s0..3[0..3] movq 0x00(%rdi),%xmm1 pshufd $0x00,%xmm1,%xmm0 pshufd $0x55,%xmm1,%xmm1 movq 0x08(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 movq 0x10(%rdi),%xmm5 pshufd $0x00,%xmm5,%xmm4 pshufd $0x55,%xmm5,%xmm5 movq 0x18(%rdi),%xmm7 pshufd $0x00,%xmm7,%xmm6 pshufd $0x55,%xmm7,%xmm7 movq 0x20(%rdi),%xmm9 pshufd $0x00,%xmm9,%xmm8 pshufd $0x55,%xmm9,%xmm9 movq 0x28(%rdi),%xmm11 pshufd $0x00,%xmm11,%xmm10 pshufd $0x55,%xmm11,%xmm11 movq 0x30(%rdi),%xmm13 pshufd $0x00,%xmm13,%xmm12 pshufd $0x55,%xmm13,%xmm13 movq 0x38(%rdi),%xmm15 pshufd $0x00,%xmm15,%xmm14 pshufd $0x55,%xmm15,%xmm15 # x0..3 on stack movdqa %xmm0,0x00(%rsp) movdqa %xmm1,0x10(%rsp) movdqa %xmm2,0x20(%rsp) movdqa %xmm3,0x30(%rsp) movdqa CTRINC(%rip),%xmm1 movdqa ROT8(%rip),%xmm2 movdqa ROT16(%rip),%xmm3 # x12 += counter values 0-3 paddd %xmm1,%xmm12 .Ldoubleround4: # x0 += x4, x12 = rotl32(x12 ^ x0, 16) movdqa 0x00(%rsp),%xmm0 paddd %xmm4,%xmm0 movdqa %xmm0,0x00(%rsp) pxor %xmm0,%xmm12 pshufb %xmm3,%xmm12 # x1 += x5, x13 = rotl32(x13 ^ x1, 16) movdqa 0x10(%rsp),%xmm0 paddd %xmm5,%xmm0 movdqa %xmm0,0x10(%rsp) pxor %xmm0,%xmm13 pshufb %xmm3,%xmm13 # x2 += x6, x14 = rotl32(x14 ^ x2, 16) movdqa 0x20(%rsp),%xmm0 paddd %xmm6,%xmm0 movdqa %xmm0,0x20(%rsp) pxor %xmm0,%xmm14 pshufb %xmm3,%xmm14 # x3 += x7, x15 = rotl32(x15 ^ x3, 16) movdqa 0x30(%rsp),%xmm0 paddd %xmm7,%xmm0 movdqa %xmm0,0x30(%rsp) pxor %xmm0,%xmm15 pshufb %xmm3,%xmm15 # x8 += x12, x4 = rotl32(x4 ^ x8, 12) paddd %xmm12,%xmm8 pxor %xmm8,%xmm4 movdqa %xmm4,%xmm0 pslld $12,%xmm0 psrld $20,%xmm4 por %xmm0,%xmm4 # x9 += x13, x5 = rotl32(x5 ^ x9, 12) paddd %xmm13,%xmm9 pxor %xmm9,%xmm5 movdqa %xmm5,%xmm0 pslld $12,%xmm0 psrld $20,%xmm5 por %xmm0,%xmm5 # x10 += x14, x6 = rotl32(x6 ^ x10, 12) paddd %xmm14,%xmm10 pxor %xmm10,%xmm6 movdqa %xmm6,%xmm0 pslld $12,%xmm0 psrld $20,%xmm6 por %xmm0,%xmm6 # x11 += x15, x7 = rotl32(x7 ^ x11, 12) paddd %xmm15,%xmm11 pxor %xmm11,%xmm7 movdqa %xmm7,%xmm0 pslld $12,%xmm0 psrld $20,%xmm7 por %xmm0,%xmm7 # x0 += x4, x12 = rotl32(x12 ^ x0, 8) movdqa 0x00(%rsp),%xmm0 paddd %xmm4,%xmm0 movdqa %xmm0,0x00(%rsp) pxor %xmm0,%xmm12 pshufb %xmm2,%xmm12 # x1 += x5, x13 = rotl32(x13 ^ x1, 8) movdqa 0x10(%rsp),%xmm0 paddd %xmm5,%xmm0 movdqa %xmm0,0x10(%rsp) pxor %xmm0,%xmm13 pshufb %xmm2,%xmm13 # x2 += x6, x14 = rotl32(x14 ^ x2, 8) movdqa 0x20(%rsp),%xmm0 paddd %xmm6,%xmm0 movdqa %xmm0,0x20(%rsp) pxor %xmm0,%xmm14 pshufb %xmm2,%xmm14 # x3 += x7, x15 = rotl32(x15 ^ x3, 8) movdqa 0x30(%rsp),%xmm0 paddd %xmm7,%xmm0 movdqa %xmm0,0x30(%rsp) pxor %xmm0,%xmm15 pshufb %xmm2,%xmm15 # x8 += x12, x4 = rotl32(x4 ^ x8, 7) paddd %xmm12,%xmm8 pxor %xmm8,%xmm4 movdqa %xmm4,%xmm0 pslld $7,%xmm0 psrld $25,%xmm4 por %xmm0,%xmm4 # x9 += x13, x5 = rotl32(x5 ^ x9, 7) paddd %xmm13,%xmm9 pxor %xmm9,%xmm5 movdqa %xmm5,%xmm0 pslld $7,%xmm0 psrld $25,%xmm5 por %xmm0,%xmm5 # x10 += x14, x6 = rotl32(x6 ^ x10, 7) paddd %xmm14,%xmm10 pxor %xmm10,%xmm6 movdqa %xmm6,%xmm0 pslld $7,%xmm0 psrld $25,%xmm6 por %xmm0,%xmm6 # x11 += x15, x7 = rotl32(x7 ^ x11, 7) paddd %xmm15,%xmm11 pxor %xmm11,%xmm7 movdqa %xmm7,%xmm0 pslld $7,%xmm0 psrld $25,%xmm7 por %xmm0,%xmm7 # x0 += x5, x15 = rotl32(x15 ^ x0, 16) movdqa 0x00(%rsp),%xmm0 paddd %xmm5,%xmm0 movdqa %xmm0,0x00(%rsp) pxor %xmm0,%xmm15 pshufb %xmm3,%xmm15 # x1 += x6, x12 = rotl32(x12 ^ x1, 16) movdqa 0x10(%rsp),%xmm0 paddd %xmm6,%xmm0 movdqa %xmm0,0x10(%rsp) pxor %xmm0,%xmm12 pshufb %xmm3,%xmm12 # x2 += x7, x13 = rotl32(x13 ^ x2, 16) movdqa 0x20(%rsp),%xmm0 paddd %xmm7,%xmm0 movdqa %xmm0,0x20(%rsp) pxor %xmm0,%xmm13 pshufb %xmm3,%xmm13 # x3 += x4, x14 = rotl32(x14 ^ x3, 16) movdqa 0x30(%rsp),%xmm0 paddd %xmm4,%xmm0 movdqa %xmm0,0x30(%rsp) pxor %xmm0,%xmm14 pshufb %xmm3,%xmm14 # x10 += x15, x5 = rotl32(x5 ^ x10, 12) paddd %xmm15,%xmm10 pxor %xmm10,%xmm5 movdqa %xmm5,%xmm0 pslld $12,%xmm0 psrld $20,%xmm5 por %xmm0,%xmm5 # x11 += x12, x6 = rotl32(x6 ^ x11, 12) paddd %xmm12,%xmm11 pxor %xmm11,%xmm6 movdqa %xmm6,%xmm0 pslld $12,%xmm0 psrld $20,%xmm6 por %xmm0,%xmm6 # x8 += x13, x7 = rotl32(x7 ^ x8, 12) paddd %xmm13,%xmm8 pxor %xmm8,%xmm7 movdqa %xmm7,%xmm0 pslld $12,%xmm0 psrld $20,%xmm7 por %xmm0,%xmm7 # x9 += x14, x4 = rotl32(x4 ^ x9, 12) paddd %xmm14,%xmm9 pxor %xmm9,%xmm4 movdqa %xmm4,%xmm0 pslld $12,%xmm0 psrld $20,%xmm4 por %xmm0,%xmm4 # x0 += x5, x15 = rotl32(x15 ^ x0, 8) movdqa 0x00(%rsp),%xmm0 paddd %xmm5,%xmm0 movdqa %xmm0,0x00(%rsp) pxor %xmm0,%xmm15 pshufb %xmm2,%xmm15 # x1 += x6, x12 = rotl32(x12 ^ x1, 8) movdqa 0x10(%rsp),%xmm0 paddd %xmm6,%xmm0 movdqa %xmm0,0x10(%rsp) pxor %xmm0,%xmm12 pshufb %xmm2,%xmm12 # x2 += x7, x13 = rotl32(x13 ^ x2, 8) movdqa 0x20(%rsp),%xmm0 paddd %xmm7,%xmm0 movdqa %xmm0,0x20(%rsp) pxor %xmm0,%xmm13 pshufb %xmm2,%xmm13 # x3 += x4, x14 = rotl32(x14 ^ x3, 8) movdqa 0x30(%rsp),%xmm0 paddd %xmm4,%xmm0 movdqa %xmm0,0x30(%rsp) pxor %xmm0,%xmm14 pshufb %xmm2,%xmm14 # x10 += x15, x5 = rotl32(x5 ^ x10, 7) paddd %xmm15,%xmm10 pxor %xmm10,%xmm5 movdqa %xmm5,%xmm0 pslld $7,%xmm0 psrld $25,%xmm5 por %xmm0,%xmm5 # x11 += x12, x6 = rotl32(x6 ^ x11, 7) paddd %xmm12,%xmm11 pxor %xmm11,%xmm6 movdqa %xmm6,%xmm0 pslld $7,%xmm0 psrld $25,%xmm6 por %xmm0,%xmm6 # x8 += x13, x7 = rotl32(x7 ^ x8, 7) paddd %xmm13,%xmm8 pxor %xmm8,%xmm7 movdqa %xmm7,%xmm0 pslld $7,%xmm0 psrld $25,%xmm7 por %xmm0,%xmm7 # x9 += x14, x4 = rotl32(x4 ^ x9, 7) paddd %xmm14,%xmm9 pxor %xmm9,%xmm4 movdqa %xmm4,%xmm0 pslld $7,%xmm0 psrld $25,%xmm4 por %xmm0,%xmm4 sub $2,%r8d jnz .Ldoubleround4 # x0[0-3] += s0[0] # x1[0-3] += s0[1] movq 0x00(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd 0x00(%rsp),%xmm2 movdqa %xmm2,0x00(%rsp) paddd 0x10(%rsp),%xmm3 movdqa %xmm3,0x10(%rsp) # x2[0-3] += s0[2] # x3[0-3] += s0[3] movq 0x08(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd 0x20(%rsp),%xmm2 movdqa %xmm2,0x20(%rsp) paddd 0x30(%rsp),%xmm3 movdqa %xmm3,0x30(%rsp) # x4[0-3] += s1[0] # x5[0-3] += s1[1] movq 0x10(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm4 paddd %xmm3,%xmm5 # x6[0-3] += s1[2] # x7[0-3] += s1[3] movq 0x18(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm6 paddd %xmm3,%xmm7 # x8[0-3] += s2[0] # x9[0-3] += s2[1] movq 0x20(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm8 paddd %xmm3,%xmm9 # x10[0-3] += s2[2] # x11[0-3] += s2[3] movq 0x28(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm10 paddd %xmm3,%xmm11 # x12[0-3] += s3[0] # x13[0-3] += s3[1] movq 0x30(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm12 paddd %xmm3,%xmm13 # x14[0-3] += s3[2] # x15[0-3] += s3[3] movq 0x38(%rdi),%xmm3 pshufd $0x00,%xmm3,%xmm2 pshufd $0x55,%xmm3,%xmm3 paddd %xmm2,%xmm14 paddd %xmm3,%xmm15 # x12 += counter values 0-3 paddd %xmm1,%xmm12 # interleave 32-bit words in state n, n+1 movdqa 0x00(%rsp),%xmm0 movdqa 0x10(%rsp),%xmm1 movdqa %xmm0,%xmm2 punpckldq %xmm1,%xmm2 punpckhdq %xmm1,%xmm0 movdqa %xmm2,0x00(%rsp) movdqa %xmm0,0x10(%rsp) movdqa 0x20(%rsp),%xmm0 movdqa 0x30(%rsp),%xmm1 movdqa %xmm0,%xmm2 punpckldq %xmm1,%xmm2 punpckhdq %xmm1,%xmm0 movdqa %xmm2,0x20(%rsp) movdqa %xmm0,0x30(%rsp) movdqa %xmm4,%xmm0 punpckldq %xmm5,%xmm4 punpckhdq %xmm5,%xmm0 movdqa %xmm0,%xmm5 movdqa %xmm6,%xmm0 punpckldq %xmm7,%xmm6 punpckhdq %xmm7,%xmm0 movdqa %xmm0,%xmm7 movdqa %xmm8,%xmm0 punpckldq %xmm9,%xmm8 punpckhdq %xmm9,%xmm0 movdqa %xmm0,%xmm9 movdqa %xmm10,%xmm0 punpckldq %xmm11,%xmm10 punpckhdq %xmm11,%xmm0 movdqa %xmm0,%xmm11 movdqa %xmm12,%xmm0 punpckldq %xmm13,%xmm12 punpckhdq %xmm13,%xmm0 movdqa %xmm0,%xmm13 movdqa %xmm14,%xmm0 punpckldq %xmm15,%xmm14 punpckhdq %xmm15,%xmm0 movdqa %xmm0,%xmm15 # interleave 64-bit words in state n, n+2 movdqa 0x00(%rsp),%xmm0 movdqa 0x20(%rsp),%xmm1 movdqa %xmm0,%xmm2 punpcklqdq %xmm1,%xmm2 punpckhqdq %xmm1,%xmm0 movdqa %xmm2,0x00(%rsp) movdqa %xmm0,0x20(%rsp) movdqa 0x10(%rsp),%xmm0 movdqa 0x30(%rsp),%xmm1 movdqa %xmm0,%xmm2 punpcklqdq %xmm1,%xmm2 punpckhqdq %xmm1,%xmm0 movdqa %xmm2,0x10(%rsp) movdqa %xmm0,0x30(%rsp) movdqa %xmm4,%xmm0 punpcklqdq %xmm6,%xmm4 punpckhqdq %xmm6,%xmm0 movdqa %xmm0,%xmm6 movdqa %xmm5,%xmm0 punpcklqdq %xmm7,%xmm5 punpckhqdq %xmm7,%xmm0 movdqa %xmm0,%xmm7 movdqa %xmm8,%xmm0 punpcklqdq %xmm10,%xmm8 punpckhqdq %xmm10,%xmm0 movdqa %xmm0,%xmm10 movdqa %xmm9,%xmm0 punpcklqdq %xmm11,%xmm9 punpckhqdq %xmm11,%xmm0 movdqa %xmm0,%xmm11 movdqa %xmm12,%xmm0 punpcklqdq %xmm14,%xmm12 punpckhqdq %xmm14,%xmm0 movdqa %xmm0,%xmm14 movdqa %xmm13,%xmm0 punpcklqdq %xmm15,%xmm13 punpckhqdq %xmm15,%xmm0 movdqa %xmm0,%xmm15 # xor with corresponding input, write to output movdqa 0x00(%rsp),%xmm0 cmp $0x10,%rax jl .Lxorpart4 movdqu 0x00(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x00(%rsi) movdqu %xmm4,%xmm0 cmp $0x20,%rax jl .Lxorpart4 movdqu 0x10(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x10(%rsi) movdqu %xmm8,%xmm0 cmp $0x30,%rax jl .Lxorpart4 movdqu 0x20(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x20(%rsi) movdqu %xmm12,%xmm0 cmp $0x40,%rax jl .Lxorpart4 movdqu 0x30(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x30(%rsi) movdqa 0x20(%rsp),%xmm0 cmp $0x50,%rax jl .Lxorpart4 movdqu 0x40(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x40(%rsi) movdqu %xmm6,%xmm0 cmp $0x60,%rax jl .Lxorpart4 movdqu 0x50(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x50(%rsi) movdqu %xmm10,%xmm0 cmp $0x70,%rax jl .Lxorpart4 movdqu 0x60(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x60(%rsi) movdqu %xmm14,%xmm0 cmp $0x80,%rax jl .Lxorpart4 movdqu 0x70(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x70(%rsi) movdqa 0x10(%rsp),%xmm0 cmp $0x90,%rax jl .Lxorpart4 movdqu 0x80(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x80(%rsi) movdqu %xmm5,%xmm0 cmp $0xa0,%rax jl .Lxorpart4 movdqu 0x90(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0x90(%rsi) movdqu %xmm9,%xmm0 cmp $0xb0,%rax jl .Lxorpart4 movdqu 0xa0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xa0(%rsi) movdqu %xmm13,%xmm0 cmp $0xc0,%rax jl .Lxorpart4 movdqu 0xb0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xb0(%rsi) movdqa 0x30(%rsp),%xmm0 cmp $0xd0,%rax jl .Lxorpart4 movdqu 0xc0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xc0(%rsi) movdqu %xmm7,%xmm0 cmp $0xe0,%rax jl .Lxorpart4 movdqu 0xd0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xd0(%rsi) movdqu %xmm11,%xmm0 cmp $0xf0,%rax jl .Lxorpart4 movdqu 0xe0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xe0(%rsi) movdqu %xmm15,%xmm0 cmp $0x100,%rax jl .Lxorpart4 movdqu 0xf0(%rdx),%xmm1 pxor %xmm1,%xmm0 movdqu %xmm0,0xf0(%rsi) .Ldone4: lea -8(%r10),%rsp ret .Lxorpart4: # xor remaining bytes from partial register into output mov %rax,%r9 and $0x0f,%r9 jz .Ldone4 and $~0x0f,%rax mov %rsi,%r11 lea (%rdx,%rax),%rsi mov %rsp,%rdi mov %r9,%rcx rep movsb pxor 0x00(%rsp),%xmm0 movdqa %xmm0,0x00(%rsp) mov %rsp,%rsi lea (%r11,%rax),%rdi mov %r9,%rcx rep movsb jmp .Ldone4 SYM_FUNC_END(chacha_4block_xor_ssse3) |