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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 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/arch/arm64/crypto/aes-modes.S - chaining mode wrappers for AES * * Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org> */ /* included by aes-ce.S and aes-neon.S */ .text .align 4 #ifndef MAX_STRIDE #define MAX_STRIDE 4 #endif #if MAX_STRIDE == 4 #define ST4(x...) x #define ST5(x...) #else #define ST4(x...) #define ST5(x...) x #endif aes_encrypt_block4x: encrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7 ret ENDPROC(aes_encrypt_block4x) aes_decrypt_block4x: decrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7 ret ENDPROC(aes_decrypt_block4x) #if MAX_STRIDE == 5 aes_encrypt_block5x: encrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7 ret ENDPROC(aes_encrypt_block5x) aes_decrypt_block5x: decrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7 ret ENDPROC(aes_decrypt_block5x) #endif /* * aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks) * aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks) */ AES_ENTRY(aes_ecb_encrypt) stp x29, x30, [sp, #-16]! mov x29, sp enc_prepare w3, x2, x5 .LecbencloopNx: subs w4, w4, #MAX_STRIDE bmi .Lecbenc1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */ ST4( bl aes_encrypt_block4x ) ST5( ld1 {v4.16b}, [x1], #16 ) ST5( bl aes_encrypt_block5x ) st1 {v0.16b-v3.16b}, [x0], #64 ST5( st1 {v4.16b}, [x0], #16 ) b .LecbencloopNx .Lecbenc1x: adds w4, w4, #MAX_STRIDE beq .Lecbencout .Lecbencloop: ld1 {v0.16b}, [x1], #16 /* get next pt block */ encrypt_block v0, w3, x2, x5, w6 st1 {v0.16b}, [x0], #16 subs w4, w4, #1 bne .Lecbencloop .Lecbencout: ldp x29, x30, [sp], #16 ret AES_ENDPROC(aes_ecb_encrypt) AES_ENTRY(aes_ecb_decrypt) stp x29, x30, [sp, #-16]! mov x29, sp dec_prepare w3, x2, x5 .LecbdecloopNx: subs w4, w4, #MAX_STRIDE bmi .Lecbdec1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ ST4( bl aes_decrypt_block4x ) ST5( ld1 {v4.16b}, [x1], #16 ) ST5( bl aes_decrypt_block5x ) st1 {v0.16b-v3.16b}, [x0], #64 ST5( st1 {v4.16b}, [x0], #16 ) b .LecbdecloopNx .Lecbdec1x: adds w4, w4, #MAX_STRIDE beq .Lecbdecout .Lecbdecloop: ld1 {v0.16b}, [x1], #16 /* get next ct block */ decrypt_block v0, w3, x2, x5, w6 st1 {v0.16b}, [x0], #16 subs w4, w4, #1 bne .Lecbdecloop .Lecbdecout: ldp x29, x30, [sp], #16 ret AES_ENDPROC(aes_ecb_decrypt) /* * aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 iv[]) * aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 iv[]) * aes_essiv_cbc_encrypt(u8 out[], u8 const in[], u32 const rk1[], * int rounds, int blocks, u8 iv[], * u32 const rk2[]); * aes_essiv_cbc_decrypt(u8 out[], u8 const in[], u32 const rk1[], * int rounds, int blocks, u8 iv[], * u32 const rk2[]); */ AES_ENTRY(aes_essiv_cbc_encrypt) ld1 {v4.16b}, [x5] /* get iv */ mov w8, #14 /* AES-256: 14 rounds */ enc_prepare w8, x6, x7 encrypt_block v4, w8, x6, x7, w9 enc_switch_key w3, x2, x6 b .Lcbcencloop4x AES_ENTRY(aes_cbc_encrypt) ld1 {v4.16b}, [x5] /* get iv */ enc_prepare w3, x2, x6 .Lcbcencloop4x: subs w4, w4, #4 bmi .Lcbcenc1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */ eor v0.16b, v0.16b, v4.16b /* ..and xor with iv */ encrypt_block v0, w3, x2, x6, w7 eor v1.16b, v1.16b, v0.16b encrypt_block v1, w3, x2, x6, w7 eor v2.16b, v2.16b, v1.16b encrypt_block v2, w3, x2, x6, w7 eor v3.16b, v3.16b, v2.16b encrypt_block v3, w3, x2, x6, w7 st1 {v0.16b-v3.16b}, [x0], #64 mov v4.16b, v3.16b b .Lcbcencloop4x .Lcbcenc1x: adds w4, w4, #4 beq .Lcbcencout .Lcbcencloop: ld1 {v0.16b}, [x1], #16 /* get next pt block */ eor v4.16b, v4.16b, v0.16b /* ..and xor with iv */ encrypt_block v4, w3, x2, x6, w7 st1 {v4.16b}, [x0], #16 subs w4, w4, #1 bne .Lcbcencloop .Lcbcencout: st1 {v4.16b}, [x5] /* return iv */ ret AES_ENDPROC(aes_cbc_encrypt) AES_ENDPROC(aes_essiv_cbc_encrypt) AES_ENTRY(aes_essiv_cbc_decrypt) stp x29, x30, [sp, #-16]! mov x29, sp ld1 {cbciv.16b}, [x5] /* get iv */ mov w8, #14 /* AES-256: 14 rounds */ enc_prepare w8, x6, x7 encrypt_block cbciv, w8, x6, x7, w9 b .Lessivcbcdecstart AES_ENTRY(aes_cbc_decrypt) stp x29, x30, [sp, #-16]! mov x29, sp ld1 {cbciv.16b}, [x5] /* get iv */ .Lessivcbcdecstart: dec_prepare w3, x2, x6 .LcbcdecloopNx: subs w4, w4, #MAX_STRIDE bmi .Lcbcdec1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ #if MAX_STRIDE == 5 ld1 {v4.16b}, [x1], #16 /* get 1 ct block */ mov v5.16b, v0.16b mov v6.16b, v1.16b mov v7.16b, v2.16b bl aes_decrypt_block5x sub x1, x1, #32 eor v0.16b, v0.16b, cbciv.16b eor v1.16b, v1.16b, v5.16b ld1 {v5.16b}, [x1], #16 /* reload 1 ct block */ ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */ eor v2.16b, v2.16b, v6.16b eor v3.16b, v3.16b, v7.16b eor v4.16b, v4.16b, v5.16b #else mov v4.16b, v0.16b mov v5.16b, v1.16b mov v6.16b, v2.16b bl aes_decrypt_block4x sub x1, x1, #16 eor v0.16b, v0.16b, cbciv.16b eor v1.16b, v1.16b, v4.16b ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */ eor v2.16b, v2.16b, v5.16b eor v3.16b, v3.16b, v6.16b #endif st1 {v0.16b-v3.16b}, [x0], #64 ST5( st1 {v4.16b}, [x0], #16 ) b .LcbcdecloopNx .Lcbcdec1x: adds w4, w4, #MAX_STRIDE beq .Lcbcdecout .Lcbcdecloop: ld1 {v1.16b}, [x1], #16 /* get next ct block */ mov v0.16b, v1.16b /* ...and copy to v0 */ decrypt_block v0, w3, x2, x6, w7 eor v0.16b, v0.16b, cbciv.16b /* xor with iv => pt */ mov cbciv.16b, v1.16b /* ct is next iv */ st1 {v0.16b}, [x0], #16 subs w4, w4, #1 bne .Lcbcdecloop .Lcbcdecout: st1 {cbciv.16b}, [x5] /* return iv */ ldp x29, x30, [sp], #16 ret AES_ENDPROC(aes_cbc_decrypt) AES_ENDPROC(aes_essiv_cbc_decrypt) /* * aes_cbc_cts_encrypt(u8 out[], u8 const in[], u32 const rk[], * int rounds, int bytes, u8 const iv[]) * aes_cbc_cts_decrypt(u8 out[], u8 const in[], u32 const rk[], * int rounds, int bytes, u8 const iv[]) */ AES_ENTRY(aes_cbc_cts_encrypt) adr_l x8, .Lcts_permute_table sub x4, x4, #16 add x9, x8, #32 add x8, x8, x4 sub x9, x9, x4 ld1 {v3.16b}, [x8] ld1 {v4.16b}, [x9] ld1 {v0.16b}, [x1], x4 /* overlapping loads */ ld1 {v1.16b}, [x1] ld1 {v5.16b}, [x5] /* get iv */ enc_prepare w3, x2, x6 eor v0.16b, v0.16b, v5.16b /* xor with iv */ tbl v1.16b, {v1.16b}, v4.16b encrypt_block v0, w3, x2, x6, w7 eor v1.16b, v1.16b, v0.16b tbl v0.16b, {v0.16b}, v3.16b encrypt_block v1, w3, x2, x6, w7 add x4, x0, x4 st1 {v0.16b}, [x4] /* overlapping stores */ st1 {v1.16b}, [x0] ret AES_ENDPROC(aes_cbc_cts_encrypt) AES_ENTRY(aes_cbc_cts_decrypt) adr_l x8, .Lcts_permute_table sub x4, x4, #16 add x9, x8, #32 add x8, x8, x4 sub x9, x9, x4 ld1 {v3.16b}, [x8] ld1 {v4.16b}, [x9] ld1 {v0.16b}, [x1], x4 /* overlapping loads */ ld1 {v1.16b}, [x1] ld1 {v5.16b}, [x5] /* get iv */ dec_prepare w3, x2, x6 decrypt_block v0, w3, x2, x6, w7 tbl v2.16b, {v0.16b}, v3.16b eor v2.16b, v2.16b, v1.16b tbx v0.16b, {v1.16b}, v4.16b decrypt_block v0, w3, x2, x6, w7 eor v0.16b, v0.16b, v5.16b /* xor with iv */ add x4, x0, x4 st1 {v2.16b}, [x4] /* overlapping stores */ st1 {v0.16b}, [x0] ret AES_ENDPROC(aes_cbc_cts_decrypt) .section ".rodata", "a" .align 6 .Lcts_permute_table: .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7 .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .previous /* * aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 ctr[]) */ AES_ENTRY(aes_ctr_encrypt) stp x29, x30, [sp, #-16]! mov x29, sp enc_prepare w3, x2, x6 ld1 {vctr.16b}, [x5] umov x6, vctr.d[1] /* keep swabbed ctr in reg */ rev x6, x6 cmn w6, w4 /* 32 bit overflow? */ bcs .Lctrloop .LctrloopNx: subs w4, w4, #MAX_STRIDE bmi .Lctr1x add w7, w6, #1 mov v0.16b, vctr.16b add w8, w6, #2 mov v1.16b, vctr.16b add w9, w6, #3 mov v2.16b, vctr.16b add w9, w6, #3 rev w7, w7 mov v3.16b, vctr.16b rev w8, w8 ST5( mov v4.16b, vctr.16b ) mov v1.s[3], w7 rev w9, w9 ST5( add w10, w6, #4 ) mov v2.s[3], w8 ST5( rev w10, w10 ) mov v3.s[3], w9 ST5( mov v4.s[3], w10 ) ld1 {v5.16b-v7.16b}, [x1], #48 /* get 3 input blocks */ ST4( bl aes_encrypt_block4x ) ST5( bl aes_encrypt_block5x ) eor v0.16b, v5.16b, v0.16b ST4( ld1 {v5.16b}, [x1], #16 ) eor v1.16b, v6.16b, v1.16b ST5( ld1 {v5.16b-v6.16b}, [x1], #32 ) eor v2.16b, v7.16b, v2.16b eor v3.16b, v5.16b, v3.16b ST5( eor v4.16b, v6.16b, v4.16b ) st1 {v0.16b-v3.16b}, [x0], #64 ST5( st1 {v4.16b}, [x0], #16 ) add x6, x6, #MAX_STRIDE rev x7, x6 ins vctr.d[1], x7 cbz w4, .Lctrout b .LctrloopNx .Lctr1x: adds w4, w4, #MAX_STRIDE beq .Lctrout .Lctrloop: mov v0.16b, vctr.16b encrypt_block v0, w3, x2, x8, w7 adds x6, x6, #1 /* increment BE ctr */ rev x7, x6 ins vctr.d[1], x7 bcs .Lctrcarry /* overflow? */ .Lctrcarrydone: subs w4, w4, #1 bmi .Lctrtailblock /* blocks <0 means tail block */ ld1 {v3.16b}, [x1], #16 eor v3.16b, v0.16b, v3.16b st1 {v3.16b}, [x0], #16 bne .Lctrloop .Lctrout: st1 {vctr.16b}, [x5] /* return next CTR value */ ldp x29, x30, [sp], #16 ret .Lctrtailblock: st1 {v0.16b}, [x0] b .Lctrout .Lctrcarry: umov x7, vctr.d[0] /* load upper word of ctr */ rev x7, x7 /* ... to handle the carry */ add x7, x7, #1 rev x7, x7 ins vctr.d[0], x7 b .Lctrcarrydone AES_ENDPROC(aes_ctr_encrypt) /* * aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds, * int bytes, u8 const rk2[], u8 iv[], int first) * aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds, * int bytes, u8 const rk2[], u8 iv[], int first) */ .macro next_tweak, out, in, tmp sshr \tmp\().2d, \in\().2d, #63 and \tmp\().16b, \tmp\().16b, xtsmask.16b add \out\().2d, \in\().2d, \in\().2d ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8 eor \out\().16b, \out\().16b, \tmp\().16b .endm .macro xts_load_mask, tmp movi xtsmask.2s, #0x1 movi \tmp\().2s, #0x87 uzp1 xtsmask.4s, xtsmask.4s, \tmp\().4s .endm AES_ENTRY(aes_xts_encrypt) stp x29, x30, [sp, #-16]! mov x29, sp ld1 {v4.16b}, [x6] xts_load_mask v8 cbz w7, .Lxtsencnotfirst enc_prepare w3, x5, x8 xts_cts_skip_tw w7, .LxtsencNx encrypt_block v4, w3, x5, x8, w7 /* first tweak */ enc_switch_key w3, x2, x8 b .LxtsencNx .Lxtsencnotfirst: enc_prepare w3, x2, x8 .LxtsencloopNx: next_tweak v4, v4, v8 .LxtsencNx: subs w4, w4, #64 bmi .Lxtsenc1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */ next_tweak v5, v4, v8 eor v0.16b, v0.16b, v4.16b next_tweak v6, v5, v8 eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b next_tweak v7, v6, v8 eor v3.16b, v3.16b, v7.16b bl aes_encrypt_block4x eor v3.16b, v3.16b, v7.16b eor v0.16b, v0.16b, v4.16b eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b st1 {v0.16b-v3.16b}, [x0], #64 mov v4.16b, v7.16b cbz w4, .Lxtsencret xts_reload_mask v8 b .LxtsencloopNx .Lxtsenc1x: adds w4, w4, #64 beq .Lxtsencout subs w4, w4, #16 bmi .LxtsencctsNx .Lxtsencloop: ld1 {v0.16b}, [x1], #16 .Lxtsencctsout: eor v0.16b, v0.16b, v4.16b encrypt_block v0, w3, x2, x8, w7 eor v0.16b, v0.16b, v4.16b cbz w4, .Lxtsencout subs w4, w4, #16 next_tweak v4, v4, v8 bmi .Lxtsenccts st1 {v0.16b}, [x0], #16 b .Lxtsencloop .Lxtsencout: st1 {v0.16b}, [x0] .Lxtsencret: st1 {v4.16b}, [x6] ldp x29, x30, [sp], #16 ret .LxtsencctsNx: mov v0.16b, v3.16b sub x0, x0, #16 .Lxtsenccts: adr_l x8, .Lcts_permute_table add x1, x1, w4, sxtw /* rewind input pointer */ add w4, w4, #16 /* # bytes in final block */ add x9, x8, #32 add x8, x8, x4 sub x9, x9, x4 add x4, x0, x4 /* output address of final block */ ld1 {v1.16b}, [x1] /* load final block */ ld1 {v2.16b}, [x8] ld1 {v3.16b}, [x9] tbl v2.16b, {v0.16b}, v2.16b tbx v0.16b, {v1.16b}, v3.16b st1 {v2.16b}, [x4] /* overlapping stores */ mov w4, wzr b .Lxtsencctsout AES_ENDPROC(aes_xts_encrypt) AES_ENTRY(aes_xts_decrypt) stp x29, x30, [sp, #-16]! mov x29, sp /* subtract 16 bytes if we are doing CTS */ sub w8, w4, #0x10 tst w4, #0xf csel w4, w4, w8, eq ld1 {v4.16b}, [x6] xts_load_mask v8 xts_cts_skip_tw w7, .Lxtsdecskiptw cbz w7, .Lxtsdecnotfirst enc_prepare w3, x5, x8 encrypt_block v4, w3, x5, x8, w7 /* first tweak */ .Lxtsdecskiptw: dec_prepare w3, x2, x8 b .LxtsdecNx .Lxtsdecnotfirst: dec_prepare w3, x2, x8 .LxtsdecloopNx: next_tweak v4, v4, v8 .LxtsdecNx: subs w4, w4, #64 bmi .Lxtsdec1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ next_tweak v5, v4, v8 eor v0.16b, v0.16b, v4.16b next_tweak v6, v5, v8 eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b next_tweak v7, v6, v8 eor v3.16b, v3.16b, v7.16b bl aes_decrypt_block4x eor v3.16b, v3.16b, v7.16b eor v0.16b, v0.16b, v4.16b eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b st1 {v0.16b-v3.16b}, [x0], #64 mov v4.16b, v7.16b cbz w4, .Lxtsdecout xts_reload_mask v8 b .LxtsdecloopNx .Lxtsdec1x: adds w4, w4, #64 beq .Lxtsdecout subs w4, w4, #16 .Lxtsdecloop: ld1 {v0.16b}, [x1], #16 bmi .Lxtsdeccts .Lxtsdecctsout: eor v0.16b, v0.16b, v4.16b decrypt_block v0, w3, x2, x8, w7 eor v0.16b, v0.16b, v4.16b st1 {v0.16b}, [x0], #16 cbz w4, .Lxtsdecout subs w4, w4, #16 next_tweak v4, v4, v8 b .Lxtsdecloop .Lxtsdecout: st1 {v4.16b}, [x6] ldp x29, x30, [sp], #16 ret .Lxtsdeccts: adr_l x8, .Lcts_permute_table add x1, x1, w4, sxtw /* rewind input pointer */ add w4, w4, #16 /* # bytes in final block */ add x9, x8, #32 add x8, x8, x4 sub x9, x9, x4 add x4, x0, x4 /* output address of final block */ next_tweak v5, v4, v8 ld1 {v1.16b}, [x1] /* load final block */ ld1 {v2.16b}, [x8] ld1 {v3.16b}, [x9] eor v0.16b, v0.16b, v5.16b decrypt_block v0, w3, x2, x8, w7 eor v0.16b, v0.16b, v5.16b tbl v2.16b, {v0.16b}, v2.16b tbx v0.16b, {v1.16b}, v3.16b st1 {v2.16b}, [x4] /* overlapping stores */ mov w4, wzr b .Lxtsdecctsout AES_ENDPROC(aes_xts_decrypt) /* * aes_mac_update(u8 const in[], u32 const rk[], int rounds, * int blocks, u8 dg[], int enc_before, int enc_after) */ AES_ENTRY(aes_mac_update) frame_push 6 mov x19, x0 mov x20, x1 mov x21, x2 mov x22, x3 mov x23, x4 mov x24, x6 ld1 {v0.16b}, [x23] /* get dg */ enc_prepare w2, x1, x7 cbz w5, .Lmacloop4x encrypt_block v0, w2, x1, x7, w8 .Lmacloop4x: subs w22, w22, #4 bmi .Lmac1x ld1 {v1.16b-v4.16b}, [x19], #64 /* get next pt block */ eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */ encrypt_block v0, w21, x20, x7, w8 eor v0.16b, v0.16b, v2.16b encrypt_block v0, w21, x20, x7, w8 eor v0.16b, v0.16b, v3.16b encrypt_block v0, w21, x20, x7, w8 eor v0.16b, v0.16b, v4.16b cmp w22, wzr csinv x5, x24, xzr, eq cbz w5, .Lmacout encrypt_block v0, w21, x20, x7, w8 st1 {v0.16b}, [x23] /* return dg */ cond_yield_neon .Lmacrestart b .Lmacloop4x .Lmac1x: add w22, w22, #4 .Lmacloop: cbz w22, .Lmacout ld1 {v1.16b}, [x19], #16 /* get next pt block */ eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */ subs w22, w22, #1 csinv x5, x24, xzr, eq cbz w5, .Lmacout .Lmacenc: encrypt_block v0, w21, x20, x7, w8 b .Lmacloop .Lmacout: st1 {v0.16b}, [x23] /* return dg */ frame_pop ret .Lmacrestart: ld1 {v0.16b}, [x23] /* get dg */ enc_prepare w21, x20, x0 b .Lmacloop4x AES_ENDPROC(aes_mac_update) |