The current arm64 CRC-T10DIF code only runs on cores that implement the 64x64 bit PMULL instructions that are part of the optional Crypto Extensions, and falls back to the highly inefficient C code otherwise. Let's provide a SIMD version that is twice as fast as the C code even on a low end core like the Cortex-A53, and is time invariant and much easier on the D-cache. Some performance numbers at the bottom. Ard Biesheuvel (2): crypto: arm64/crct10dif - preparatory refactor for 8x8 PMULL version crypto: arm64/crct10dif - implement non-Crypto Extensions alternative arch/arm64/crypto/crct10dif-ce-core.S | 314 +++++++++++++++----- arch/arm64/crypto/crct10dif-ce-glue.c | 14 +- 2 files changed, 251 insertions(+), 77 deletions(-) -- 2.18.0 tcrypto speed tests on a 1 GHz Cortex-A53: C version ========= 0 ( 16 byte blocks, 16 bytes x 1): 3302652 opers/sec, 52842432 Bps 1 ( 64 byte blocks, 16 bytes x 4): 612125 opers/sec, 39176000 Bps 2 ( 64 byte blocks, 64 bytes x 1): 1272473 opers/sec, 81438272 Bps 3 ( 256 byte blocks, 16 bytes x 16): 162127 opers/sec, 41504512 Bps 4 ( 256 byte blocks, 64 bytes x 4): 280237 opers/sec, 71740672 Bps 5 ( 256 byte blocks, 256 bytes x 1): 367349 opers/sec, 94041344 Bps 6 ( 1024 byte blocks, 16 bytes x 64): 41142 opers/sec, 42129408 Bps 7 ( 1024 byte blocks, 256 bytes x 4): 88099 opers/sec, 90213376 Bps 8 ( 1024 byte blocks, 1024 bytes x 1): 95455 opers/sec, 97745920 Bps 9 ( 2048 byte blocks, 16 bytes x 128): 20622 opers/sec, 42233856 Bps 10 ( 2048 byte blocks, 256 bytes x 8): 44421 opers/sec, 90974208 Bps 11 ( 2048 byte blocks, 1024 bytes x 2): 47158 opers/sec, 96579584 Bps 12 ( 2048 byte blocks, 2048 bytes x 1): 48095 opers/sec, 98498560 Bps 13 ( 4096 byte blocks, 16 bytes x 256): 10318 opers/sec, 42262528 Bps 14 ( 4096 byte blocks, 256 bytes x 16): 22265 opers/sec, 91197440 Bps 15 ( 4096 byte blocks, 1024 bytes x 4): 23639 opers/sec, 96825344 Bps 16 ( 4096 byte blocks, 4096 bytes x 1): 24032 opers/sec, 98435072 Bps 17 ( 8192 byte blocks, 16 bytes x 512): 5167 opers/sec, 42328064 Bps 18 ( 8192 byte blocks, 256 bytes x 32): 11152 opers/sec, 91357184 Bps 19 ( 8192 byte blocks, 1024 bytes x 8): 11836 opers/sec, 96960512 Bps 20 ( 8192 byte blocks, 4096 bytes x 2): 12006 opers/sec, 98353152 Bps 21 ( 8192 byte blocks, 8192 bytes x 1): 12031 opers/sec, 98557952 Bps PMULL 64x64 version ==================== 0 ( 16 byte blocks, 16 bytes x 1): 1663221 opers/sec, 26611536 Bps 1 ( 64 byte blocks, 16 bytes x 4): 496141 opers/sec, 31753024 Bps 2 ( 64 byte blocks, 64 bytes x 1): 1553169 opers/sec, 99402816 Bps 3 ( 256 byte blocks, 16 bytes x 16): 132224 opers/sec, 33849344 Bps 4 ( 256 byte blocks, 64 bytes x 4): 458027 opers/sec, 117254912 Bps 5 ( 256 byte blocks, 256 bytes x 1): 1353682 opers/sec, 346542592 Bps 6 ( 1024 byte blocks, 16 bytes x 64): 33557 opers/sec, 34362368 Bps 7 ( 1024 byte blocks, 256 bytes x 4): 390226 opers/sec, 399591424 Bps 8 ( 1024 byte blocks, 1024 bytes x 1): 832879 opers/sec, 852868096 Bps 9 ( 2048 byte blocks, 16 bytes x 128): 16853 opers/sec, 34514944 Bps 10 ( 2048 byte blocks, 256 bytes x 8): 201626 opers/sec, 412930048 Bps 11 ( 2048 byte blocks, 1024 bytes x 2): 437117 opers/sec, 895215616 Bps 12 ( 2048 byte blocks, 2048 bytes x 1): 553689 opers/sec, 1133955072 Bps 13 ( 4096 byte blocks, 16 bytes x 256): 8438 opers/sec, 34562048 Bps 14 ( 4096 byte blocks, 256 bytes x 16): 102551 opers/sec, 420048896 Bps 15 ( 4096 byte blocks, 1024 bytes x 4): 226754 opers/sec, 928784384 Bps 16 ( 4096 byte blocks, 4096 bytes x 1): 323362 opers/sec, 1324490752 Bps 17 ( 8192 byte blocks, 16 bytes x 512): 4222 opers/sec, 34586624 Bps 18 ( 8192 byte blocks, 256 bytes x 32): 51709 opers/sec, 423600128 Bps 19 ( 8192 byte blocks, 1024 bytes x 8): 115508 opers/sec, 946241536 Bps 20 ( 8192 byte blocks, 4096 bytes x 2): 169015 opers/sec, 1384570880 Bps 21 ( 8192 byte blocks, 8192 bytes x 1): 168734 opers/sec, 1382268928 Bps PMULL 8x8 version ================= testing speed of async crct10dif (crct10dif-arm64-ce) 0 ( 16 byte blocks, 16 bytes x 1): 1281627 opers/sec, 20506032 Bps 1 ( 64 byte blocks, 16 bytes x 4): 351733 opers/sec, 22510912 Bps 2 ( 64 byte blocks, 64 bytes x 1): 959314 opers/sec, 61396096 Bps 3 ( 256 byte blocks, 16 bytes x 16): 91002 opers/sec, 23296512 Bps 4 ( 256 byte blocks, 64 bytes x 4): 256833 opers/sec, 65749248 Bps 5 ( 256 byte blocks, 256 bytes x 1): 490696 opers/sec, 125618176 Bps 6 ( 1024 byte blocks, 16 bytes x 64): 22952 opers/sec, 23502848 Bps 7 ( 1024 byte blocks, 256 bytes x 4): 127006 opers/sec, 130054144 Bps 8 ( 1024 byte blocks, 1024 bytes x 1): 168461 opers/sec, 172504064 Bps 9 ( 2048 byte blocks, 16 bytes x 128): 11496 opers/sec, 23543808 Bps 10 ( 2048 byte blocks, 256 bytes x 8): 64000 opers/sec, 131072000 Bps 11 ( 2048 byte blocks, 1024 bytes x 2): 84752 opers/sec, 173572096 Bps 12 ( 2048 byte blocks, 2048 bytes x 1): 89919 opers/sec, 184154112 Bps 13 ( 4096 byte blocks, 16 bytes x 256): 5757 opers/sec, 23580672 Bps 14 ( 4096 byte blocks, 256 bytes x 16): 32129 opers/sec, 131600384 Bps 15 ( 4096 byte blocks, 1024 bytes x 4): 42608 opers/sec, 174522368 Bps 16 ( 4096 byte blocks, 4096 bytes x 1): 46351 opers/sec, 189853696 Bps 17 ( 8192 byte blocks, 16 bytes x 512): 2884 opers/sec, 23625728 Bps 18 ( 8192 byte blocks, 256 bytes x 32): 16105 opers/sec, 131932160 Bps 19 ( 8192 byte blocks, 1024 bytes x 8): 21364 opers/sec, 175013888 Bps 20 ( 8192 byte blocks, 4096 bytes x 2): 23299 opers/sec, 190865408 Bps 21 ( 8192 byte blocks, 8192 bytes x 1): 23292 opers/sec, 190808064 Bps
