path: root/crypto
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authorJussi Kivilinna <>2012-08-28 14:24:54 +0300
committerHerbert Xu <>2012-09-07 04:17:05 +0800
commitc09220e1bc97d83cae445cab8dcb057fabd62361 (patch)
tree2f7a80b98592630c28350ebe4cb0f3be616cc8f8 /crypto
parentddaea7869d29beb9e0042c96ea52c9cca2afd68a (diff)
crypto: cast6-avx - tune assembler code for more performance
Patch replaces 'movb' instructions with 'movzbl' to break false register dependencies, interleaves instructions better for out-of-order scheduling and merges constant 16-bit rotation with round-key variable rotation. tcrypt ECB results: Intel Core i5-2450M: size old-vs-new new-vs-generic old-vs-generic enc dec enc dec enc dec 256 1.13x 1.19x 2.05x 2.17x 1.82x 1.82x 1k 1.18x 1.21x 2.26x 2.33x 1.93x 1.93x 8k 1.19x 1.19x 2.32x 2.33x 1.95x 1.95x [v2] - Do instruction interleaving another way to avoid adding new FPU<=>CPU register moves as these cause performance drop on Bulldozer. - Improvements to round-key variable rotation handling. - Further interleaving improvements for better out-of-order scheduling. Cc: Johannes Goetzfried <> Signed-off-by: Jussi Kivilinna <> Signed-off-by: Herbert Xu <>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions