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| author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2012-08-28 14:24:54 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2012-09-07 04:17:05 +0800 |
| commit | c09220e1bc97d83cae445cab8dcb057fabd62361 (patch) | |
| tree | 2f7a80b98592630c28350ebe4cb0f3be616cc8f8 /crypto | |
| parent | ddaea7869d29beb9e0042c96ea52c9cca2afd68a (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 <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions