crypto: twofish/avx - avoid using temporary stack buffers

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Introduce new assembler functions to avoid use temporary stack buffers in glue
code. This also allows use of vector instructions for xoring output in CTR and
CBC modes and construction of IVs for CTR mode.

ECB mode sees ~0.2% decrease in speed because added one extra function
call. CBC mode decryption and CTR mode benefit from vector operations
and gain ~3%.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Jussi Kivilinna 2012-10-20 15:06:46 +03:00 • committed by Herbert Xu

parent cba1cce054

commit 8435a3c300

2 changed files with 152 additions and 129 deletions

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208

arch/x86/crypto/twofish-avx-x86_64-asm_64.S

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77

arch/x86/crypto/twofish_avx_glue.c

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