crypto: x86/chacha20 - Support partial lengths in 8-block AVX2 variant

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Add a length argument to the eight block function for AVX2, so the
block function may XOR only a partial length of eight blocks.

To avoid unnecessary operations, we integrate XORing of the first four
blocks in the final lane interleaving; this also avoids some work in
the partial lengths path.

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Martin Willi 2018-11-11 10:36:27 +01:00 • committed by Herbert Xu

parent db8e15a249

commit c3b734dd32

2 changed files with 133 additions and 61 deletions

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195

arch/x86/crypto/chacha20-avx2-x86_64.S

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5

arch/x86/crypto/chacha20_glue.c

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