Tweak AES-NI bulk CTR mode slightly

* cipher/rijndael.c [USE_AESNI] (aesni_cleanup_2_5): Rename to...
(aesni_cleanup_2_6): ...this and clear also 'xmm6'.
[USE_AESNI && __i386__] (do_aesni_ctr, do_aesni_ctr_4): Prevent
inlining only on i386, allow on AMD64.
[USE_AESNI] (do_aesni_ctr, do_aesni_ctr_4): Use counter block from
'xmm5' and byte-swap mask from 'xmm6'.
(_gcry_aes_ctr_enc) [USE_AESNI]: Preload counter block to 'xmm5' and
byte-swap mask to 'xmm6'.
(_gcry_aes_ctr_enc, _gcry_aes_cfb_dec, _gcry_aes_cbc_dec): Use
'aesni_cleanup_2_6'.
--

Small tweak that yeilds ~5% more speed on Intel Core i5-4570.

After:
 AES            |  nanosecs/byte   mebibytes/sec   cycles/byte
        CTR enc |     0.274 ns/B    3482.5 MiB/s     0.877 c/B
        CTR dec |     0.274 ns/B    3486.8 MiB/s     0.876 c/B

Before:
 AES            |  nanosecs/byte   mebibytes/sec   cycles/byte
        CTR enc |     0.288 ns/B    3312.5 MiB/s     0.922 c/B
        CTR dec |     0.288 ns/B    3312.6 MiB/s     0.922 c/B

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

0 files changed, 0 insertions, 0 deletions