twofish: add amd64 assembly implementation
* cipher/Makefile.am: Add 'twofish-amd64.S'. * cipher/twofish-amd64.S: New file. * cipher/twofish.c (USE_AMD64_ASM): New macro. [USE_AMD64_ASM] (_gcry_twofish_amd64_encrypt_block) (_gcry_twofish_amd64_decrypt_block, _gcry_twofish_amd64_ctr_enc) (_gcry_twofish_amd64_cbc_dec, _gcry_twofish_amd64_cfb_dec): New prototypes. [USE_AMD64_ASM] (do_twofish_encrypt, do_twofish_decrypt) (twofish_encrypt, twofish_decrypt): New functions. (_gcry_twofish_ctr_enc, _gcry_twofish_cbc_dec, _gcry_twofish_cfb_dec) (selftest_ctr, selftest_cbc, selftest_cfb): New functions. (selftest): Call new bulk selftests. * cipher/cipher.c (gcry_cipher_open) [USE_TWOFISH]: Register Twofish bulk functions for ctr-enc, cbc-dec and cfb-dec. * configure.ac (twofish) [x86_64]: Add 'twofish-amd64.lo'. * src/cipher.h (_gcry_twofish_ctr_enc, _gcry_twofish_cbc_dec) (gcry_twofish_cfb_dec): New prototypes.
Provides non-parallel implementations for small speed-up and 3-way parallel
implementations that gets accelerated on `out-of-order' CPUs.
Speed old vs. new on Intel Core i5-4570:
ECB/Stream CBC CFB OFB CTR --------------- --------------- --------------- --------------- ---------------
TWOFISH128 1.08x 1.07x 1.10x 1.80x 1.09x 1.70x 1.08x 1.08x 1.70x 1.69x
Speed old vs. new on Intel Core2 T8100:
ECB/Stream CBC CFB OFB CTR --------------- --------------- --------------- --------------- ---------------
TWOFISH128 1.11x 1.10x 1.13x 1.65x 1.13x 1.62x 1.12x 1.11x 1.63x 1.59x
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>