SHA-256: Add SSSE3 implementation for x86-64
* cipher/Makefile.am: Add 'sha256-ssse3-amd64.S'. * cipher/sha256-ssse3-amd64.S: New. * cipher/sha256.c (USE_SSSE3): New. (SHA256_CONTEXT) [USE_SSSE3]: Add 'use_ssse3'. (sha256_init, sha224_init) [USE_SSSE3]: Initialize 'use_ssse3'. (transform): Rename to... (_transform): This. [USE_SSSE3] (_gcry_sha256_transform_amd64_ssse3): New. (transform): New. * configure.ac (HAVE_INTEL_SYNTAX_PLATFORM_AS): New check. (sha256): Add 'sha256-ssse3-amd64.lo'. * doc/gcrypt.texi: Document 'intel-ssse3'. * src/g10lib.h (HWF_INTEL_SSSE3): New. * src/hwfeatures.c (hwflist): Add "intel-ssse3". * src/hwf-x86.c (detect_x86_gnuc): Test for SSSE3.
Patch adds fast SSSE3 implementation of SHA-256 by Intel Corporation. The
assembly source is licensed under 3-clause BSD license, thus compatible
with LGPL2.1+. Original source can be accessed at:
http://www.intel.com/p/en_US/embedded/hwsw/technology/packet-processing#docs
Implementation is described in white paper
"Fast SHA - 256 Implementations on Intel® Architecture Processors"
http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/sha-256-implementations-paper.html
Benchmarks:
cpu Old New Diff
Intel i5-4570 13.99 c/B 10.66 c/B 1.31x
Intel i5-2450M 21.53 c/B 15.79 c/B 1.36x
Intel Core2 T8100 20.84 c/B 15.07 c/B 1.38x
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>