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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-12-12 13:56:13 +0200 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-12-13 00:13:12 +0200 |
| commit | 2e4253dc8eb512cd0e807360926dc6ba912c95b4 (patch) | |
| tree | 6ea95c8c04aa2593ba8eb5b83ec3ad6b70121918 /configure.ac | |
| parent | 69a6d0f9562fcd26112a589318c13de66ce1700e (diff) | |
| download | libgcrypt-2e4253dc8eb512cd0e807360926dc6ba912c95b4.tar.gz | |
SHA-512: Add AVX and AVX2 implementations for x86-64
* cipher/Makefile.am: Add 'sha512-avx-amd64.S' and
'sha512-avx2-bmi2-amd64.S'.
* cipher/sha512-avx-amd64.S: New.
* cipher/sha512-avx2-bmi2-amd64.S: New.
* cipher/sha512.c (USE_AVX, USE_AVX2): New.
(SHA512_CONTEXT) [USE_AVX]: Add 'use_avx'.
(SHA512_CONTEXT) [USE_AVX2]: Add 'use_avx2'.
(sha512_init, sha384_init) [USE_AVX]: Initialize 'use_avx'.
(sha512_init, sha384_init) [USE_AVX2]: Initialize 'use_avx2'.
[USE_AVX] (_gcry_sha512_transform_amd64_avx): New.
[USE_AVX2] (_gcry_sha512_transform_amd64_avx2): New.
(transform) [USE_AVX2]: Add call for AVX2 implementation.
(transform) [USE_AVX]: Add call for AVX implementation.
* configure.ac (HAVE_GCC_INLINE_ASM_BMI2): New check.
(sha512): Add 'sha512-avx-amd64.lo' and 'sha512-avx2-bmi2-amd64.lo'.
* doc/gcrypt.texi: Document 'intel-cpu' and 'intel-bmi2'.
* src/g10lib.h (HWF_INTEL_CPU, HWF_INTEL_BMI2): New.
* src/hwfeatures.c (hwflist): Add "intel-cpu" and "intel-bmi2".
* src/hwf-x86.c (detect_x86_gnuc): Check for HWF_INTEL_CPU and
HWF_INTEL_BMI2.
--
Patch adds fast AVX and AVX2 implementation of SHA-512 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 SHA512 Implementations on Intel® Architecture Processors"
http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/fast-sha512-implementat$
Note: AVX implementation uses SHLD instruction to emulate RORQ, since it's
faster on Intel Sandy-Bridge. However, on non-Intel CPUs SHLD is much
slower than RORQ, so therefore AVX implementation is (for now) limited
to Intel CPUs.
Note: AVX2 implementation also uses BMI2 instruction rorx, thus additional
HWF flag.
Benchmarks:
cpu Old SSSE3 AVX/AVX2 Old vs AVX/AVX2
vs SSSE3
Intel i5-4570 10.11 c/B 7.56 c/B 6.72 c/B 1.50x 1.12x
Intel i5-2450M 14.11 c/B 10.53 c/B 8.88 c/B 1.58x 1.18x
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 5990429f..bc86956d 100644 --- a/configure.ac +++ b/configure.ac @@ -1050,6 +1050,23 @@ fi # +# Check whether GCC inline assembler supports BMI2 instructions +# +AC_CACHE_CHECK([whether GCC inline assembler supports BMI2 instructions], + [gcry_cv_gcc_inline_asm_bmi2], + [gcry_cv_gcc_inline_asm_bmi2=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[void a(void) { + __asm__("rorxl \$23, %%eax, %%edx\\n\\t":::"memory"); + }]])], + [gcry_cv_gcc_inline_asm_bmi2=yes])]) +if test "$gcry_cv_gcc_inline_asm_bmi2" = "yes" ; then + AC_DEFINE(HAVE_GCC_INLINE_ASM_BMI2,1, + [Defined if inline assembler supports BMI2 instructions]) +fi + + +# # Check whether GCC assembler supports features needed for our amd64 # implementations # @@ -1728,6 +1745,8 @@ if test "$found" = "1" ; then x86_64-*-*) # Build with the assembly implementation GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-ssse3-amd64.lo" + GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx-amd64.lo" + GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx2-bmi2-amd64.lo" ;; esac |