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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2023-02-25 10:21:57 +0200 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2023-02-26 11:27:18 +0200 |
| commit | 161614ecc1c20d94a8599888524b1d1fd0eb2754 (patch) | |
| tree | b51e9ff494a1523318c15777d95a610987b5a62b /configure.ac | |
| parent | dd4cb5d75c8e4e666db4352d999b2111b9ddb80d (diff) | |
| download | libgcrypt-161614ecc1c20d94a8599888524b1d1fd0eb2754.tar.gz | |
sha2-ppc: better optimization for POWER9
* cipher/sha256-ppc.c: Change to use vector registers, generate
POWER8 and POWER9 from same code with help of 'target' and
'optimize' attribute.
* cipher/sha512-ppc.c: Likewise.
* configure.ac (gcry_cv_gcc_attribute_optimize)
(gcry_cv_gcc_attribute_ppc_target): New.
--
Benchmark on POWER9:
Before:
| nanosecs/byte mebibytes/sec cycles/byte
SHA256 | 5.22 ns/B 182.8 MiB/s 12.00 c/B
SHA512 | 3.53 ns/B 269.9 MiB/s 8.13 c/B
After (sha256 ~12% faster, sha512 ~19% faster):
| nanosecs/byte mebibytes/sec cycles/byte
SHA256 | 4.65 ns/B 204.9 MiB/s 10.71 c/B
SHA512 | 2.97 ns/B 321.1 MiB/s 6.83 c/B
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 75622e50..63f705ea 100644 --- a/configure.ac +++ b/configure.ac @@ -1364,6 +1364,21 @@ CFLAGS="$CFLAGS -Werror" # +# Check whether compiler supports 'optimize' function attribute +# +AC_CACHE_CHECK([whether compiler supports 'optimize' function attribute], + [gcry_cv_gcc_attribute_optimize], + [gcry_cv_gcc_attribute_optimize=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[int __attribute__ ((optimize("-O2"))) fn(int i){return i;}]])], + [gcry_cv_gcc_attribute_optimize=yes])]) +if test "$gcry_cv_gcc_attribute_optimize" = "yes" ; then + AC_DEFINE(HAVE_GCC_ATTRIBUTE_OPTIMIZE,1, + [Defined if compiler supports "__attribute__ ((optimize))" function attribute]) +fi + + +# # Check whether compiler supports 'ms_abi' function attribute. # AC_CACHE_CHECK([whether compiler supports 'ms_abi' function attribute], @@ -2255,6 +2270,28 @@ fi # +# Check whether compiler supports GCC PowerPC target attributes +# +AC_CACHE_CHECK([whether compiler supports GCC PowerPC target attributes], + [gcry_cv_gcc_attribute_ppc_target], + [if test "$mpi_cpu_arch" != "ppc" ; then + gcry_cv_gcc_attribute_ppc_target="n/a" + else + gcry_cv_gcc_attribute_ppc_target=no + AC_LINK_IFELSE([AC_LANG_PROGRAM( + [[void __attribute__((target("cpu=power8"))) testfn8(void) {} + void __attribute__((target("cpu=power9"))) testfn9(void) + { testfn8(); } + ]], [ testfn9(); ])], + [gcry_cv_gcc_attribute_ppc_target=yes]) + fi]) +if test "$gcry_cv_gcc_attribute_ppc_target" = "yes" ; then + AC_DEFINE(HAVE_GCC_ATTRIBUTE_PPC_TARGET,1, + [Defined if compiler supports GCC PowerPC target attributes]) +fi + + +# # Check whether GCC inline assembler supports zSeries instructions # AC_CACHE_CHECK([whether GCC inline assembler supports zSeries instructions], |