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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-06-09 16:37:38 +0300 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-06-09 16:37:42 +0300 |
| commit | 3289bca708bdd02c69a331095ac6ca9a1efd74cc (patch) | |
| tree | 6bbf91993a4566d7c018fa0ee20751d3ed2e7c0a /configure.ac | |
| parent | d325ab5d86e6107a46007a4d0131122bbd719f8c (diff) | |
| download | libgcrypt-3289bca708bdd02c69a331095ac6ca9a1efd74cc.tar.gz | |
Add detection for Intel AVX2 instruction set
* configure.ac: Add option --disable-avx2-support.
(HAVE_GCC_INLINE_ASM_AVX2): New.
(ENABLE_AVX2_SUPPORT): New.
* src/g10lib.h (HWF_INTEL_AVX2): New.
* src/global.c (hwflist): Add HWF_INTEL_AVX2.
* src/hwf-x86.c [__i386__] (get_cpuid): Initialize registers to zero
before cpuid.
[__x86_64__] (get_cpuid): Initialize registers to zero before cpuid.
(detect_x86_gnuc): Store maximum cpuid level.
(detect_x86_gnuc) [ENABLE_AVX2_SUPPORT]: Add detection for AVX2.
--
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 8cb980c4..7fc7935c 100644 --- a/configure.ac +++ b/configure.ac @@ -594,6 +594,14 @@ AC_ARG_ENABLE(avx-support, avxsupport=$enableval,avxsupport=yes) AC_MSG_RESULT($avxsupport) +# Implementation of the --disable-avx2-support switch. +AC_MSG_CHECKING([whether AVX2 support is requested]) +AC_ARG_ENABLE(avx2-support, + AC_HELP_STRING([--disable-avx2-support], + [Disable support for the Intel AVX2 instructions]), + avx2support=$enableval,avx2support=yes) +AC_MSG_RESULT($avx2support) + # Implementation of the --disable-O-flag-munging switch. AC_MSG_CHECKING([whether a -O flag munging is requested]) AC_ARG_ENABLE([O-flag-munging], @@ -916,6 +924,23 @@ if test "$gcry_cv_gcc_inline_asm_avx" = "yes" ; then fi +# +# Check whether GCC inline assembler supports AVX2 instructions +# +AC_CACHE_CHECK([whether GCC inline assembler supports AVX2 instructions], + [gcry_cv_gcc_inline_asm_avx2], + [gcry_cv_gcc_inline_asm_avx2=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[void a(void) { + __asm__("vpbroadcastb %%xmm7,%%ymm1\n\t":::); + }]])], + [gcry_cv_gcc_inline_asm_avx2=yes])]) +if test "$gcry_cv_gcc_inline_asm_avx2" = "yes" ; then + AC_DEFINE(HAVE_GCC_INLINE_ASM_AVX2,1, + [Defined if inline assembler supports AVX2 instructions]) +fi + + ####################################### #### Checks for library functions. #### ####################################### @@ -1165,6 +1190,11 @@ if test x"$avxsupport" = xyes ; then avxsupport="no (unsupported by compiler)" fi fi +if test x"$avx2support" = xyes ; then + if test "$gcry_cv_gcc_inline_asm_avx2" != "yes" ; then + avx2support="no (unsupported by compiler)" + fi +fi if test x"$aesnisupport" = xyes ; then AC_DEFINE(ENABLE_AESNI_SUPPORT, 1, @@ -1174,6 +1204,10 @@ if test x"$avxsupport" = xyes ; then AC_DEFINE(ENABLE_AVX_SUPPORT,1, [Enable support for Intel AVX instructions.]) fi +if test x"$avx2support" = xyes ; then + AC_DEFINE(ENABLE_AVX2_SUPPORT,1, + [Enable support for Intel AVX2 instructions.]) +fi # Define conditional sources and config.h symbols depending on the @@ -1513,6 +1547,7 @@ GCRY_MSG_SHOW([Try using Padlock crypto: ],[$padlocksupport]) GCRY_MSG_SHOW([Try using AES-NI crypto: ],[$aesnisupport]) GCRY_MSG_SHOW([Try using DRNG (RDRAND): ],[$drngsupport]) GCRY_MSG_SHOW([Try using Intel AVX: ],[$avxsupport]) +GCRY_MSG_SHOW([Try using Intel AVX2: ],[$avx2support]) GCRY_MSG_SHOW([],[]) if test "$print_egd_notice" = "yes"; then |