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Merge old compiler detection with AVX512f support detection

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Maybe
fixes #786
This commit is contained in:
Frank Denis 2018-11-30 15:18:52 +01:00
parent a1dff41891
commit 762e5136ed
1 changed files with 17 additions and 16 deletions
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33
configure.ac
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@ -330,21 +330,6 @@ AX_CHECK_LINK_FLAG([-Wl,-z,relro], [LDFLAGS="$LDFLAGS -Wl,-z,relro"])
AX_CHECK_LINK_FLAG([-Wl,-z,now], [LDFLAGS="$LDFLAGS -Wl,-z,now"])
AX_CHECK_LINK_FLAG([-Wl,-z,noexecstack], [LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"])
AC_MSG_CHECKING(for obsolete compiler with possibly broken AVX512 support)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
#if !(defined(__AVX512F__) && \
((defined(__clang__) && __clang_major__ < 4) || \
(defined(__GNUC__) && __GNUC__ < 6)))
#error Compiler should properly support AVX512 opcodes
#endif
]])],
[AC_MSG_RESULT(yes - disabling AVX512 optimizations)
AX_CHECK_COMPILE_FLAG([$CFLAGS -mno-avx512f],
[CFLAGS="$CFLAGS -mno-avx512f"])
],
[AC_MSG_RESULT(no)
])
AX_CHECK_CATCHABLE_SEGV
AX_CHECK_CATCHABLE_ABRT
@ -491,13 +476,29 @@ return _mm256_movemask_ps(_mm256_cmp_ps(x, y, _CMP_NEQ_OQ));
#pragma GCC target("avx512f")
#include <immintrin.h>
]], [[
#ifndef __AVX512F__
# error No AVX512 support
#elif defined(__clang__)
# if __clang_major__ < 4
# error Compiler AVX512 support may be broken
# endif
#elif defined(__GNUC__)
# if __GNUC__ < 6
# error Compiler AVX512 support may be broken
# endif
#endif
__m512i x = _mm512_setzero_epi32();
__m512i y = _mm512_permutexvar_epi64(_mm512_setr_epi64(0, 1, 4, 5, 2, 3, 6, 7), x);
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_AVX512FINTRIN_H], [1], [AVX512F is available])
AX_CHECK_COMPILE_FLAG([-mavx512f], [CFLAGS_AVX512F="-mavx512f"])],
[AC_MSG_RESULT(no)])
[AC_MSG_RESULT(no)
AX_CHECK_COMPILE_FLAG([$CFLAGS -mno-avx512f],
[CFLAGS="$CFLAGS -mno-avx512f"])
])
CFLAGS="$oldcflags"
oldcflags="$CFLAGS"