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098b9dd468
Since the AVX2 version of mathvec functions uses FMA, it can only be used when FMA is usable. [BZ #21966] * sysdeps/x86_64/fpu/multiarch/ifunc-mathvec-avx2.h (IFUNC_SELECTOR): Don't use the AVX2 version if FMA isn't usable.
40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/* Common definition for libmathvec ifunc selections optimized with
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AVX2.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <init-arch.h>
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#undef PASTER2
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#define PASTER2(x,y) x##_##y
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extern void REDIRECT_NAME (void);
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extern __typeof (REDIRECT_NAME) OPTIMIZE (sse_wrapper) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
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static inline void *
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IFUNC_SELECTOR (void)
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{
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const struct cpu_features* cpu_features = __get_cpu_features ();
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if (CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable)
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&& CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable))
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return OPTIMIZE (avx2);
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return OPTIMIZE (sse_wrapper);
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}
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