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When glibc is built with ISA level 3 or higher by default, the resulting glibc binaries won't run on SSE or FMA4 processors. Exclude SSE, AVX and FMA4 variants in libm multiarch when ISA level 3 or higher is enabled by default. When glibc is built with ISA level 2 enabled by default, only keep SSE4.1 variant. Fixes BZ 31335. NB: elf/tst-valgrind-smoke test fails with ISA level 4, because valgrind doesn't support AVX512 instructions: https://bugs.kde.org/show_bug.cgi?id=383010 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* Multiple versions of exp2f.
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Copyright (C) 2017-2024 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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<https://www.gnu.org/licenses/>. */
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#include <sysdeps/x86/isa-level.h>
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#if MINIMUM_X86_ISA_LEVEL < AVX2_X86_ISA_LEVEL
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# include <libm-alias-float.h>
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# include <libm-alias-finite.h>
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extern float __redirect_exp2f (float);
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# define SYMBOL_NAME exp2f
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# include "ifunc-fma.h"
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libc_ifunc_redirected (__redirect_exp2f, __exp2f, IFUNC_SELECTOR ());
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# ifdef SHARED
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versioned_symbol (libm, __ieee754_exp2f, exp2f, GLIBC_2_27);
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libm_alias_float_other (__exp2, exp2)
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# else
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libm_alias_float (__exp2, exp2)
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# endif
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strong_alias (__exp2f, __ieee754_exp2f)
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libm_alias_finite (__exp2f, __exp2f)
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# define __exp2f __exp2f_sse2
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#endif
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#include <sysdeps/ieee754/flt-32/e_exp2f.c>
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