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https://sourceware.org/git/glibc.git
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1b214630ce
On Skylake, it improves expm1 bench performance by:
Before After Improvement
max 70.204 68.054 3%
min 20.709 16.2 22%
mean 22.1221 16.7367 24%
NB: Add
extern long double __expm1l (long double);
extern long double __expm1f128 (long double);
for __typeof (__expm1l) and __typeof (__expm1f128) when __expm1 is
defined since __expm1 may be expanded in their declarations which
causes the build failure.
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Multiple versions of expm1.
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Copyright (C) 2023 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 <libm-alias-double.h>
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extern double __redirect_expm1 (double);
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#define SYMBOL_NAME expm1
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#include "ifunc-fma.h"
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libc_ifunc_redirected (__redirect_expm1, __expm1, IFUNC_SELECTOR ());
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libm_alias_double (__expm1, expm1)
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#define __expm1 __expm1_sse2
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/* NB: __expm1 may be expanded to __expm1_sse2 in the following
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prototypes. */
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extern long double __expm1l (long double);
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extern long double __expm1f128 (long double);
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#include <sysdeps/ieee754/dbl-64/s_expm1.c>
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