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41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* Copyright (C) 2011-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
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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 <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-double.h>
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#if LIBM_SVID_COMPAT
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/* wrapper atanh */
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double
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__atanh (double x)
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{
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if (__builtin_expect (isgreaterequal (fabs (x), 1.0), 0)
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&& _LIB_VERSION != _IEEE_)
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return __kernel_standard (x, x,
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fabs (x) > 1.0
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? 30 /* atanh(|x|>1) */
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: 31); /* atanh(|x|==1) */
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return __ieee754_atanh (x);
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}
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libm_alias_double (__atanh, atanh)
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#endif
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