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/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
#include <math-svid-compat.h>
#include <libm-alias-double.h>
#if LIBM_SVID_COMPAT
/* wrapper atanh */
double
__atanh (double x)
{
if (__builtin_expect (isgreaterequal (fabs (x), 1.0), 0)
&& _LIB_VERSION != _IEEE_)
return __kernel_standard (x, x,
fabs (x) > 1.0
? 30 /* atanh(|x|>1) */
: 31); /* atanh(|x|==1) */
return __ieee754_atanh (x);
}
libm_alias_double (__atanh, atanh)
#endif
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