1/* Copyright (C) 2011-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <math.h>
19#include <math_private.h>
20#include <math-svid-compat.h>
21#include <libm-alias-double.h>
22
23
24#if LIBM_SVID_COMPAT
25/* wrapper atanh */
26double
27__atanh (double x)
28{
29 if (__builtin_expect (isgreaterequal (fabs (x), 1.0), 0)
30 && _LIB_VERSION != _IEEE_)
31 return __kernel_standard (x, x,
32 fabs (x) > 1.0
33 ? 30 /* atanh(|x|>1) */
34 : 31); /* atanh(|x|==1) */
35
36 return __ieee754_atanh (x);
37}
38libm_alias_double (__atanh, atanh)
39#endif
40