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 acosh */
26double
27__acosh (double x)
28{
29 if (__builtin_expect (isless (x, 1.0), 0) && _LIB_VERSION != _IEEE_)
30 /* acosh(x<1) */
31 return __kernel_standard (x, x, 29);
32
33 return __ieee754_acosh (x);
34}
35libm_alias_double (__acosh, acosh)
36#endif
37