1 /* Copyright (C) 2011-2022 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 */ 26 double __atanh(double x)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 } 38 libm_alias_double (__atanh, atanh) 39 #endif 40