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 */
      26  double
      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