math/s_fmaximum_num_template.c

   1 /* Return maximum number of X and Y.
   2    Copyright (C) 1997-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20
  21 FLOAT
  22 M_DECL_FUNC (__fmaximum_num) (FLOAT x, FLOAT y)
  23 {
  24   if (isgreater (x, y))
  25     return x;
  26   else if (isless (x, y))
  27     return y;
  28   else if (x == y)
  29     return (M_COPYSIGN (1, x) >= M_COPYSIGN (1, y) ? x : y);
  30   else
  31     return isnan (y) ? (isnan (x) ? x + y : x) : y;
  32 }
  33 declare_mgen_alias (__fmaximum_num, fmaximum_num);