math/w_fmod_compat.c

   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 #if LIBM_SVID_COMPAT
  24 /* wrapper fmod */
  25 double
  26 __fmod (double x, double y)
  27 {
  28   if (__builtin_expect (isinf (x) || y == 0.0, 0)
  29       && _LIB_VERSION != _IEEE_ && !isnan (y) && !isnan (x))
  30     /* fmod(+-Inf,y) or fmod(x,0) */
  31     return __kernel_standard (x, y, 27);
  32
  33   return __ieee754_fmod (x, y);
  34 }
  35 libm_alias_double (__fmod, fmod)
  36 #endif