math/w_fmod_compat.c

   1 /* Copyright (C) 2011-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
   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 #include <math_private.h>
  21 #include <math-svid-compat.h>
  22 #include <libm-alias-double.h>
  23
  24 #if LIBM_SVID_COMPAT
  25 /* wrapper fmod */
  26 double
  27 __fmod (double x, double y)
  28 {
  29   if (__builtin_expect (isinf (x) || y == 0.0, 0)
  30       && _LIB_VERSION != _IEEE_ && !isnan (y) && !isnan (x))
  31     /* fmod(+-Inf,y) or fmod(x,0) */
  32     return __kernel_standard (x, y, 27);
  33
  34   return __ieee754_fmod (x, y);
  35 }
  36 libm_alias_double (__fmod, fmod)
  37 #endif