math/fesetround.c

   1 /* Set current rounding direction.
   2    Copyright (C) 1997-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21
  22 int
  23 __fesetround (int round)
  24 {
  25 #ifdef FE_TONEAREST
  26   return (round == FE_TONEAREST) ? 0 : 1;
  27 #else
  28   return 1;     /* Signal we are unable to set the direction.  */
  29 #endif
  30 }
  31 libm_hidden_def (__fesetround)
  32 weak_alias (__fesetround, fesetround)
  33 libm_hidden_weak (fesetround)
  34 stub_warning (fesetround)