math/fesetround.c

   1 /* Set current rounding direction.
   2    Copyright (C) 1997-2024 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 <fenv.h>
  20
  21 int
  22 __fesetround (int round)
  23 {
  24 #ifdef FE_TONEAREST
  25   return (round == FE_TONEAREST) ? 0 : 1;
  26 #else
  27   return 1;     /* Signal we are unable to set the direction.  */
  28 #endif
  29 }
  30 libm_hidden_def (__fesetround)
  31 weak_alias (__fesetround, fesetround)
  32 libm_hidden_weak (fesetround)
  33 stub_warning (fesetround)