sysdeps/arm/fesetround.c

   1 /* Set current rounding direction.
   2    Copyright (C) 2004-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv_private.h>
  20 #include <arm-features.h>
  21
  22
  23 int
  24 __fesetround (int round)
  25 {
  26   /* FE_TONEAREST is the only supported rounding mode
  27      if a VFP unit isn't present.  */
  28   if (!ARM_HAVE_VFP)
  29     return (round == FE_TONEAREST) ? 0 : 1;
  30
  31   if (round & ~_FPU_MASK_RM)
  32     return 1;
  33
  34   libc_fesetround_vfp (round);
  35   return 0;
  36 }
  37 libm_hidden_def (__fesetround)
  38 weak_alias (__fesetround, fesetround)
  39 libm_hidden_weak (fesetround)