sysdeps/arm/fesetexcept.c

   1 /* Set given exception flags.  ARM version.
   2    Copyright (C) 2016-2017 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.h>
  20 #include <fpu_control.h>
  21 #include <arm-features.h>
  22
  23 int
  24 fesetexcept (int excepts)
  25 {
  26   fpu_control_t fpscr, new_fpscr;
  27
  28   /* Fail if a VFP unit isn't present unless nothing needs to be done.  */
  29   if (!ARM_HAVE_VFP)
  30     return (excepts != 0);
  31
  32   _FPU_GETCW (fpscr);
  33   new_fpscr = fpscr | (excepts & FE_ALL_EXCEPT);
  34   if (new_fpscr != fpscr)
  35     _FPU_SETCW (new_fpscr);
  36
  37   return 0;
  38 }