sysdeps/arm/feupdateenv.c

   1 /* Install given floating-point environment and raise exceptions.
   2    Copyright (C) 1997-2014 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 #include <fpu_control.h>
  22 #include <arm-features.h>
  23
  24
  25 int
  26 feupdateenv (const fenv_t *envp)
  27 {
  28   if (ARM_HAVE_VFP)
  29     {
  30       unsigned int temp;
  31
  32       /* Get the current exception state.  */
  33       _FPU_GETCW (temp);
  34
  35       /* Install new environment.  */
  36       fesetenv (envp);
  37
  38       /* Raise the saved exceptions.  */
  39       feraiseexcept (temp & FE_ALL_EXCEPT);
  40
  41       /* Success.  */
  42       return 0;
  43     }
  44
  45   /* Unsupported, so fail.  */
  46   return 1;
  47 }
  48 libm_hidden_def (feupdateenv)