sysdeps/sh/sh4/fpu/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2005, 2010
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   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
  23 int
  24 feholdexcept (fenv_t *envp)
  25 {
  26   unsigned long int temp;
  27
  28   /* Store the environment.  */
  29   _FPU_GETCW (temp);
  30   envp->__fpscr = temp;
  31
  32   /* Clear the status flags.  */
  33   temp &= ~FE_ALL_EXCEPT;
  34
  35   /* Now set all exceptions to non-stop.  */
  36   temp &= ~(FE_ALL_EXCEPT << 5);
  37
  38   _FPU_SETCW (temp);
  39
  40   /* Success.  */
  41   return 0;
  42 }
  43 libm_hidden_def (feholdexcept)