sysdeps/powerpc/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions.
   2    Copyright (C) 1997 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <fenv_libc.h>
  21
  22 int
  23 feholdexcept (fenv_t *envp)
  24 {
  25   fenv_union_t u;
  26
  27   /* Get the current state.  */
  28   u.fenv = *envp = fegetenv_register ();
  29
  30   /* Clear everything except for the rounding mode and non-IEEE arithmetic
  31      flag.  */
  32   u.l[1] = u.l[1] & 7;
  33
  34   /* Put the new state in effect.  */
  35   fesetenv_register (u.fenv);
  36
  37   return 1;
  38 }