sysdeps/powerpc/nofpu/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions
   2    (soft-float edition).
   3    Copyright (C) 2002 Free Software Foundation, Inc.
   4    Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include "soft-fp.h"
  23 #include "soft-supp.h"
  24
  25 int
  26 feholdexcept (fenv_t *envp)
  27 {
  28   fenv_union_t u;
  29
  30   /* Get the current state.  */
  31   fegetenv (envp);
  32
  33   u.fenv = *envp;
  34   /* Clear everything except the rounding mode.  */
  35   u.l[0] &= 0x3;
  36
  37   /* ?? Should we clear the disabled exceptions as well ?? */
  38
  39   /* Put the new state in effect.  */
  40   fesetenv (envp);
  41
  42   return 0;
  43 }