sysdeps/mips/fpu/fedisblxcpt.c

   1 /* Disable floating-point exceptions.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Jaeger <aj@suse.de>, 2000.
   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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <fenv.h>
  22 #include <fenv_libc.h>
  23 #include <fpu_control.h>
  24
  25 int
  26 fedisableexcept (int excepts)
  27 {
  28   unsigned int new_exc, old_exc;
  29
  30   /* Get the current control word.  */
  31   _FPU_GETCW (new_exc);
  32
  33   old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
  34
  35   excepts &= FE_ALL_EXCEPT;
  36
  37   new_exc &= ~(excepts << ENABLE_SHIFT);
  38   new_exc &= ~_FPU_RESERVED;
  39   _FPU_SETCW (new_exc);
  40
  41   return old_exc;
  42 }