ports/sysdeps/am33/fpu/fedisblxcpt.c

   1 /* Disable floating-point exceptions.
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Alexandre Oliva <aoliva@redhat.com>
   5    based on corresponding file in the MIPS port.
   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, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include <fenv.h>
  22 #include <fenv_libc.h>
  23 #include <fpu_control.h>
  24
  25 int
  26 fedisableexcept (int excepts)
  27 {
  28   fpu_control_t 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   _FPU_SETCW (new_exc);
  39
  40   return old_exc;
  41 }