libm/metag/fedisblxcpt.c

   1 /* Disable floating-point exceptions.
   2    Copyright (C) 2013 Imagination Technologies Ltd.
   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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <unistd.h>
  21
  22 #include "internal.h"
  23
  24 int
  25 fedisableexcept (int excepts)
  26 {
  27   unsigned int old_exc;
  28
  29   /* Get the current control word.  */
  30   __asm__ ("MOV %0,TXDEFR" : "=r" (old_exc));
  31
  32   old_exc &= FE_ALL_EXCEPT;
  33
  34   excepts = old_exc & ~excepts;
  35
  36   metag_set_fpu_flags(excepts);
  37
  38   return old_exc;
  39 }