libm/x86_64/fegetexcept.c

   1 /* Get enabled floating-point exceptions.
   2    Copyright (C) 2001-2017 Free Software Foundation, Inc.
   3    Contributed by Andreas Jaeger <aj@suse.de>, 2001.
   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; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20
  21 int
  22 fegetexcept (void)
  23 {
  24   unsigned short int exc;
  25
  26   /* Get the current control word.  */
  27   __asm__ ("fstcw %0" : "=m" (*&exc));
  28
  29   return (~exc) & FE_ALL_EXCEPT;
  30 }