libm/x86_64/fegetmode.c

   1 /* Store current floating-point control modes.  x86_64 version.
   2    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <fenv.h>
  19 #include <fpu_control.h>
  20
  21 int
  22 fegetmode (femode_t *modep)
  23 {
  24   _FPU_GETCW (modep->__control_word);
  25   __asm__ ("stmxcsr %0" : "=m" (modep->__mxcsr));
  26   return 0;
  27 }