sysdeps/i386/fpu/fegetmode.c

   1 /* Store current floating-point control modes.  i386 version.
   2    Copyright (C) 2016-2018 Free Software Foundation, Inc.
   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; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <fpu_control.h>
  21 #include <unistd.h>
  22 #include <ldsodefs.h>
  23 #include <dl-procinfo.h>
  24
  25 int
  26 fegetmode (femode_t *modep)
  27 {
  28   _FPU_GETCW (modep->__control_word);
  29   if (HAS_CPU_FEATURE (SSE))
  30     __asm__ ("stmxcsr %0" : "=m" (modep->__mxcsr));
  31   return 0;
  32 }