/* Clear given exceptions in current floating-point environment.

   Copyright (C) 2001-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <fenv.h>

int

feclearexcept (int excepts)

{

  fenv_t temp;

  unsigned int mxcsr;

  /* Mask out unsupported bits/exceptions.  */

  excepts &= FE_ALL_EXCEPT;

  /* Bah, we have to clear selected exceptions.  Since there is no

     `fldsw' instruction we have to do it the hard way.  */

  __asm__ ("fnstenv %0" : "=m" (*&temp));

  /* Clear the relevant bits.  */

  temp.__status_word &= excepts ^ FE_ALL_EXCEPT;

  /* Put the new data in effect.  */

  __asm__ ("fldenv %0" : : "m" (*&temp));

  /* And the same procedure for SSE.  */

  __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));

  /* Clear the relevant bits.  */

  mxcsr &= ~excepts;

  /* And put them into effect.  */

  __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));

  /* Success.  */

  return 0;

}

libm_hidden_def (feclearexcept)