uclibc-ng/libm/nds32/fclrexcpt.c

/*
 * Copyright (C) 2016-2017 Andes Technology, Inc.
 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 */

/* Clear given exceptions in current floating-point environment.
   Copyright (C) 1997-2013 Free Software Foundation, Inc.

   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>
#include "fenv_libc.h"
#include <fpu_control.h>


int
feclearexcept (int excepts)
{
#ifdef  __NDS32_ABI_2FP_PLUS__
      unsigned long int temp;

      /* Mask out unsupported bits/exceptions.  */
      excepts &= FE_ALL_EXCEPT;

      /* Get the current floating point status. */
      _FPU_GETCW (temp);

      /* Clear the relevant bits.  */
      temp &= ~excepts;

      /* Put the new data in effect.  */
      _FPU_SETCW (temp);

      /* Success.  */
      return 0;
#else
      /* Unsupported, so fail unless nothing needs to be done.  */
      return (excepts != 0);
#endif
}