libm/nds32/fclrexcpt.c

   1 /*
   2  * Copyright (C) 2016-2017 Andes Technology, Inc.
   3  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   4  */
   5
   6 /* Clear given exceptions in current floating-point environment.
   7    Copyright (C) 1997-2013 Free Software Foundation, Inc.
   8
   9    The GNU C Library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Lesser General Public
  11    License as published by the Free Software Foundation; either
  12    version 2.1 of the License, or (at your option) any later version.
  13
  14    The GNU C Library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Lesser General Public License for more details.
  18
  19    You should have received a copy of the GNU Lesser General Public
  20    License along with the GNU C Library.  If not, see
  21    <http://www.gnu.org/licenses/>.  */
  22
  23 #include <fenv.h>
  24 #include "fenv_libc.h"
  25 #include <fpu_control.h>
  26
  27
  28 int
  29 feclearexcept (int excepts)
  30 {
  31 #ifdef  __NDS32_ABI_2FP_PLUS__
  32       unsigned long int temp;
  33
  34       /* Mask out unsupported bits/exceptions.  */
  35       excepts &= FE_ALL_EXCEPT;
  36
  37       /* Get the current floating point status. */
  38       _FPU_GETCW (temp);
  39
  40       /* Clear the relevant bits.  */
  41       temp &= ~excepts;
  42
  43       /* Put the new data in effect.  */
  44       _FPU_SETCW (temp);
  45
  46       /* Success.  */
  47       return 0;
  48 #else
  49       /* Unsupported, so fail unless nothing needs to be done.  */
  50       return (excepts != 0);
  51 #endif
  52 }