libm/nds32/feholdexcpt.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 /* Store current floating-point environment and clear exceptions.
   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 <fpu_control.h>
  25 #include "fenv_libc.h"
  26
  27 int
  28 feholdexcept (fenv_t *envp)
  29 {
  30 #ifdef __NDS32_ABI_2FP_PLUS__
  31         unsigned long int temp;
  32
  33         /* Store the environment.  */
  34         _FPU_GETCW(temp);
  35         envp->__fpcsr = temp;
  36
  37         /* Now set all exceptions to non-stop.  */
  38         temp &= ~(FE_ALL_EXCEPT << ENABLE_SHIFT);
  39
  40         /* And clear all exception flags.  */
  41         temp &= ~FE_ALL_EXCEPT;
  42
  43         _FPU_SETCW(temp);
  44
  45         return 0;
  46 #else
  47         /* Unsupported, so fail.  */
  48         return 1;
  49 #endif
  50 }
  51