libm/nds32/feupdateenv.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 /* Install given floating-point environment and raise exceptions.
   7    Copyright (C) 1997-2013 Free Software Foundation, Inc.
   8    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   9
  10    The GNU C Library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 2.1 of the License, or (at your option) any later version.
  14
  15    The GNU C Library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with the GNU C Library.  If not, see
  22    <http://www.gnu.org/licenses/>.  */
  23
  24 #include <fenv.h>
  25 #include <fpu_control.h>
  26
  27 int
  28 feupdateenv (const fenv_t *envp)
  29 {
  30 #ifdef __NDS32_ABI_2FP_PLUS__
  31         unsigned int temp;
  32
  33         /* Get the current exception state.  */
  34         _FPU_GETCW (temp);
  35
  36         /* Install new environment.  */
  37         fesetenv (envp);
  38
  39         /* Raise the saved exceptions.  */
  40         feraiseexcept (temp & FE_ALL_EXCEPT);
  41
  42         /* Success.  */
  43         return 0;
  44 #else
  45         /* Unsupported, so fail.  */
  46         return 1;
  47 #endif
  48 }