sysdeps/ia64/fpu/feupdateenv.c

   1 /* Install given floating-point environment and raise exceptions.
   2    Copyright (C) 1997-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Christian Boissat <Christian.Boissat@cern.ch>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21
  22 int
  23 __feupdateenv (const fenv_t *envp)
  24 {
  25   fenv_t fpsr;
  26
  27
  28   /* Get the current exception state.  */
  29   __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
  30
  31   /* Install new environment.  */
  32   __fesetenv (envp);
  33
  34   /* Raise the saved exceptions.  */
  35   __feraiseexcept ((int) (fpsr >> 13) & FE_ALL_EXCEPT);
  36
  37   /* Success.  */
  38   return 0;
  39 }
  40 libm_hidden_def (__feupdateenv)
  41 weak_alias (__feupdateenv, feupdateenv)
  42 libm_hidden_weak (feupdateenv)