sysdeps/csky/fpu/feupdateenv.c

   1 /* Install given floating-point environment and raise exceptions.
   2    Copyright (C) 2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <fpu_control.h>
  21 #include <fenv_libc.h>
  22 #include <fenv_private.h>
  23 #include <stdio.h>
  24
  25 int
  26 __feupdateenv (const fenv_t *envp)
  27 {
  28   int temp;
  29
  30   /* Save current exceptions.  */
  31   _FPU_GETFPSR (temp);
  32   temp = (temp >> CAUSE_SHIFT) & FE_ALL_EXCEPT;
  33   /* Install new environment.  */
  34   __fesetenv (envp);
  35
  36   /* Raise the safed exception.  Incidently for us the implementation
  37      defined format of the values in objects of type fexcept_t is the
  38      same as the ones specified using the FE_* constants.  */
  39   feraiseexcept (temp);
  40
  41   /* Success.  */
  42   return 0;
  43 }
  44 libm_hidden_def (__feupdateenv)
  45 weak_alias (__feupdateenv, feupdateenv)
  46 libm_hidden_weak (feupdateenv)