1  /* Install given floating-point environment and raise exceptions.
       2     Copyright (C) 2018-2023 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     <https://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 saved exception.  Incidentally 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)