1  /* Install given floating-point environment and raise exceptions for
       2     atomic compound assignment.
       3     Copyright (C) 2013-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       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     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include "soft-fp.h"
      21  #include "soft-supp.h"
      22  #include <signal.h>
      23  
      24  void
      25  __atomic_feupdateenv (const fenv_t *envp)
      26  {
      27    fenv_union_t u;
      28    int saved_exceptions = __sim_exceptions_thread;
      29  
      30    /* This function postdates the global variables being turned into
      31       compat symbols, so no need to set them.  */
      32    u.fenv = *envp;
      33    __sim_exceptions_thread |= u.l[0];
      34    __sim_disabled_exceptions_thread = u.l[1];
      35    if (saved_exceptions & ~__sim_disabled_exceptions_thread)
      36      raise (SIGFPE);
      37  }