1  /* Copyright (C) 1997-2023 Free Software Foundation, Inc.
       2  
       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 License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     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  
      22  int
      23  fesetexceptflag (const fexcept_t *flagp, int excepts)
      24  {
      25    fpu_fpsr_t fpsr;
      26    fpu_fpsr_t fpsr_new;
      27  
      28    /* Get the current environment.  */
      29    _FPU_GETFPSR (fpsr);
      30    excepts &= FE_ALL_EXCEPT;
      31  
      32    /* Set the desired exception mask.  */
      33    fpsr_new = fpsr & ~excepts;
      34    fpsr_new |= *flagp & excepts;
      35  
      36    /* Save state back to the FPU.  */
      37    if (fpsr != fpsr_new)
      38      _FPU_SETFPSR (fpsr_new);
      39  
      40    return 0;
      41  }