1  /* Raise given exceptions.
       2     Copyright (C) 2000-2023 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 <fenv_libc.h>
      21  #include <fpu_control.h>
      22  
      23  int
      24  __feraiseexcept (int excepts)
      25  {
      26    fpu_control_t cw;
      27  
      28    /* Get current state.  */
      29    _FPU_GETCW (cw);
      30  
      31    /* Set flag bits (which are accumulative), and *also* set the
      32       cause bits. The setting of the cause bits is what actually causes
      33       the hardware to generate the exception, if the corresponding enable
      34       bit is set as well.  */
      35  
      36    excepts &= FE_ALL_EXCEPT;
      37    cw |= excepts | (excepts << CAUSE_SHIFT);
      38  
      39    /* Set new state.  */
      40    _FPU_SETCW (cw);
      41  
      42    return 0;
      43  }
      44  
      45  libm_hidden_def (__feraiseexcept)
      46  weak_alias (__feraiseexcept, feraiseexcept)
      47  libm_hidden_weak (feraiseexcept)