1  /* Test exception in current environment.
       2     Copyright (C) 2001-2023 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  
      21  int
      22  fetestexcept (int excepts)
      23  {
      24    int temp;
      25    unsigned int mxscr;
      26  
      27    /* Get current exceptions.  */
      28    __asm__ ("fnstsw %0\n"
      29  	   "stmxcsr %1" : "=m" (*&temp), "=m" (*&mxscr));
      30  
      31    return (temp | mxscr) & excepts & FE_ALL_EXCEPT;
      32  }
      33  libm_hidden_def (fetestexcept)