1  /* Set floating-point environment exception handling.
       2     Copyright (C) 1997-2023 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 <math.h>
      21  
      22  int
      23  __fesetexceptflag (const fexcept_t *flagp, int excepts)
      24  {
      25    fexcept_t fpsr;
      26  
      27    /* Get the current status register.  */
      28    __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
      29  
      30    /* Install the new exception bits in the Accrued Exception Byte.  */
      31    fpsr &= ~(excepts & FE_ALL_EXCEPT);
      32    fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
      33  
      34    /* Store the new status register.  */
      35    __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
      36  
      37    /* Success.  */
      38    return 0;
      39  }
      40  
      41  #include <shlib-compat.h>
      42  #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
      43  strong_alias (__fesetexceptflag, __old_fesetexceptflag)
      44  compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
      45  #endif
      46  
      47  versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);