1  /* Clear given exceptions in current floating-point environment.
       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_libc.h>
      20  
      21  #undef feclearexcept
      22  int
      23  __feclearexcept (int excepts)
      24  {
      25    fenv_union_t u, n;
      26  
      27    /* Get the current state.  */
      28    u.fenv = fegetenv_register ();
      29  
      30    /* Clear the relevant bits.  */
      31    n.l = u.l & ~((-(excepts >> (31 - FPSCR_VX) & 1) & FE_ALL_INVALID)
      32  		| (excepts & FPSCR_STICKY_BITS));
      33  
      34    /* Put the new state in effect.  */
      35    if (u.l != n.l)
      36      fesetenv_register (n.fenv);
      37  
      38    /* Success.  */
      39    return 0;
      40  }
      41  
      42  #include <shlib-compat.h>
      43  #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
      44  strong_alias (__feclearexcept, __old_feclearexcept)
      45  compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
      46  #endif
      47  
      48  libm_hidden_ver (__feclearexcept, feclearexcept)
      49  versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);