sysdeps/powerpc/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   2    Copyright (C) 1997, 1999, 2000 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <fenv_libc.h>
  21
  22 #undef feclearexcept
  23 int
  24 __feclearexcept (int excepts)
  25 {
  26   fenv_union_t u;
  27
  28   /* Get the current state.  */
  29   u.fenv = fegetenv_register ();
  30
  31   /* Clear the relevant bits.  */
  32   u.l[1] = u.l[1] & ~((-(excepts >> (31 - FPSCR_VX) & 1) & FE_ALL_INVALID)
  33                       | (excepts & FPSCR_STICKY_BITS));
  34
  35   /* Put the new state in effect.  */
  36   fesetenv_register (u.fenv);
  37
  38   /* Success.  */
  39   return 0;
  40 }
  41 strong_alias (__feclearexcept, __old_feclearexcept)
  42 symbol_version (__old_feclearexcept, feclearexcept, GLIBC_2.1);
  43 default_symbol_version (__feclearexcept, feclearexcept, GLIBC_2.2);