sysdeps/powerpc/fpu/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   2    Copyright (C) 1997-2014 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    <http://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);