sysdeps/powerpc/fpu/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   2    Copyright (C) 1997,99,2000,01 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    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
  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 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);