ports/sysdeps/alpha/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    Contributed by Richard Henderson <rth@tamu.edu>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv_libc.h>
  21
  22 int
  23 __feclearexcept (int excepts)
  24 {
  25   unsigned long int swcr;
  26
  27   /* Get the current state.  */
  28   swcr = __ieee_get_fp_control ();
  29
  30   /* Clear the relevant bits.  */
  31   swcr &= ~((unsigned long int) excepts & SWCR_STATUS_MASK);
  32
  33   /* Put the new state in effect.  */
  34   __ieee_set_fp_control (swcr);
  35
  36   /* Success.  */
  37   return 0;
  38 }
  39
  40 #include <shlib-compat.h>
  41 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  42 strong_alias (__feclearexcept, __old_feclearexcept)
  43 compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
  44 #endif
  45
  46 libm_hidden_ver (__feclearexcept, feclearexcept)
  47 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);