sysdeps/s390/fpu/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   2    Copyright (C) 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 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 #include <fpu_control.h>
  22
  23 int
  24 feclearexcept (int excepts)
  25 {
  26   fexcept_t temp;
  27
  28   /* Mask out unsupported bits/exceptions.  */
  29   excepts &= FE_ALL_EXCEPT;
  30
  31   _FPU_GETCW (temp);
  32   /* Clear the relevant bits.  */
  33   temp &= ~((excepts << FPC_DXC_SHIFT)|(excepts << FPC_FLAGS_SHIFT));
  34
  35   /* Put the new data in effect.  */
  36   _FPU_SETCW (temp);
  37
  38   /* Success.  */
  39   return 0;
  40 }