sysdeps/s390/fpu/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions.
   2    Copyright (C) 2000, 2005, 2007 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
   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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <fenv_libc.h>
  22 #include <fpu_control.h>
  23
  24 int feholdexcept (fenv_t *envp)
  25 {
  26   fexcept_t fpc;
  27   /* Store the environment.  */
  28   fegetenv (envp);
  29   /* Clear the current sticky bits as more than one exception
  30      may be generated.  */
  31   fpc = envp->fpc & ~(FPC_FLAGS_MASK | FPC_DXC_MASK);
  32   /* Hold from generating fpu exceptions temporarily.  */
  33   _FPU_SETCW ((fpc & ~(FE_ALL_EXCEPT << FPC_EXCEPTION_MASK_SHIFT)));
  34   return 0;
  35 }
  36 libm_hidden_def (feholdexcept)