sysdeps/s390/fpu/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions.
   2    Copyright (C) 2000-2019 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv_libc.h>
  21 #include <fpu_control.h>
  22
  23 int __feholdexcept (fenv_t *envp)
  24 {
  25   fexcept_t fpc;
  26   /* Store the environment.  */
  27   __fegetenv (envp);
  28   /* Clear the current sticky bits as more than one exception
  29      may be generated.  */
  30   fpc = envp->__fpc & ~(FPC_FLAGS_MASK | FPC_DXC_MASK);
  31   /* Hold from generating fpu exceptions temporarily.  */
  32   _FPU_SETCW ((fpc & ~(FE_ALL_EXCEPT << FPC_EXCEPTION_MASK_SHIFT)));
  33   return 0;
  34 }
  35 libm_hidden_def (__feholdexcept)
  36 weak_alias (__feholdexcept, feholdexcept)
  37 libm_hidden_weak (feholdexcept)