sysdeps/s390/fpu/fetestexceptflag.c

   1 /* Test exception in saved exception state.  S/390 version.
   2    Copyright (C) 2016 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <fenv_libc.h>
  21
  22 int
  23 fetestexceptflag (const fexcept_t *flagp, int excepts)
  24 {
  25   /* As *flagp is obtained by an earlier call of fegetexceptflag the
  26      bits 0-5 of dxc-byte are either zero or correspond to the
  27      flag-bits.  Evaluate flags and last dxc-exception-code.  */
  28   return (((*flagp >> FPC_FLAGS_SHIFT) | (*flagp >> FPC_DXC_SHIFT))
  29           & excepts
  30           & FE_ALL_EXCEPT);
  31 }