sysdeps/hppa/fpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   2    Copyright (C) 1997-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by David Huggins-Daines <dhd@debian.org>, 2000
   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.h>
  21 #include <fpu_control.h>
  22
  23 int
  24 fesetexceptflag (const fexcept_t *flagp, int excepts)
  25 {
  26   fpu_control_t fpsr;
  27   fpu_control_t fpsr_new;
  28
  29   /* Get the current status word. */
  30   _FPU_GETCW (fpsr);
  31   excepts &= FE_ALL_EXCEPT;
  32
  33   /* Install new raised flags.  */
  34   fpsr_new = fpsr & ~(excepts << _FPU_HPPA_SHIFT_FLAGS);
  35   fpsr_new |= (*flagp & excepts) << _FPU_HPPA_SHIFT_FLAGS;
  36
  37   /* Store the new status word.  */
  38   if (fpsr != fpsr_new)
  39     _FPU_SETCW (fpsr_new);
  40
  41   /* Success.  */
  42   return 0;
  43 }