sysdeps/hppa/fpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   2    Copyright (C) 1997-2024 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <fpu_control.h>
  21
  22 int
  23 fesetexceptflag (const fexcept_t *flagp, int excepts)
  24 {
  25   fpu_control_t fpsr;
  26   fpu_control_t fpsr_new;
  27
  28   /* Get the current status word. */
  29   _FPU_GETCW (fpsr);
  30   excepts &= FE_ALL_EXCEPT;
  31
  32   /* Install new raised flags.  */
  33   fpsr_new = fpsr & ~(excepts << _FPU_HPPA_SHIFT_FLAGS);
  34   fpsr_new |= (*flagp & excepts) << _FPU_HPPA_SHIFT_FLAGS;
  35
  36   /* Store the new status word.  */
  37   if (fpsr != fpsr_new)
  38     _FPU_SETCW (fpsr_new);
  39
  40   /* Success.  */
  41   return 0;
  42 }