sysdeps/aarch64/fpu/fsetexcptflg.c

   1 /* Copyright (C) 1997-2015 Free Software Foundation, Inc.
   2
   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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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 <fpu_control.h>
  21
  22 int
  23 fesetexceptflag (const fexcept_t *flagp, int excepts)
  24 {
  25   fpu_fpsr_t fpsr;
  26   fpu_fpsr_t fpsr_new;
  27
  28   /* Get the current environment.  */
  29   _FPU_GETFPSR (fpsr);
  30   excepts &= FE_ALL_EXCEPT;
  31
  32   /* Set the desired exception mask.  */
  33   fpsr_new = fpsr & ~excepts;
  34   fpsr_new |= *flagp & excepts;
  35
  36   /* Save state back to the FPU.  */
  37   if (fpsr != fpsr_new)
  38     _FPU_SETFPSR (fpsr_new);
  39
  40   return 0;
  41 }