sysdeps/csky/fpu/fedisblxcpt.c

   1 /* Disable floating-point exceptions.
   2    Copyright (C) 2018-2024 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 <fenv_libc.h>
  21 #include <fpu_control.h>
  22
  23 int
  24 fedisableexcept (int excepts)
  25 {
  26   unsigned int new_exc, old_exc;
  27
  28   /* Get the current control word.  */
  29   _FPU_GETCW (new_exc);
  30
  31   old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
  32
  33   /* Get the except disable mask.  */
  34   excepts &= FE_ALL_EXCEPT;
  35   new_exc &= ~(excepts << ENABLE_SHIFT);
  36
  37   /* Put the new data in effect.  */
  38   _FPU_SETCW (new_exc);
  39
  40   return old_exc;
  41 }