about summary refs log tree commit diff
path: root/sysdeps/ia64/fpu/fedisblxcpt.c
blob: 9380925a59ccfb70f123945d3e09530a49016179 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/* Disable floating-point exceptions.
   Copyright (C) 2000-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jes Sorensen <Jes.Sorensen@cern.ch>, 2000.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <fenv.h>

int
fedisableexcept (int excepts)
{
  fenv_t old_fpsr;
  fenv_t new_fpsr;

  /* Get the current fpsr.  */
  __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (old_fpsr));

  new_fpsr = old_fpsr | ((fenv_t) excepts & FE_ALL_EXCEPT);

  __asm__ __volatile__ ("mov.m ar.fpsr=%0" :: "r" (new_fpsr) : "memory");

  return (old_fpsr ^ FE_ALL_EXCEPT) & FE_ALL_EXCEPT;
}