about summary refs log tree commit diff
path: root/sysdeps/ia64/fpu/feholdexcpt.c
blob: 129698d35c8887dd716547c42a956d3d9223fff6 (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
37
38
39
40
41
42
43
/* Store current floating-point environment and clear exceptions.
   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Christian Boissat <Christian.Boissat@cern.ch>, 1999

   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
   <https://www.gnu.org/licenses/>.  */

#include <fenv.h>

int
__feholdexcept (fenv_t *envp)
{
  fenv_t fpsr;
  /* Save the current state.  */
  __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
  *envp = fpsr;

  /* Set the trap disable bits.  */
  fpsr |= FE_ALL_EXCEPT;

  /* And clear the exception bits.  */
  fpsr &= ~(fenv_t) (FE_ALL_EXCEPT << 13);

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

  /* Success.  */
  return 0;
}
libm_hidden_def (__feholdexcept)
weak_alias (__feholdexcept, feholdexcept)
libm_hidden_weak (feholdexcept)