summary refs log tree commit diff
path: root/sysdeps/s390/fpu/fsetexcptflg.c
blob: fe3a595cac42ca98b95062c06fbc2abae7ab6a1a (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
44
45
46
/* Set floating-point environment exception handling.
   Copyright (C) 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA. */

#include <fenv_libc.h>
#include <math.h>
#include <fpu_control.h>

int
fesetexceptflag (const fexcept_t *flagp, int excepts)
{
  fexcept_t temp,newexcepts;

  /* Get the current environment.  We have to do this since we cannot
     separately set the status word.  */
  _FPU_GETCW (temp);
  /* Install the new exception bits in the Accrued Exception Byte.  */
  excepts = excepts & FE_ALL_EXCEPT;
  newexcepts = (excepts << FPC_DXC_SHIFT) | (excepts << FPC_FLAGS_SHIFT);
  temp &= ~newexcepts;
  temp |= *flagp & newexcepts;

  /* Store the new status word (along with the rest of the environment.
     Possibly new exceptions are set but they won't get executed unless
     the next floating-point instruction.  */
  _FPU_SETCW (temp);

  /* Success.  */
  return 0;
}