about summary refs log tree commit diff
path: root/sysdeps/mips/fesetround.c
blob: 6b623d6eab9f7433c342a0d3620748cfe205f4f4 (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
/* Set current rounding direction.
   Copyright (C) 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1998.

   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.h>
#include <fpu_control.h>

int
fesetround (int round)
{
  unsigned short int cw;

  if ((round & ~0x3) != 0)
    /* ROUND is no valid rounding mode.  */
    return 0;

  /* Get current state.  */
  _FPU_GETCW (cw);

  /* Set rounding bits.  */
  cw &= ~0x3;
  cw |= round;
  /* Set new state.  */
  _FPU_SETCW (cw);

  return 1;
}