about summary refs log tree commit diff
path: root/ports/sysdeps/alpha/fpu/fegetround.c
blob: 869d8306b36bc578714d42f9069ad5b0565cdfd4 (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
/* Return current rounding direction.
   Copyright (C) 1997, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson <rth@tamu.edu>, 1997

   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_libc.h>

int
fegetround (void)
{
  unsigned long fpcr;

  __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr));

  return (fpcr >> FPCR_ROUND_SHIFT) & 3;
}