1/* Return classification value corresponding to argument.
2   Copyright (C) 1997, 2000, 2002 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6   The GNU C Library is free software; you can redistribute it and/or
7   modify it under the terms of the GNU Lesser General Public
8   License as published by the Free Software Foundation; either
9   version 2.1 of the License, or (at your option) any later version.
10
11   The GNU C Library is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   Lesser General Public License for more details.
15
16   You should have received a copy of the GNU Lesser General Public
17   License along with the GNU C Library; if not, write to the Free
18   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19   02111-1307 USA.  */
20
21#include <math.h>
22
23#include "math_private.h"
24
25
26int
27__fpclassifyl (long double x)
28{
29  u_int32_t ex, hx, lx;
30  int retval = FP_NORMAL;
31
32  GET_LDOUBLE_WORDS (ex, hx, lx, x);
33  ex &= 0x7fff;
34  if ((ex | lx | hx) == 0)
35    retval = FP_ZERO;
36  else if (ex == 0 && (hx & 0x80000000) == 0)
37    retval = FP_SUBNORMAL;
38  else if (ex == 0x7fff)
39    retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE;
40
41  return retval;
42}
43libm_hidden_def (__fpclassifyl)
44