1/* Return classification value corresponding to argument.
2 Copyright (C) 1997-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
5 Jakub Jelinek <jj@ultra.linux.cz>, 1999.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21#include <math.h>
22
23#include <math_private.h>
24
25
26int
27__fpclassifyl (_Float128 x)
28{
29 u_int64_t hx, lx;
30 int retval = FP_NORMAL;
31
32 GET_LDOUBLE_WORDS64 (hx, lx, x);
33 lx |= (hx & 0x0000ffffffffffffLL);
34 hx &= 0x7fff000000000000LL;
35 if ((hx | lx) == 0)
36 retval = FP_ZERO;
37 else if (hx == 0)
38 retval = FP_SUBNORMAL;
39 else if (hx == 0x7fff000000000000LL)
40 retval = lx != 0 ? FP_NAN : FP_INFINITE;
41
42 return retval;
43}
44libm_hidden_def (__fpclassifyl)
45