blob: 98a3cac1966f0d6ef5117dbe54a88ef3dce0924e (
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
|
/* Return classification value corresponding to argument.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
int
__fpclassifyl (long double x)
{
uint32_t ex, hx, lx;
int retval = FP_NORMAL;
GET_LDOUBLE_WORDS (ex, hx, lx, x);
ex &= 0x7fff;
if ((ex | lx | hx) == 0)
retval = FP_ZERO;
else if (ex == 0 && (hx & 0x80000000) == 0)
retval = FP_SUBNORMAL;
/* Pseudo-normals, i.e. pseudo-zero, pseudo-infinity and un-normals. They
behave like NaNs, so categorize them as such. */
else if ((hx & 0x80000000) == 0)
retval = FP_NAN;
else if (ex == 0x7fff)
retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE;
return retval;
}
libm_hidden_def (__fpclassifyl)
|
