blob: 8ca65aa7091bca73b623b741c33a74811ea12b00 (
plain)
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
|
/* $OpenBSD: isnormal.c,v 1.4 2008/12/10 01:15:02 martynas Exp $ */
/*
* Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <machine/ieee.h>
#include <float.h>
#include <math.h>
int
__isnormal(double d)
{
struct ieee_double *p = (struct ieee_double *)&d;
return (p->dbl_exp != 0 && p->dbl_exp != DBL_EXP_INFNAN);
}
int
__isnormalf(float f)
{
struct ieee_single *p = (struct ieee_single *)&f;
return (p->sng_exp != 0 && p->sng_exp != SNG_EXP_INFNAN);
}
#if LDBL_MANT_DIG == 53
#ifdef __weak_alias
__weak_alias(__isnormall, __isnormal);
#endif /* __weak_alias */
#endif /* LDBL_MANT_DIG == 53 */
|
