blob: 49986bbde9bebc073869c5d0bc34e55a99640e21 (
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
|
/* @(#)s_finite.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
#endif
/*
* finite(x) returns 1 is x is finite, else 0;
* no branching!
*/
#include <math.h>
#include <math_private.h>
#undef __finite
#ifndef FINITE
# define FINITE __finite
#endif
int FINITE(double x)
{
int32_t hx;
GET_HIGH_WORD (hx, x);
return (int) ((u_int32_t) ((hx & 0x7fffffff) - 0x7ff00000) >> 31);
}
hidden_def (__finite)
weak_alias (__finite, finite)
#ifdef NO_LONG_DOUBLE
strong_alias (__finite, __finitel)
weak_alias (__finite, finitel)
#endif
|
