s_finite.c revision 8870 
1/* @(#)s_finite.c 5.1 93/09/24 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#ifndef lint
14static char rcsid[] = "$Id: s_finite.c,v 1.1.1.1 1994/08/19 09:39:51 jkh Exp $";
15#endif
16
17/*
18 * finite(x) returns 1 is x is finite, else 0;
19 * no branching!
20 */
21
22#include "math.h"
23#include "math_private.h"
24
25#ifdef __STDC__
26	int finite(double x)
27#else
28	int finite(x)
29	double x;
30#endif
31{
32	int32_t hx;
33	GET_HIGH_WORD(hx,x);
34	return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
35}
36