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 #include <sys/cdefs.h>
14 #if defined(LIBM_SCCS) && !defined(lint)
15 __RCSID("$NetBSD: s_finite.c,v 1.13 2024/05/08 01:40:27 riastradh Exp $");
16 #endif
17
18 /*
19 * finite(x) returns 1 if x is finite, else 0;
20 * no branching!
21 */
22
23 #include "namespace.h"
24 #include "math.h"
25 #include "math_private.h"
26
__weak_alias(finite,_finite)27 __weak_alias(finite, _finite)
28
29 int
30 finite(double x)
31 {
32 int32_t hx;
33 GET_HIGH_WORD(hx,x);
34 return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
35 }
36