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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 | |
cccda09f | 8 | * software is freely granted, provided that this notice |
f7eac6eb RM |
9 | * is preserved. |
10 | * ==================================================== | |
11 | */ | |
12 | ||
13 | #if defined(LIBM_SCCS) && !defined(lint) | |
14 | static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc 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 | ||
7edb55ce | 25 | #undef __finite |
f7eac6eb RM |
26 | #ifdef __STDC__ |
27 | int __finite(double x) | |
28 | #else | |
29 | int __finite(x) | |
30 | double x; | |
31 | #endif | |
32 | { | |
33 | int32_t hx; | |
34 | GET_HIGH_WORD(hx,x); | |
35 | return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); | |
36 | } | |
76f2646f | 37 | hidden_def (__finite) |
f7eac6eb | 38 | weak_alias (__finite, finite) |
cccda09f UD |
39 | #ifdef NO_LONG_DOUBLE |
40 | strong_alias (__finite, __finitel) | |
41 | weak_alias (__finite, finitel) | |
42 | #endif |