blob: e35b776a41944812f2e42fff9ef9d516b3f41c45 (
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
|
/* @(#)s_finite.c 1.3 95/01/18 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunSoft, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* finite(x) returns 1 is x is finite, else 0;
* no branching!
*/
#include "fdlibm.h"
#ifdef __STDC__
int finite(double x)
#else
int finite(x)
double x;
#endif
{
uint32_t hx;
GET_HIGH_WORD(hx,x);
return (unsigned)((hx&0x7fffffff)-0x7ff00000)>>31;
}
|