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       ---
       s_finite.c (775B)
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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
            8  * software is freely granted, provided that this notice
            9  * is preserved.
           10  * ====================================================
           11  */
           12 
           13 #ifndef lint
           14 static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_finite.c,v 1.8 2003/07/23 04:53:46 peter 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         int finite(double x)
           26 {
           27         int32_t hx;
           28         GET_HIGH_WORD(hx,x);
           29         return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
           30 }