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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 #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 
     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