shithub: purgatorio

ref: 5611a46d8fb04ec3fd60c05a1486743cea98a311
dir: /libmath/fdlibm/s_finite.c/

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/* derived from /netlib/fdlibm */

/* @(#)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"

	int finite(double x)
{
	int hx; 
	hx = __HI(x);
	return  (unsigned)((hx&0x7fffffff)-0x7ff00000)>>31;
}