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 1.11 2002/05/26 22:01:55 wiz Exp $"); 16 #endif 17 18 /* 19 * finite(x) returns 1 is x is finite, else 0; 20 * no branching! 21 */ 22 23 #include "math.h" 24 #include "math_private.h" 25 26 int 27 finite(double x) 28 { 29 int32_t hx; 30 GET_HIGH_WORD(hx,x); 31 return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); 32 } 33