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 __FBSDID("$FreeBSD$"); 15 16 /* 17 * finite(x) returns 1 is x is finite, else 0; 18 * no branching! 19 */ 20 21 #include "math.h" 22 #include "math_private.h" 23 24 int finite(double x) 25 { 26 int32_t hx; 27 GET_HIGH_WORD(hx,x); 28 return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); 29 } 30