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 #if defined(LIBM_SCCS) && !defined(lint) 14 static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc 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 #ifdef __STDC__ __finite(double x)26 int __finite(double x) 27 #else 28 int __finite(x) 29 double x; 30 #endif 31 { 32 int32_t hx; 33 GET_HIGH_WORD(hx,x); 34 return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); 35 } 36 hidden_def (__finite) 37 weak_alias (__finite, finite) 38 #ifdef NO_LONG_DOUBLE 39 strong_alias (__finite, __finitel) 40 weak_alias (__finite, finitel) 41 #endif 42