1 /* $NetBSD: erand48.c,v 1.4 1998/01/09 03:15:36 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1993 Martin Birgmeier 5 * All rights reserved. 6 * 7 * You may redistribute unmodified or modified versions of this source 8 * code provided that the above copyright notice and this and the 9 * following conditions are retained. 10 * 11 * This software is provided ``as is'', and comes with no warranties 12 * of any kind. I shall in no event be liable for anything that happens 13 * to anyone/anything when using this software. 14 */ 15 16 #include "namespace.h" 17 #include "rand48.h" 18 19 #ifdef __weak_alias 20 __weak_alias(erand48,_erand48); 21 #endif 22 23 double 24 erand48(unsigned short xseed[3]) 25 { 26 __dorand48(xseed); 27 return ldexp((double) xseed[0], -48) + 28 ldexp((double) xseed[1], -32) + 29 ldexp((double) xseed[2], -16); 30 } 31