1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1994-1997, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * __dtoul(x) converts double x to unsigned long. 31 */ 32 unsigned long 33 __dtoul(double x) 34 { 35 union { 36 double d; 37 unsigned long l; 38 } u; 39 40 u.d = x; 41 42 /* handle cases for which double->unsigned long differs from */ 43 /* double->signed long */ 44 if ((u.l >> 52) == 0x43e) { 45 /* 2^63 <= x < 2^64 */ 46 return (0x8000000000000000ul | (u.l << 11)); 47 } 48 49 /* for all other cases, just convert to signed long */ 50 return ((long)x); 51 } 52