divrem.c revision 1573
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1992, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This software was developed by the Computer Systems Engineering group 61573Srgrimes * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 71573Srgrimes * contributed to Berkeley. 81573Srgrimes * 91573Srgrimes * Redistribution and use in source and binary forms, with or without 101573Srgrimes * modification, are permitted provided that the following conditions 111573Srgrimes * are met: 121573Srgrimes * 1. Redistributions of source code must retain the above copyright 131573Srgrimes * notice, this list of conditions and the following disclaimer. 141573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 151573Srgrimes * notice, this list of conditions and the following disclaimer in the 161573Srgrimes * documentation and/or other materials provided with the distribution. 171573Srgrimes * 3. All advertising materials mentioning features or use of this software 181573Srgrimes * must display the following acknowledgement: 191573Srgrimes * This product includes software developed by the University of 201573Srgrimes * California, Berkeley and its contributors. 211573Srgrimes * 4. Neither the name of the University nor the names of its contributors 221573Srgrimes * may be used to endorse or promote products derived from this software 231573Srgrimes * without specific prior written permission. 241573Srgrimes * 251573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 261573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 271573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 281573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 301573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 311573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 321573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 331573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 341573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 351573Srgrimes * SUCH DAMAGE. 361573Srgrimes */ 371573Srgrimes 381573Srgrimes#ifndef lint 391573Srgrimesstatic char copyright[] = 401573Srgrimes"@(#) Copyright (c) 1992, 1993\n\ 411573Srgrimes The Regents of the University of California. All rights reserved.\n"; 421573Srgrimes#endif /* not lint */ 431573Srgrimes 441573Srgrimes#ifndef lint 451573Srgrimesstatic char sccsid[] = "@(#)divrem.c 8.1 (Berkeley) 6/4/93"; 461573Srgrimes#endif /* not lint */ 471573Srgrimes 481573Srgrimes#include <stdio.h> 491573Srgrimes 501573Srgrimesmain() 511573Srgrimes{ 521573Srgrimes union { long long q; unsigned long v[2]; } a, b, q, r; 531573Srgrimes char buf[300]; 541573Srgrimes extern long long __qdivrem(unsigned long long, unsigned long long, 551573Srgrimes unsigned long long *); 561573Srgrimes 571573Srgrimes for (;;) { 581573Srgrimes printf("> "); 591573Srgrimes if (fgets(buf, sizeof buf, stdin) == NULL) 601573Srgrimes break; 611573Srgrimes if (sscanf(buf, "%lu:%lu %lu:%lu", 621573Srgrimes &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && 631573Srgrimes sscanf(buf, "0x%lx:%lx 0x%lx:%lx", 641573Srgrimes &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { 651573Srgrimes printf("eh?\n"); 661573Srgrimes continue; 671573Srgrimes } 681573Srgrimes q.q = __qdivrem(a.q, b.q, &r.q); 691573Srgrimes printf("%lx:%lx /%% %lx:%lx => q=%lx:%lx r=%lx:%lx\n", 701573Srgrimes a.v[0], a.v[1], b.v[0], b.v[1], 711573Srgrimes q.v[0], q.v[1], r.v[0], r.v[1]); 721573Srgrimes printf(" = %lX%08lX / %lX%08lX => %lX%08lX\n\ 731573Srgrimes = %lX%08lX %% %lX%08lX => %lX%08lX\n", 741573Srgrimes a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1], 751573Srgrimes a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]); 761573Srgrimes } 771573Srgrimes exit(0); 781573Srgrimes} 79