divrem.c revision 1574
1/*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#ifndef lint 39static char copyright[] = 40"@(#) Copyright (c) 1992, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42#endif /* not lint */ 43 44#ifndef lint 45static char sccsid[] = "@(#)divrem.c 8.1 (Berkeley) 6/4/93"; 46#endif /* not lint */ 47 48#include <stdio.h> 49 50main() 51{ 52 union { long long q; unsigned long v[2]; } a, b, q, r; 53 char buf[300]; 54 extern long long __qdivrem(unsigned long long, unsigned long long, 55 unsigned long long *); 56 57 for (;;) { 58 printf("> "); 59 if (fgets(buf, sizeof buf, stdin) == NULL) 60 break; 61 if (sscanf(buf, "%lu:%lu %lu:%lu", 62 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && 63 sscanf(buf, "0x%lx:%lx 0x%lx:%lx", 64 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { 65 printf("eh?\n"); 66 continue; 67 } 68 q.q = __qdivrem(a.q, b.q, &r.q); 69 printf("%lx:%lx /%% %lx:%lx => q=%lx:%lx r=%lx:%lx\n", 70 a.v[0], a.v[1], b.v[0], b.v[1], 71 q.v[0], q.v[1], r.v[0], r.v[1]); 72 printf(" = %lX%08lX / %lX%08lX => %lX%08lX\n\ 73 = %lX%08lX %% %lX%08lX => %lX%08lX\n", 74 a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1], 75 a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]); 76 } 77 exit(0); 78} 79