1 /* $NetBSD: divrem.c,v 1.4 2003/08/07 16:43:18 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)divrem.c 8.1 (Berkeley) 6/4/93"; 45 #else 46 static char rcsid[] = "$NetBSD: divrem.c,v 1.4 2003/08/07 16:43:18 agc Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 #include <stdio.h> 51 52 main() 53 { 54 union { long long q; unsigned int v[2]; } a, b, q, r; 55 char buf[300]; 56 extern long long __qdivrem(unsigned long long, unsigned long long, 57 unsigned long long *); 58 59 for (;;) { 60 printf("> "); 61 if (fgets(buf, sizeof buf, stdin) == NULL) 62 break; 63 if (sscanf(buf, "%u:%u %u:%u", 64 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && 65 sscanf(buf, "0x%x:%x 0x%x:%x", 66 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { 67 printf("eh?\n"); 68 continue; 69 } 70 q.q = __qdivrem(a.q, b.q, &r.q); 71 printf("%x:%x /%% %x:%x => q=%x:%x r=%x:%x\n", 72 a.v[0], a.v[1], b.v[0], b.v[1], 73 q.v[0], q.v[1], r.v[0], r.v[1]); 74 printf(" = %X%08X / %X%08X => %X%08X\n\ 75 = %X%08X %% %X%08X => %X%08X\n", 76 a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1], 77 a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]); 78 } 79 exit(0); 80 } 81