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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1992, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #if defined(LIBC_SCCS) && !defined(lint) 41 static char sccsid[] = "@(#)mul.c 8.1 (Berkeley) 6/4/93"; 42 #endif /* LIBC_SCCS and not lint */ 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #include <stdio.h> 47 48 main() 49 { 50 union { long long q; unsigned long v[2]; } a, b, m; 51 char buf[300]; 52 extern long long __muldi3(long long, long long); 53 54 for (;;) { 55 printf("> "); 56 if (fgets(buf, sizeof buf, stdin) == NULL) 57 break; 58 if (sscanf(buf, "%lu:%lu %lu:%lu", 59 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && 60 sscanf(buf, "0x%lx:%lx 0x%lx:%lx", 61 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { 62 printf("eh?\n"); 63 continue; 64 } 65 m.q = __muldi3(a.q, b.q); 66 printf("%lx:%lx * %lx:%lx => %lx:%lx\n", 67 a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); 68 printf(" = %lX%08lX * %lX%08lX => %lX%08lX\n", 69 a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); 70 } 71 exit(0); 72 } 73