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 * %sccs.include.redist.c% 10 */ 11 12 #ifndef lint 13 static char copyright[] = 14 "@(#) Copyright (c) 1992, 1993\n\ 15 The Regents of the University of California. All rights reserved.\n"; 16 #endif /* not lint */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)mul.c 8.1 (Berkeley) 06/04/93"; 20 #endif /* not lint */ 21 22 #include <stdio.h> 23 24 main() 25 { 26 union { long long q; unsigned long v[2]; } a, b, m; 27 char buf[300]; 28 extern long long __muldi3(long long, long long); 29 30 for (;;) { 31 printf("> "); 32 if (fgets(buf, sizeof buf, stdin) == NULL) 33 break; 34 if (sscanf(buf, "%lu:%lu %lu:%lu", 35 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && 36 sscanf(buf, "0x%lx:%lx 0x%lx:%lx", 37 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { 38 printf("eh?\n"); 39 continue; 40 } 41 m.q = __muldi3(a.q, b.q); 42 printf("%lx:%lx * %lx:%lx => %lx:%lx\n", 43 a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); 44 printf(" = %lX%08lX * %lX%08lX => %lX%08lX\n", 45 a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); 46 } 47 exit(0); 48 } 49