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Makefile
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divrem.c
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mul.c
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Editing: mul.c
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1992, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)mul.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <stdio.h> main() { union { long long q; unsigned long v[2]; } a, b, m; char buf[300]; extern long long __muldi3(long long, long long); for (;;) { printf("> "); if (fgets(buf, sizeof buf, stdin) == NULL) break; if (sscanf(buf, "%lu:%lu %lu:%lu", &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 && sscanf(buf, "0x%lx:%lx 0x%lx:%lx", &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) { printf("eh?\n"); continue; } m.q = __muldi3(a.q, b.q); printf("%lx:%lx * %lx:%lx => %lx:%lx\n", a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); printf(" = %lX%08lX * %lX%08lX => %lX%08lX\n", a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]); } exit(0); }
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