1 /* $OpenBSD: moddi3.c,v 1.2 1997/11/07 15:56:45 niklas Exp $ */ 2 /* $NetBSD: moddi3.c,v 1.5 1995/10/07 09:26:31 mycroft Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 #if 0 43 static char sccsid[] = "@(#)moddi3.c 8.1 (Berkeley) 6/4/93"; 44 #else 45 static char rcsid[] = "$OpenBSD: moddi3.c,v 1.2 1997/11/07 15:56:45 niklas Exp $"; 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 #include "quad.h" 50 51 /* 52 * Return remainder after dividing two signed quads. 53 * 54 * XXX 55 * If -1/2 should produce -1 on this machine, this code is wrong. 56 */ 57 quad_t 58 __moddi3(a, b) 59 quad_t a, b; 60 { 61 u_quad_t ua, ub, ur; 62 int neg; 63 64 if (a < 0) 65 ua = -(u_quad_t)a, neg = 1; 66 else 67 ua = a, neg = 0; 68 if (b < 0) 69 ub = -(u_quad_t)b, neg ^= 1; 70 else 71 ub = b; 72 (void)__qdivrem(ua, ub, &ur); 73 return (neg ? -ur : ur); 74 } 75