1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .ident "%Z%%M% %I% %E% SMI" 28 29 .file "muldiv.s" 30 31#include <SYS.h> 32 33 ENTRY(.udiv) 34 wr %g0, %g0, %y 35 nop 36 nop 37 mov %o0, %o3 ! o3 gets remainder 38 udiv %o0, %o1, %o0 ! o0 contains quotient a/b 39 umul %o0, %o1, %o4 ! o4 contains q*b 40 retl 41 sub %o3, %o4, %o3 ! o3 gets a-q*b 42 SET_SIZE(.udiv) 43 44 ENTRY(.div) 45 sra %o0,31,%o4 ! extend sign 46 wr %o4,%g0,%y 47 cmp %o1,0xffffffff ! is divisor -1? 48 be,a 1f ! if yes 49 subcc %g0,%o0,%o0 ! simply negate dividend 50 mov %o0,%o3 ! o3 gets remainder 51 sdiv %o0,%o1,%o0 ! o0 contains quotient a/b 52 smul %o0,%o1,%o4 ! o4 contains q*b 53 retl 54 sub %o3,%o4,%o3 ! o3 gets a-q*b 551: 56 retl 57 mov %g0,%o3 ! remainder is 0 58 SET_SIZE(.div) 59