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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31/ Double long multiply routine. 32 33#include "SYS.h" 34 35 .set lop,8 36 .set rop,16 37 .set ans,0 38 39 ENTRY(lmul) 40 popl %eax 41 xchgl %eax,0(%esp) 42 43 pushl %eax 44 45 movl lop+4(%esp),%eax 46 mull rop(%esp) / high(lop) * low(rop) 47 movl %eax,%ecx / partial high(product) 48 49 movl rop+4(%esp),%eax 50 mull lop(%esp) / high(rop) * low(lop) 51 addl %eax,%ecx / partial sum of high(product) 52 53 movl rop(%esp),%eax 54 mull lop(%esp) / low(rop) * low(lop) 55 addl %edx,%ecx / final high(product) 56 57 movl %eax,%edx 58 popl %eax 59 movl %edx,ans(%eax) 60 movl %ecx,ans+4(%eax) 61 62 ret 63 SET_SIZE(lmul) 64