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 .file "lmul.s" 28 29/ Double long multiply routine. 30 31#include "SYS.h" 32 33 .set lop,8 34 .set rop,16 35 .set ans,0 36 37 ENTRY(lmul) 38 popl %eax 39 xchgl %eax,0(%esp) 40 41 pushl %eax 42 43 movl lop+4(%esp),%eax 44 mull rop(%esp) / high(lop) * low(rop) 45 movl %eax,%ecx / partial high(product) 46 47 movl rop+4(%esp),%eax 48 mull lop(%esp) / high(rop) * low(lop) 49 addl %eax,%ecx / partial sum of high(product) 50 51 movl rop(%esp),%eax 52 mull lop(%esp) / low(rop) * low(lop) 53 addl %edx,%ecx / final high(product) 54 55 movl %eax,%edx 56 popl %eax 57 movl %edx,ans(%eax) 58 movl %ecx,ans+4(%eax) 59 60 ret 61 SET_SIZE(lmul) 62