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 "%M%" 30 31/ Double long multiply routine. 32 33#include <sys/asm_linkage.h> 34 35 ANSI_PRAGMA_WEAK(lmul,function) 36 37#include "SYS.h" 38 39 .set lop,8 40 .set rop,16 41 .set ans,0 42 43 ENTRY(lmul) 44 popl %eax 45 xchgl %eax,0(%esp) 46 47 pushl %eax 48 49 movl lop+4(%esp),%eax 50 mull rop(%esp) / high(lop) * low(rop) 51 movl %eax,%ecx / partial high(product) 52 53 movl rop+4(%esp),%eax 54 mull lop(%esp) / high(rop) * low(lop) 55 addl %eax,%ecx / partial sum of high(product) 56 57 movl rop(%esp),%eax 58 mull lop(%esp) / low(rop) * low(lop) 59 addl %edx,%ecx / final high(product) 60 61 movl %eax,%edx 62 popl %eax 63 movl %edx,ans(%eax) 64 movl %ecx,ans+4(%eax) 65 66 ret 67 SET_SIZE(lmul) 68