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 "lshiftl.s" 28 29/ Shift a double long value. 30 31#include "SYS.h" 32 33 .set arg,8 34 .set cnt,16 35 .set ans,0 36 37 ENTRY(lshiftl) 38 popl %eax 39 xchgl %eax,0(%esp) 40 41 pushl %eax 42 movl arg(%esp),%eax 43 movl arg+4(%esp),%edx 44 movl cnt(%esp),%ecx 45 orl %ecx,%ecx 46 jz .lshiftld 47 jns .lshiftlp 48 49/ We are doing a negative (right) shift 50 51 negl %ecx 52 53.lshiftln: 54 sarl $1,%edx 55 rcrl $1,%eax 56 loop .lshiftln 57 jmp .lshiftld 58 59/ We are doing a positive (left) shift 60 61.lshiftlp: 62 shll $1,%eax 63 rcll $1,%edx 64 loop .lshiftlp 65 66/ We are done. 67 68.lshiftld: 69 movl %eax,%ecx 70 popl %eax 71 movl %ecx,ans(%eax) 72 movl %edx,ans+4(%eax) 73 74 ret 75 SET_SIZE(lshiftl) 76