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/ Shift a double long value. 32 33#include <sys/asm_linkage.h> 34 35 ANSI_PRAGMA_WEAK(lshiftl,function) 36 37#include "SYS.h" 38 39 .set arg,8 40 .set cnt,16 41 .set ans,0 42 43 ENTRY(lshiftl) 44 popl %eax 45 xchgl %eax,0(%esp) 46 47 pushl %eax 48 movl arg(%esp),%eax 49 movl arg+4(%esp),%edx 50 movl cnt(%esp),%ecx 51 orl %ecx,%ecx 52 jz .lshiftld 53 jns .lshiftlp 54 55/ We are doing a negative (right) shift 56 57 negl %ecx 58 59.lshiftln: 60 sarl $1,%edx 61 rcrl $1,%eax 62 loop .lshiftln 63 jmp .lshiftld 64 65/ We are doing a positive (left) shift 66 67.lshiftlp: 68 shll $1,%eax 69 rcll $1,%edx 70 loop .lshiftlp 71 72/ We are done. 73 74.lshiftld: 75 movl %eax,%ecx 76 popl %eax 77 movl %ecx,ans(%eax) 78 movl %edx,ans+4(%eax) 79 80 ret 81 SET_SIZE(lshiftl) 82