/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

        .file   "lshiftl.s"

/ Shift a double long value.

#include "SYS.h"

        .set    arg,8
        .set    cnt,16
        .set    ans,0

        ENTRY(lshiftl)
        popl    %eax
        xchgl   %eax,0(%esp)

        pushl   %eax
        movl    arg(%esp),%eax
        movl    arg+4(%esp),%edx
        movl    cnt(%esp),%ecx
        orl     %ecx,%ecx
        jz      .lshiftld
        jns     .lshiftlp

/ We are doing a negative (right) shift

        negl    %ecx

.lshiftln:
        sarl    $1,%edx
        rcrl    $1,%eax
        loop    .lshiftln
        jmp     .lshiftld

/ We are doing a positive (left) shift

.lshiftlp:
        shll    $1,%eax
        rcll    $1,%edx
        loop    .lshiftlp

/ We are done.

.lshiftld:
        movl    %eax,%ecx
        popl    %eax
        movl    %ecx,ans(%eax)
        movl    %edx,ans+4(%eax)

        ret
        SET_SIZE(lshiftl)