/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

* 

* Description:

*

*/

using System;

using System.Collections.Generic;

using System.Text;

using System.ComponentModel;

using SymbianUtils.BasicTypes;

using SymbianStructuresLib.Arm.Registers;

using SymbianInstructionLib.Arm.Instructions.Common;

namespace SymbianInstructionLib.Arm.Instructions.Arm.DataProcessing

{

    public abstract class Arm_DataProcessing_Shift : Arm_DataProcessing

    {

        #region Enumerations

        public enum TShiftType

        {

            EShiftNone = -1,

            EShiftLogicalLeft = 0,

            EShiftLogicalRight,

            EShiftArithmeticRight,

            EShiftRotateRight,

            EShiftRotateRightWithExtend

        }

        #endregion

        #region Constructors

        protected Arm_DataProcessing_Shift( TEncoding aEncoding )

            : base( aEncoding )

        {

        }

        #endregion

        #region From ArmBaseInstruction

        protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

        {

            TArmRegisterType reg1 = base.Rn;

            TArmRegisterType reg2 = this.Rm;

            return ( aRegister == reg1 || aRegister == reg2 );

        }

        #endregion

        #region From ArmInstruction

        public override bool Matches( uint aOpCode )

        {

            // If the following values hold true then it is not a data processing instruction at all.

            //

            // bit[25] == 0

            // bit[ 4] == 1

            // bit[ 7] == 1

            //

            bool match = base.Matches( aOpCode );

            if ( match )

            {

                SymUInt32 raw = aOpCode;

                if ( raw[ 25 ] == SymBit.EClear && raw[ 4 ] == SymBit.ESet && raw[ 7 ] == SymBit.ESet )

                {

                    match = false;

                }

            }

            //

            return match;

        }

        #endregion

        #region API

        #endregion

        #region Properties

        public virtual TShiftType ShiftType

        {

            get

            {

                TShiftType ret = (TShiftType) base.AIRawValue[ 6, 5 ].ToUInt();

                return ret;

            }

        }

        public TArmRegisterType Rm

        {

            get

            {

                TArmRegisterType ret = (TArmRegisterType) base.AIRawValue[ 3, 0 ].ToUInt();

                return ret;

            }

        }

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        #endregion

    }

}