/*

* 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 class Arm_DataProcessing_Shift_Immediate : Arm_DataProcessing_Shift

    {

        #region Constructors

        public Arm_DataProcessing_Shift_Immediate()

            : base( TEncoding.EEncodingShiftsImmediate )

        {

            //             Cond             Op.      S       Rn       Rd  shift_imm    shift            Rm

            base.SetMask( "####" + "000" + "####" + "#" + "####" + "####" + "#####" +   "##" + "0" + "####" );

        }

        #endregion

        #region From Arm_DataProcessing

        public override bool SuppliesImmediate

        {

            get { return true; }

        }

        public override uint Immediate

        {

            get

            {

                byte ret = base.AIRawValue[ 11, 7 ];

                TShiftType type = base.ShiftType;

                // Some of the shift types use a value of 0 to mean 32 bits.

                if ( type == TShiftType.EShiftLogicalRight && ret == 0 )

                {

                    ret = 32;

                }

                else if ( type == TShiftType.EShiftArithmeticRight && ret == 0 )

                {

                    ret = 32;

                }

                return ret;

            }

        }

        #endregion

        #region Properties

        public override TShiftType ShiftType

        {

            get

            {

                TShiftType type = base.ShiftType;

                // Some of the immediate values can actually alter the shift types.

                uint immediate = Immediate;

                if ( immediate == 0 && type == TShiftType.EShiftRotateRight )

                {

                    // Rotate right by 32 bits is the same as an RRX.

                    type = TShiftType.EShiftRotateRightWithExtend;

                }

                else if ( immediate == 0 && type == TShiftType.EShiftLogicalLeft )

                {

                    // LSL of 0 is actually not a shift.

                    type = TShiftType.EShiftNone;

                }

                return type;

            }

        }

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        #endregion

    }

}