/*

* 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 SymbianUtils.BasicTypes;

using SymbianStructuresLib.Arm.Registers;

using SymbianStructuresLib.Arm.Instructions;

using SymbianInstructionLib.Arm.Instructions.Common;

namespace SymbianInstructionLib.Arm.Instructions.Thumb.DataProcessing

{

    [ArmRef( "A7.1.7 ADD (5)", "ADD <Rd>, PC, #<immed_8> * 4" )]

    [ArmRef( "A7.1.8 ADD (6)", "ADD <Rd>, SP, #<immed_8> * 4" )]

    public class Thumb_Add_SPOrPC : Thumb_AddOrSubtract

    {

        #region Constructors

        public Thumb_Add_SPOrPC()

        {

            //                     Type    Rd      immed_8

            base.SetMask( "1010" + "#" + "###" + "########" );

        }

        #endregion

        #region From ArmBaseInstruction

        protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

        {

            // SP or PC acts as source

            TArmRegisterType reg = this.RelativeRegister;

            return ( aRegister == reg );

        }

        #endregion

        #region From Thumb_AddOrSubtract

        public override TArmRegisterType Rd

        {

            get

            {

                TArmRegisterType ret = (TArmRegisterType) KMaskRd.Apply( base.AIRawValue );

                return ret;

            }

        }

        public TArmRegisterType RelativeRegister

        {

            get

            {

                SymBit bit11 = base.AIRawValue[ 11 ];

                TArmRegisterType ret = TArmRegisterType.EArmReg_PC;

                if ( bit11 == SymBit.ESet )

                {

                    ret = TArmRegisterType.EArmReg_SP;

                }

                return ret;

            }

        }

        public override TArmDataProcessingType OperationType

        {

            get { return TArmDataProcessingType.ADD; }

        }

        public override uint Immediate

        {

            get

            {

                uint rawValue = ( base.AIRawValue & 0xFF );

                uint ret = rawValue * 4;

                return ret;

            }

        }

        public override bool SuppliesImmediate

        {

            get { return true; }

        }

        #endregion

        #region Properties

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        private static readonly SymMask KMaskRd = new SymMask( 0x700, SymMask.TShiftDirection.ERight, 8 );

        #endregion

    }

}