/*

* 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.DataTransfer

{

    public abstract class Thumb_LoadOrStore : ThumbInstruction

    {

        #region Constructors

        protected Thumb_LoadOrStore()

        {

            base.AIGroup = SymbianStructuresLib.Arm.Instructions.TArmInstructionGroup.EGroupDataTransfer;

        }

        #endregion

        #region From ArmBaseInstruction

        protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

        {

            bool ret = false;

            //

            TArmDataTransferType type = this.DataTransferType;

            if ( type == TArmDataTransferType.EStore )

            {

                // STR <Rd>, [<Rn>, #<immed_5> * 4]

                // Rd = dest, Rn is source

                //

                // Cannot test here, requires derived class to implement this check

            }

            else if ( type == TArmDataTransferType.ELoad )

            {

                // LDR <Rd>, [<Rn>, #<immed_5> * 4]

                // LDR <Rd>, [<Rn>, <Rm>]

                // LDR <Rd>, [PC, #<immed_8> * 4]

                // LDR <Rd>, [SP, #<immed_8> * 4]

                TArmRegisterType reg = this.Rd;

                ret = ( reg == aRegister );

            }

            //

            return ret;

        }

        protected override bool DoQueryInvolvementAsDestination( TArmRegisterType aRegister )

        {

            bool ret = false;

            //

            TArmDataTransferType type = this.DataTransferType;

            if ( type == TArmDataTransferType.EStore )

            {

                // STR <Rd>, [<Rn>, #<immed_5> * 4]

                // Rd = dest, Rn is source

                TArmRegisterType reg = this.Rd;

                ret = ( reg == aRegister );

            }

            else if ( type == TArmDataTransferType.ELoad )

            {

                // LDR <Rd>, [<Rn>, #<immed_5> * 4]

                // LDR <Rd>, [<Rn>, <Rm>]

                // LDR <Rd>, [PC, #<immed_8> * 4]

                // LDR <Rd>, [SP, #<immed_8> * 4]

                //

                // Cannot test here, requires derived class to implement this check

            }

            //

            return ret;

        }

        #endregion

        #region Framework API

        public abstract TArmDataTransferType DataTransferType

        {

            get;

        }

        public abstract TArmRegisterType Rd

        {

            get;

        }

        #endregion

        #region Properties

        #endregion

        #region Internal methods

        protected static readonly SymMask KBits2To0 = new SymMask( 0x7 );

        protected static readonly SymMask KBits5To3 = new SymMask( 0x38 );

        #endregion

        #region Data members

        #endregion

    }

}