/*

* 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

{

    [ArmRef( "A7.1.29 LDR (2)", "LDR <Rd>, [<Rn>, <Rm>]" )]

    [ArmRef( "A7.1.59 STR (2)", "STR <Rd>, [<Rn>, <Rm>]" )]

    public class Thumb_LoadOrStore_Register : Thumb_LoadOrStore

    {

        #region Constructors

        public Thumb_LoadOrStore_Register()

        {

            //                    Type            Rm      Rn     Rd

            base.SetMask( "0101" + "#" + "00" + "###" + "###" + "###" );

        }

        #endregion

        #region From ArmBaseInstruction

        protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

        {

            bool ret = false;

            //

            TArmDataTransferType type = this.DataTransferType;

            if ( type == TArmDataTransferType.EStore )

            {

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

                // Rd = dest, Rn, Rm are source registers

                TArmRegisterType regN = this.Rn;

                TArmRegisterType regM = this.Rm;

                ret = ( aRegister == regN || aRegister == regM );

            }

            else if ( type == TArmDataTransferType.ELoad )

            {

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

                // Rd = source, Rn, Rm are destination registers

                TArmRegisterType regD = this.Rd;

                ret = ( aRegister == regD );

            }

            //

            return ret;

        }

        protected override bool DoQueryInvolvementAsDestination( TArmRegisterType aRegister )

        {

            bool ret = false;

            //

            TArmDataTransferType type = this.DataTransferType;

            if ( type == TArmDataTransferType.EStore )

            {

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

                // Rd = dest, Rn, Rm are source registers

                TArmRegisterType regD = this.Rd;

                ret = ( aRegister == regD );

            }

            else if ( type == TArmDataTransferType.ELoad )

            {

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

                // Rd = source, Rn, Rm are destination registers

                TArmRegisterType regN = this.Rn;

                TArmRegisterType regM = this.Rm;

                ret = ( aRegister == regN || aRegister == regM );

            }

            //

            return ret;

        }

        #endregion

        #region Framework API

        public override TArmDataTransferType DataTransferType

        {

            get

            {

                TArmDataTransferType ret = (TArmDataTransferType) base.AIRawValue[ 11 ];

                return ret;

            }

        }

        public override TArmRegisterType Rd

        {

            get

            {

                TArmRegisterType ret = (TArmRegisterType) Thumb_LoadOrStore.KBits2To0.Apply( base.AIRawValue );

                return ret;

            }

        }

        public TArmRegisterType Rn

        {

            get

            {

                TArmRegisterType ret = (TArmRegisterType) Thumb_LoadOrStore.KBits5To3.Apply( base.AIRawValue );

                return ret;

            }

        }

        public TArmRegisterType Rm

        {

            get

            {

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

                return ret;

            }

        }

        #endregion

        #region Properties

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        private static readonly SymMask KMaskRm = new SymMask( 0x1C0, SymMask.TShiftDirection.ERight, 6 );

        #endregion

    }

}