1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 * 

    14 * Description:

    15 *

    16 */

    17 using System;

    18 using System.Collections.Generic;

    19 using System.Text;

    20 using SymbianUtils.BasicTypes;

    21 using SymbianStructuresLib.Arm.Registers;

    22 using SymbianStructuresLib.Arm.Instructions;

    23 using SymbianInstructionLib.Arm.Instructions.Common;

    24 

    25 namespace SymbianInstructionLib.Arm.Instructions.Thumb.DataProcessing

    26 {

    27     [ArmRef( "A7.1.9 ADD (7)",  "ADD SP, #<immed_7> * 4" )]

    28     [ArmRef( "A7.1.68 SUB (4)", "SUB SP, #<immed_7> * 4" )]

    29     public class Thumb_AddOrSubtract_SP : Thumb_AddOrSubtract

    30     {

    31         #region Constructors

    32         public Thumb_AddOrSubtract_SP()

    33         {

    34             //                         Type   immed_7

    35             base.SetMask( "10110000" + "#" + "#######" );

    36         }

    37         #endregion

    38 

    39         #region From ArmBaseInstruction

    40         protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

    41         {

    42             // SP acts as source & destination

    43             return ( aRegister == TArmRegisterType.EArmReg_SP );

    44         }

    45         #endregion

    46 

    47         #region From Thumb_AddOrSubtract

    48         public override TArmDataProcessingType OperationType

    49         {

    50             get

    51             {

    52                 TArmDataProcessingType ret = TArmDataProcessingType.ADD;

    53                 //

    54                 if ( base.AIRawValue[ 7 ] == SymBit.ESet )

    55                 {

    56                     ret = TArmDataProcessingType.SUB;

    57                 }

    58                 //

    59                 return ret;

    60             }

    61         }

    62         #endregion

    63 

    64         #region Properties

    65         public override uint Immediate

    66         {

    67             get

    68             {

    69                 uint rawValue = ( base.AIRawValue & 0x7F );

    70                 uint ret = rawValue * 4;

    71                 return ret;

    72             }

    73         }

    74 

    75         public override bool SuppliesImmediate

    76         {

    77             get { return true; }

    78         }

    79 

    80         public override TArmRegisterType Rd

    81         {

    82             get { return TArmRegisterType.EArmReg_SP; }

    83         }

    84         #endregion

    85 

    86         #region Internal methods

    87         #endregion

    88 

    89         #region Data members

    90         private static readonly SymMask KMaskRn = new SymMask( 0x38, SymMask.TShiftDirection.ERight, 3 );

    91         private static readonly SymMask KMaskRd = new SymMask( 0x7 );

    92         #endregion

    93     }

    94 }

    95