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

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

    29     public class Thumb_Add_SPOrPC : Thumb_AddOrSubtract

    30     {

    31         #region Constructors

    32         public Thumb_Add_SPOrPC()

    33         {

    34             //                     Type    Rd      immed_8

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

    36         }

    37         #endregion

    38 

    39         #region From ArmBaseInstruction

    40         protected override bool DoQueryInvolvementAsSource( TArmRegisterType aRegister )

    41         {

    42             // SP or PC acts as source

    43             TArmRegisterType reg = this.RelativeRegister;

    44             return ( aRegister == reg );

    45         }

    46         #endregion

    47 

    48         #region From Thumb_AddOrSubtract

    49         public override TArmRegisterType Rd

    50         {

    51             get

    52             {

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

    54                 return ret;

    55             }

    56         }

    57 

    58         public TArmRegisterType RelativeRegister

    59         {

    60             get

    61             {

    62                 SymBit bit11 = base.AIRawValue[ 11 ];

    63                 TArmRegisterType ret = TArmRegisterType.EArmReg_PC;

    64                 if ( bit11 == SymBit.ESet )

    65                 {

    66                     ret = TArmRegisterType.EArmReg_SP;

    67                 }

    68                 return ret;

    69             }

    70         }

    71 

    72         public override TArmDataProcessingType OperationType

    73         {

    74             get { return TArmDataProcessingType.ADD; }

    75         }

    76 

    77         public override uint Immediate

    78         {

    79             get

    80             {

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

    82                 uint ret = rawValue * 4;

    83                 return ret;

    84             }

    85         }

    86 

    87         public override bool SuppliesImmediate

    88         {

    89             get { return true; }

    90         }

    91         #endregion

    92 

    93         #region Properties

    94         #endregion

    95 

    96         #region Internal methods

    97         #endregion

    98 

    99         #region Data members

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

   101         #endregion

   102     }

   103 }

   104