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.Registers.VFP;

    23 using SymbianStructuresLib.Arm.Instructions;

    24 using SymbianInstructionLib.Arm.Instructions.Common;

    25 

    26 namespace SymbianInstructionLib.Arm.Instructions.Arm.DataTransfer

    27 {

    28     public abstract class Arm_LoadOrStoreMultiple_VFP : Arm_LoadOrStoreMultiple

    29     {

    30         #region Constructors

    31         protected Arm_LoadOrStoreMultiple_VFP()

    32         {

    33             base.AITarget = TArmInstructionTarget.EVectorFloatingPoint;

    34         }

    35         #endregion

    36 

    37         #region Frin Arm_LoadOrStoreMultiple

    38         public override TArmRegisterType BaseRegister

    39         {

    40             get

    41             {

    42                 SymMask mask = new SymMask( 0xF << 16, SymMask.TShiftDirection.ERight, 16 );

    43                 TArmRegisterType ret = (TArmRegisterType) mask.Apply( base.AIRawValue );

    44                 return ret;

    45             }

    46         }

    47         #endregion

    48 

    49         #region Framework API

    50         public abstract TArmRegisterTypeVFP FirstRegister

    51         {

    52             get;

    53         }

    54 

    55         public abstract TArmRegisterTypeVFP[] Registers

    56         {

    57             get;

    58         }

    59         #endregion

    60 

    61         #region Properties

    62         public TArmInstructionAddressingModeVFP AddressingMode

    63         {

    64             get

    65             {

    66                 // The address mode is a combination of P U and W bits.

    67                 TArmInstructionAddressingModeVFP ret = TArmInstructionAddressingModeVFP.EUndefined;

    68 

    69                 // First extract P and U bits. NB: We shift this only 22 to the right because

    70                 // we are about to inject the 'W' bit at bit zero.

    71                 SymMask maskPU = new SymMask( 3u << 23, SymMask.TShiftDirection.ERight, 22 );

    72                 uint bits = maskPU.Apply( base.AIRawValue );

    73 

    74                 // Extract W bit

    75                 SymBit wBit = base.AIRawValue[ ArmInstruction.KBitIndexW ];

    76                 bits |= (uint) wBit;

    77 

    78                 switch ( bits )

    79                 {

    80                 case 0:

    81                 case 1:

    82                 case 7:

    83                 default:

    84                     break;

    85                 //         P U W 

    86                 case 2: // 0 1 0

    87                     ret = TArmInstructionAddressingModeVFP.EUnindexed;

    88                     break;

    89                 case 3: // 0 1 0

    90                     ret = TArmInstructionAddressingModeVFP.EIncrement;

    91                     break;

    92                 case 4: // 1 0 0

    93                     ret = TArmInstructionAddressingModeVFP.EOffsetNegative;

    94                     break;

    95                 case 5: // 1 0 1

    96                     ret = TArmInstructionAddressingModeVFP.EDecrement;

    97                     break;

    98                 case 6: // 1 1 0

    99                     ret = TArmInstructionAddressingModeVFP.EOffsetPositive;

   100                     break;

   101                 }

   102                 //

   103                 return ret;

   104             }

   105         }

   106 

   107         public uint Offset

   108         {

   109             get

   110             {

   111                 uint offset = base.AIRawValue & 0xFF;

   112                 return offset;

   113             }

   114         }

   115         #endregion

   116 

   117         #region Internal constants

   118         protected readonly static SymMask KMaskFirstReg = new SymMask( 0xF000, SymMask.TShiftDirection.ERight, 12 );

   119         #endregion

   120 

   121         #region Data members

   122         #endregion

   123     }

   124 }

   125