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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 using System; |
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18 using System.Collections.Generic; |
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19 using System.Text; |
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20 using System.ComponentModel; |
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21 using SymbianUtils.BasicTypes; |
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22 using SymbianStructuresLib.Arm.Registers; |
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23 using SymbianInstructionLib.Arm.Instructions.Common; |
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24 |
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25 namespace SymbianInstructionLib.Arm.Instructions.Arm.DataProcessing |
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26 { |
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27 public class Arm_DataProcessing_Shift_Immediate : Arm_DataProcessing_Shift |
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28 { |
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29 #region Constructors |
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30 public Arm_DataProcessing_Shift_Immediate() |
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31 : base( TEncoding.EEncodingShiftsImmediate ) |
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32 { |
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33 // Cond Op. S Rn Rd shift_imm shift Rm |
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34 base.SetMask( "####" + "000" + "####" + "#" + "####" + "####" + "#####" + "##" + "0" + "####" ); |
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35 } |
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36 #endregion |
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37 |
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38 #region From Arm_DataProcessing |
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39 public override bool SuppliesImmediate |
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40 { |
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41 get { return true; } |
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42 } |
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43 |
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44 public override uint Immediate |
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45 { |
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46 get |
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47 { |
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48 byte ret = base.AIRawValue[ 11, 7 ]; |
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49 |
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50 TShiftType type = base.ShiftType; |
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51 |
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52 // Some of the shift types use a value of 0 to mean 32 bits. |
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53 if ( type == TShiftType.EShiftLogicalRight && ret == 0 ) |
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54 { |
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55 ret = 32; |
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56 } |
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57 else if ( type == TShiftType.EShiftArithmeticRight && ret == 0 ) |
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58 { |
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59 ret = 32; |
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60 } |
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61 |
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62 return ret; |
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63 } |
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64 } |
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65 #endregion |
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66 |
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67 #region Properties |
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68 public override TShiftType ShiftType |
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69 { |
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70 get |
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71 { |
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72 TShiftType type = base.ShiftType; |
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73 |
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74 // Some of the immediate values can actually alter the shift types. |
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75 uint immediate = Immediate; |
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76 if ( immediate == 0 && type == TShiftType.EShiftRotateRight ) |
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77 { |
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78 // Rotate right by 32 bits is the same as an RRX. |
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79 type = TShiftType.EShiftRotateRightWithExtend; |
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80 } |
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81 else if ( immediate == 0 && type == TShiftType.EShiftLogicalLeft ) |
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82 { |
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83 // LSL of 0 is actually not a shift. |
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84 type = TShiftType.EShiftNone; |
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85 } |
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86 |
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87 return type; |
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88 } |
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89 } |
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90 #endregion |
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91 |
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92 #region Internal methods |
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93 #endregion |
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94 |
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95 #region Data members |
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96 #endregion |
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97 } |
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98 } |
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99 |