| 1 | unit UBFTarget;
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| 2 |
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| 3 | {$mode delphi}
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| 4 |
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| 5 | interface
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| 6 |
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| 7 | uses
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| 8 | Classes, SysUtils, UTarget;
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| 9 |
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| 10 | type
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| 11 |
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| 12 | TMachineCommand = (cmNoOperation, cmInc, cmDec, cmPointerInc, cmPointerDec,
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| 13 | cmOutput, cmInput, cmLoopStart, cmLoopEnd, cmDebug, cmSet, cmMultipy);
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| 14 |
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| 15 | { TMachineOperation }
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| 16 |
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| 17 | TMachineOperation = record
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| 18 | Command: TMachineCommand;
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| 19 | Parameter: Integer;
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| 20 | RelIndex: Integer;
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| 21 | function Create(Command: TMachineCommand; Parameter, RelIndex: Integer): TMachineOperation;
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| 22 | end;
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| 23 |
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| 24 | TOptimizations = record
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| 25 | AddSub: Boolean;
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| 26 | Merge: Boolean;
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| 27 | RelativeIndexes: Boolean;
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| 28 | CopyMultiply: Boolean;
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| 29 | end;
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| 30 |
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| 31 | { TBFTarget }
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| 32 |
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| 33 | TBFTarget = class(TTarget)
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| 34 | private
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| 35 | function CheckClear: Boolean;
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| 36 | function CheckOccurenceSumParam(C: TMachineCommand): Integer;
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| 37 | function CheckOccurence(C: TMachineCommand): Integer;
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| 38 | procedure OptimizeAddSub;
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| 39 | procedure OptimizeMerge;
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| 40 | procedure OptimizeZeroInitMemory;
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| 41 | procedure OptimizeRelativeIndexes;
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| 42 | procedure OptimizeCopyMultiply;
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| 43 | protected
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| 44 | FProgram: array of TMachineOperation;
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| 45 | FProgramIndex: Integer;
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| 46 | procedure LoadProgram; override;
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| 47 | public
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| 48 | MemorySize: Integer;
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| 49 | MemoryMaxUsed: Integer;
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| 50 | CellSize: Integer;
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| 51 | Optimizations: TOptimizations;
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| 52 | constructor Create; override;
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| 53 | procedure OptimizeSource; override;
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| 54 | property ProgramIndex: Integer read FProgramIndex;
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| 55 | end;
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| 56 |
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| 57 |
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| 58 | implementation
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| 59 |
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| 60 | { TMachineOperation }
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| 61 |
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| 62 | function TMachineOperation.Create(Command: TMachineCommand; Parameter,
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| 63 | RelIndex: Integer): TMachineOperation;
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| 64 | begin
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| 65 | Result.Command := Command;
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| 66 | Result.Parameter := Parameter;
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| 67 | Result.RelIndex := RelIndex;
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| 68 | end;
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| 69 |
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| 70 | function TBFTarget.CheckClear: Boolean;
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| 71 | begin
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| 72 | Result := (FProgram[FProgramIndex].Command = cmLoopStart) and (Length(FProgram) >= FProgramIndex + 2) and
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| 73 | (((FProgram[FProgramIndex + 1].Command = cmDec) and (FProgram[FProgramIndex + 1].Parameter = 1)) or
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| 74 | ((FProgram[FProgramIndex + 1].Command = cmInc) and (FProgram[FProgramIndex + 1].Parameter = -1)))
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| 75 | and (FProgram[FProgramIndex + 2].Command = cmLoopEnd);
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| 76 | end;
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| 77 |
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| 78 | function TBFTarget.CheckOccurence(C: TMachineCommand): Integer;
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| 79 | begin
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| 80 | Result := 1;
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| 81 | while ((FProgramIndex + 1) < Length(FProgram)) and (FProgram[FProgramIndex + 1].Command = C) do begin
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| 82 | Inc(Result);
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| 83 | Inc(FProgramIndex);
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| 84 | end;
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| 85 | end;
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| 86 |
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| 87 | function TBFTarget.CheckOccurenceSumParam(C: TMachineCommand): Integer;
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| 88 | begin
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| 89 | Result := FProgram[FProgramIndex].Parameter;
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| 90 | while ((FProgramIndex + 1) < Length(FProgram)) and (FProgram[FProgramIndex + 1].Command = C) do begin
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| 91 | Inc(Result, FProgram[FProgramIndex + 1].Parameter);
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| 92 | Inc(FProgramIndex);
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| 93 | end;
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| 94 | end;
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| 95 |
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| 96 | procedure TBFTarget.OptimizeAddSub;
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| 97 | var
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| 98 | NewProgram: array of TMachineOperation;
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| 99 | NewProgramIndex: Integer;
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| 100 | begin
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| 101 | NewProgramIndex := 0;
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| 102 | SetLength(NewProgram, Length(FProgram));
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| 103 |
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| 104 | FProgramIndex := 0;
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| 105 | while (FProgramIndex < Length(FProgram)) do begin
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| 106 | case FProgram[FProgramIndex].Command of
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| 107 | cmPointerInc: begin
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| 108 | NewProgram[NewProgramIndex].Command := cmPointerInc;
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| 109 | NewProgram[NewProgramIndex].Parameter := CheckOccurenceSumParam(cmPointerInc);
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| 110 | end;
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| 111 | cmPointerDec: begin
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| 112 | NewProgram[NewProgramIndex].Command := cmPointerDec;
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| 113 | NewProgram[NewProgramIndex].Parameter := CheckOccurenceSumParam(cmPointerDec);
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| 114 | end;
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| 115 | cmInc: begin
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| 116 | NewProgram[NewProgramIndex].Command := cmInc;
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| 117 | NewProgram[NewProgramIndex].Parameter := CheckOccurenceSumParam(cmInc);
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| 118 | end;
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| 119 | cmDec: begin
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| 120 | NewProgram[NewProgramIndex].Command := cmDec;
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| 121 | NewProgram[NewProgramIndex].Parameter := CheckOccurenceSumParam(cmDec);
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| 122 | end;
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| 123 | else NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 124 | end;
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| 125 | DebugSteps.UpdateTargetPos(FProgramIndex, NewProgramIndex);
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| 126 | Inc(FProgramIndex);
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| 127 | Inc(NewProgramIndex);
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| 128 | end;
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| 129 | SetLength(NewProgram, NewProgramIndex);
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| 130 |
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| 131 | // Replace old program by new program
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| 132 | SetLength(FProgram, Length(NewProgram));
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| 133 | Move(Pointer(NewProgram)^, Pointer(FProgram)^, SizeOf(TMachineOperation) * Length(NewProgram));
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| 134 | end;
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| 135 |
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| 136 | procedure TBFTarget.OptimizeMerge;
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| 137 | var
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| 138 | NewProgram: array of TMachineOperation;
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| 139 | NewProgramIndex: Integer;
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| 140 | PreviousCommand: TMachineCommand;
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| 141 | begin
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| 142 | // Merge together cmInc, cmDec, cmSet
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| 143 | // Merge together cmPointerInc, cmPointerDec
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| 144 | PreviousCommand := cmNoOperation;
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| 145 | NewProgramIndex := 0;
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| 146 | SetLength(NewProgram, Length(FProgram));
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| 147 |
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| 148 | FProgramIndex := 0;
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| 149 | while (FProgramIndex < Length(FProgram)) do begin
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| 150 | case FProgram[FProgramIndex].Command of
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| 151 | cmPointerInc: begin
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| 152 | if PreviousCommand in [cmPointerInc, cmPointerDec] then begin
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| 153 | if NewProgram[NewProgramIndex - 1].Command = cmPointerInc then
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| 154 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter +
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| 155 | FProgram[FProgramIndex].Parameter
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| 156 | else if NewProgram[NewProgramIndex - 1].Command = cmPointerDec then
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| 157 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter -
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| 158 | FProgram[FProgramIndex].Parameter;
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| 159 | // If value negative then change command
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| 160 | if NewProgram[NewProgramIndex - 1].Parameter < 0 then begin
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| 161 | NewProgram[NewProgramIndex - 1].Parameter := -NewProgram[NewProgramIndex - 1].Parameter;
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| 162 | if NewProgram[NewProgramIndex - 1].Command = cmPointerInc then
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| 163 | NewProgram[NewProgramIndex - 1].Command := cmPointerDec
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| 164 | else NewProgram[NewProgramIndex - 1].Command := cmPointerInc;
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| 165 | end;
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| 166 | if NewProgram[NewProgramIndex - 1].Parameter = 0 then Dec(NewProgramIndex);
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| 167 | Dec(NewProgramIndex);
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| 168 | end else begin
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| 169 | NewProgram[NewProgramIndex].Command := cmPointerInc;
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| 170 | NewProgram[NewProgramIndex].Parameter := FProgram[FProgramIndex].Parameter;
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| 171 | end;
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| 172 | end;
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| 173 | cmPointerDec: begin
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| 174 | if PreviousCommand in [cmPointerInc, cmPointerDec] then begin
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| 175 | if NewProgram[NewProgramIndex - 1].Command = cmPointerDec then
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| 176 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter +
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| 177 | FProgram[FProgramIndex].Parameter
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| 178 | else if NewProgram[NewProgramIndex - 1].Command = cmPointerInc then
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| 179 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter -
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| 180 | FProgram[FProgramIndex].Parameter;
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| 181 | // If value negative then change command
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| 182 | if NewProgram[NewProgramIndex - 1].Parameter < 0 then begin
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| 183 | NewProgram[NewProgramIndex - 1].Parameter := -NewProgram[NewProgramIndex - 1].Parameter;
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| 184 | if NewProgram[NewProgramIndex - 1].Command = cmPointerInc then
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| 185 | NewProgram[NewProgramIndex - 1].Command := cmPointerDec
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| 186 | else NewProgram[NewProgramIndex - 1].Command := cmPointerInc;
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| 187 | end;
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| 188 | if NewProgram[NewProgramIndex - 1].Parameter = 0 then Dec(NewProgramIndex);
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| 189 | Dec(NewProgramIndex);
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| 190 | end else begin
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| 191 | NewProgram[NewProgramIndex].Command := cmPointerDec;
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| 192 | NewProgram[NewProgramIndex].Parameter := FProgram[FProgramIndex].Parameter;
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| 193 | end;
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| 194 | end;
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| 195 | cmInc: begin
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| 196 | if PreviousCommand in [cmInc, cmDec, cmSet] then begin
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| 197 | if NewProgram[NewProgramIndex - 1].Command in [cmInc, cmSet] then
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| 198 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter +
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| 199 | FProgram[FProgramIndex].Parameter
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| 200 | else if NewProgram[NewProgramIndex - 1].Command = cmDec then
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| 201 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter -
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| 202 | FProgram[FProgramIndex].Parameter;
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| 203 | // If value negative then change command
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| 204 | if (NewProgram[NewProgramIndex - 1].Parameter < 0) and (NewProgram[NewProgramIndex - 1].Command <> cmSet) then begin
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| 205 | NewProgram[NewProgramIndex - 1].Parameter := -NewProgram[NewProgramIndex - 1].Parameter;
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| 206 | if NewProgram[NewProgramIndex - 1].Command = cmInc then
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| 207 | NewProgram[NewProgramIndex - 1].Command := cmDec
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| 208 | else NewProgram[NewProgramIndex - 1].Command := cmInc;
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| 209 | end;
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| 210 | if NewProgram[NewProgramIndex - 1].Parameter = 0 then Dec(NewProgramIndex);
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| 211 | Dec(NewProgramIndex);
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| 212 | end else begin
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| 213 | NewProgram[NewProgramIndex].Command := cmInc;
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| 214 | NewProgram[NewProgramIndex].Parameter := FProgram[FProgramIndex].Parameter;
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| 215 | end;
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| 216 | end;
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| 217 | cmDec: begin
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| 218 | if PreviousCommand in [cmInc, cmDec, cmSet] then begin
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| 219 | if NewProgram[NewProgramIndex - 1].Command = cmDec then
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| 220 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter +
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| 221 | FProgram[FProgramIndex].Parameter
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| 222 | else if NewProgram[NewProgramIndex - 1].Command in [cmInc, cmSet] then
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| 223 | NewProgram[NewProgramIndex - 1].Parameter := NewProgram[NewProgramIndex - 1].Parameter -
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| 224 | FProgram[FProgramIndex].Parameter;
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| 225 | // If value negative then change command
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| 226 | if (NewProgram[NewProgramIndex - 1].Parameter < 0) and (NewProgram[NewProgramIndex - 1].Command <> cmSet) then begin
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| 227 | NewProgram[NewProgramIndex - 1].Parameter := -NewProgram[NewProgramIndex - 1].Parameter;
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| 228 | if NewProgram[NewProgramIndex - 1].Command = cmInc then
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| 229 | NewProgram[NewProgramIndex - 1].Command := cmDec
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| 230 | else NewProgram[NewProgramIndex - 1].Command := cmInc;
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| 231 | end;
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| 232 | if NewProgram[NewProgramIndex - 1].Parameter = 0 then Dec(NewProgramIndex);
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| 233 | Dec(NewProgramIndex);
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| 234 | end else begin
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| 235 | NewProgram[NewProgramIndex].Command := cmDec;
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| 236 | NewProgram[NewProgramIndex].Parameter := FProgram[FProgramIndex].Parameter;
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| 237 | end;
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| 238 | end;
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| 239 | cmSet: begin
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| 240 | if PreviousCommand in [cmInc, cmDec, cmSet] then begin
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| 241 | // Set overrides value of previous commands
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| 242 | Dec(NewProgramIndex);
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| 243 | NewProgram[NewProgramIndex].Command := cmSet;
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| 244 | NewProgram[NewProgramIndex].Parameter := FProgram[FProgramIndex].Parameter;
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| 245 | end else begin
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| 246 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 247 | end;
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| 248 | end;
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| 249 | cmLoopStart: begin
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| 250 | if CheckClear then begin
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| 251 | NewProgram[NewProgramIndex] := TMachineOperation.Create(cmSet, 0, 0);
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| 252 | Inc(FProgramIndex, 2);
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| 253 | end else begin
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| 254 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 255 | end;
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| 256 | end;
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| 257 | else NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 258 | end;
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| 259 | PreviousCommand := FProgram[FProgramIndex].Command;
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| 260 | DebugSteps.UpdateTargetPos(FProgramIndex, NewProgramIndex);
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| 261 | Inc(FProgramIndex);
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| 262 | Inc(NewProgramIndex);
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| 263 | end;
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| 264 | SetLength(NewProgram, NewProgramIndex);
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| 265 |
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| 266 | // Replace old program by new program
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| 267 | SetLength(FProgram, Length(NewProgram));
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| 268 | Move(Pointer(NewProgram)^, Pointer(FProgram)^, SizeOf(TMachineOperation) * Length(NewProgram));
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| 269 | end;
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| 270 |
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| 271 | procedure TBFTarget.OptimizeZeroInitMemory;
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| 272 | begin
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| 273 | // Here Optimizations related to assumption that initial memory is filled with zeroes
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| 274 | // Then code for constants preparation can be translated to cmSet commands
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| 275 | // To eliminate also loops for building constants code need to be somehow interpretted partialy
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| 276 | end;
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| 277 |
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| 278 | procedure TBFTarget.OptimizeRelativeIndexes;
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| 279 | var
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| 280 | NewProgram: array of TMachineOperation;
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| 281 | NewProgramIndex: Integer;
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| 282 | RelIndex: Integer;
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| 283 | begin
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| 284 | NewProgramIndex := 0;
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| 285 | SetLength(NewProgram, Length(FProgram));
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| 286 |
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| 287 | RelIndex := 0;
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| 288 | FProgramIndex := 0;
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| 289 | while (FProgramIndex < Length(FProgram)) do begin
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| 290 | case FProgram[FProgramIndex].Command of
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| 291 | cmPointerInc: begin
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| 292 | RelIndex := RelIndex + FProgram[FProgramIndex].Parameter;
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| 293 | Dec(NewProgramIndex);
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| 294 | end;
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| 295 | cmPointerDec: begin
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| 296 | RelIndex := RelIndex - FProgram[FProgramIndex].Parameter;
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| 297 | Dec(NewProgramIndex);
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| 298 | end;
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| 299 | cmInc, cmDec, cmInput, cmOutput, cmSet: begin
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| 300 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 301 | NewProgram[NewProgramIndex].RelIndex :=
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| 302 | NewProgram[NewProgramIndex].RelIndex + RelIndex;
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| 303 | end;
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| 304 | cmLoopStart, cmLoopEnd: begin
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| 305 | if RelIndex > 0 then begin
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| 306 | NewProgram[NewProgramIndex] := TMachineOperation.Create(cmPointerInc,
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| 307 | RelIndex, 0);
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| 308 | Inc(NewProgramIndex);
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| 309 | RelIndex := 0;
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| 310 | end else
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| 311 | if RelIndex < 0 then begin
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| 312 | NewProgram[NewProgramIndex] := TMachineOperation.Create(cmPointerDec,
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| 313 | Abs(RelIndex), 0);
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| 314 | Inc(NewProgramIndex);
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| 315 | RelIndex := 0;
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| 316 | end;
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| 317 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 318 | end;
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| 319 | else raise Exception.Create(Format('Unsupported command %d', [FProgram[FProgramIndex].Command]));
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| 320 | end;
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| 321 | DebugSteps.UpdateTargetPos(FProgramIndex, NewProgramIndex);
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| 322 | Inc(FProgramIndex);
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| 323 | Inc(NewProgramIndex);
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| 324 | end;
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| 325 | SetLength(NewProgram, NewProgramIndex);
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| 326 |
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| 327 | // Replace old program by new program
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| 328 | SetLength(FProgram, Length(NewProgram));
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| 329 | Move(Pointer(NewProgram)^, Pointer(FProgram)^, SizeOf(TMachineOperation) *
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| 330 | Length(NewProgram));
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| 331 | end;
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| 332 |
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| 333 | procedure TBFTarget.OptimizeCopyMultiply;
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| 334 | var
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| 335 | NewProgram: array of TMachineOperation;
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| 336 | NewProgramIndex: Integer;
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| 337 | ProcessLoop: Boolean;
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| 338 | PointerChange: Integer;
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| 339 | NumberOfBaseDecrement: Integer;
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| 340 | LoopStartIndex: Integer;
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| 341 | LoopStartIndexNew: Integer;
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| 342 | begin
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| 343 | NewProgramIndex := 0;
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| 344 | SetLength(NewProgram, Length(FProgram));
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| 345 |
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| 346 | NumberOfBaseDecrement := 0;
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| 347 | ProcessLoop := False;
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| 348 | FProgramIndex := 0;
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| 349 | PointerChange := 0;
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| 350 | while (FProgramIndex < Length(FProgram)) do begin
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| 351 | case FProgram[FProgramIndex].Command of
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| 352 | cmPointerInc: begin
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| 353 | PointerChange := PointerChange + FProgram[FProgramIndex].Parameter;
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| 354 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 355 | end;
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| 356 | cmPointerDec: begin
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| 357 | PointerChange := PointerChange - FProgram[FProgramIndex].Parameter;
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| 358 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 359 | end;
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| 360 | cmInc: begin
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| 361 | if not ProcessLoop then begin
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| 362 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 363 | end else begin
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| 364 | if ((FProgram[FProgramIndex].RelIndex + PointerChange) <> 0) then begin
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| 365 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 366 | NewProgram[NewProgramIndex].Command := cmMultipy;
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| 367 | end else Dec(NewProgramIndex);
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| 368 | end;
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| 369 | end;
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| 370 | cmDec: begin
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| 371 | if not ProcessLoop then begin
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| 372 | if (PointerChange = 0) and (FProgram[FProgramIndex].RelIndex = 0) and
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| 373 | (FProgram[FProgramIndex].Parameter = 1) then
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| 374 | Inc(NumberOfBaseDecrement);
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| 375 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 376 | end else begin
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| 377 | if ((FProgram[FProgramIndex].RelIndex + PointerChange) <> 0) then begin
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| 378 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 379 | NewProgram[NewProgramIndex].Command := cmMultipy;
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| 380 | NewProgram[NewProgramIndex].Parameter := -FProgram[FProgramIndex].Parameter;
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| 381 | end else Dec(NewProgramIndex);
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| 382 | end;
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| 383 | end;
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| 384 | cmInput, cmOutput: begin
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| 385 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 386 | Inc(NumberOfBaseDecrement, 2);
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| 387 | end;
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| 388 | cmSet: begin
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| 389 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 390 | Inc(NumberOfBaseDecrement, 2);
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| 391 | end;
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| 392 | cmLoopStart: begin
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| 393 | if not ProcessLoop then begin
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| 394 | NumberOfBaseDecrement := 0;
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| 395 | PointerChange := 0;
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| 396 | LoopStartIndex := FProgramIndex;
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| 397 | LoopStartIndexNew := NewProgramIndex;
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| 398 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 399 | end else begin
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| 400 | Dec(NewProgramIndex);
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| 401 | end;
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| 402 | end;
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| 403 | cmLoopEnd: begin
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| 404 | if not ProcessLoop then begin
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| 405 | if (NumberOfBaseDecrement = 1) and (PointerChange = 0) then begin
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| 406 | FProgramIndex := LoopstartIndex - 1;
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| 407 | NewProgramIndex := LoopStartIndexNew - 1;
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| 408 | ProcessLoop := True;
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| 409 | end else begin
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| 410 | NewProgram[NewProgramIndex] := FProgram[FProgramIndex];
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| 411 | end;
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| 412 | end else begin
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| 413 | NewProgram[NewProgramIndex] := TMachineOperation.Create(cmSet, 0, 0);
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| 414 | ProcessLoop := False;
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| 415 | NumberOfBaseDecrement := 0;
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| 416 | end;
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| 417 | end;
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| 418 | else raise Exception.Create(Format('Unsupported command %d', [FProgram[FProgramIndex].Command]));
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| 419 | end;
|
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| 420 | DebugSteps.UpdateTargetPos(FProgramIndex, NewProgramIndex);
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| 421 | Inc(FProgramIndex);
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|---|
| 422 | Inc(NewProgramIndex);
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|---|
| 423 | end;
|
|---|
| 424 | SetLength(NewProgram, NewProgramIndex);
|
|---|
| 425 |
|
|---|
| 426 | // Replace old program by new program
|
|---|
| 427 | SetLength(FProgram, Length(NewProgram));
|
|---|
| 428 | Move(Pointer(NewProgram)^, Pointer(FProgram)^, SizeOf(TMachineOperation) *
|
|---|
| 429 | Length(NewProgram));
|
|---|
| 430 | end;
|
|---|
| 431 |
|
|---|
| 432 | procedure TBFTarget.LoadProgram;
|
|---|
| 433 | var
|
|---|
| 434 | I: Integer;
|
|---|
| 435 | begin
|
|---|
| 436 | inherited;
|
|---|
| 437 | DebugSteps.Clear;
|
|---|
| 438 | SetLength(FProgram, Length(FSourceCode));
|
|---|
| 439 | FProgramIndex := 0;
|
|---|
| 440 | for I := 1 to Length(FSourceCode) do begin
|
|---|
| 441 | case FSourceCode[I] of
|
|---|
| 442 | '+': begin
|
|---|
| 443 | FProgram[FProgramIndex] := TMachineOperation.Create(cmInc, 1, 0);
|
|---|
| 444 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 445 | end;
|
|---|
| 446 | '-': begin
|
|---|
| 447 | FProgram[FProgramIndex] := TMachineOperation.Create(cmDec, 1, 0);
|
|---|
| 448 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 449 | end;
|
|---|
| 450 | '>': begin
|
|---|
| 451 | FProgram[FProgramIndex] := TMachineOperation.Create(cmPointerInc, 1, 0);
|
|---|
| 452 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 453 | end;
|
|---|
| 454 | '<': begin
|
|---|
| 455 | FProgram[FProgramIndex] := TMachineOperation.Create(cmPointerDec, 1, 0);
|
|---|
| 456 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 457 | end;
|
|---|
| 458 | ',': begin
|
|---|
| 459 | FProgram[FProgramIndex] := TMachineOperation.Create(cmInput, 0, 0);
|
|---|
| 460 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 461 | end;
|
|---|
| 462 | '.': begin
|
|---|
| 463 | FProgram[FProgramIndex] := TMachineOperation.Create(cmOutput, 0, 0);
|
|---|
| 464 | DebugSteps.AddStep(I - 1, FProgramIndex, soNormal);
|
|---|
| 465 | end;
|
|---|
| 466 | '[': begin
|
|---|
| 467 | FProgram[FProgramIndex] := TMachineOperation.Create(cmLoopStart, 0, 0);
|
|---|
| 468 | DebugSteps.AddStep(I - 1, FProgramIndex, soStepIn);
|
|---|
| 469 | end;
|
|---|
| 470 | ']': begin
|
|---|
| 471 | FProgram[FProgramIndex] := TMachineOperation.Create(cmLoopEnd, 0 ,0);
|
|---|
| 472 | DebugSteps.AddStep(I - 1, FProgramIndex, soStepOut);
|
|---|
| 473 | end
|
|---|
| 474 | else Dec(FProgramIndex);
|
|---|
| 475 | end;
|
|---|
| 476 | Inc(FProgramIndex);
|
|---|
| 477 | end;
|
|---|
| 478 | SetLength(FProgram, FProgramIndex);
|
|---|
| 479 | end;
|
|---|
| 480 |
|
|---|
| 481 | constructor TBFTarget.Create;
|
|---|
| 482 | begin
|
|---|
| 483 | inherited Create;
|
|---|
| 484 | MemorySize := 30000;
|
|---|
| 485 | CellSize := 256;
|
|---|
| 486 | end;
|
|---|
| 487 |
|
|---|
| 488 | procedure TBFTarget.OptimizeSource;
|
|---|
| 489 | var
|
|---|
| 490 | OldLength: Integer;
|
|---|
| 491 | begin
|
|---|
| 492 | inherited;
|
|---|
| 493 | if Optimizations.AddSub then OptimizeAddSub;
|
|---|
| 494 | if Optimizations.Merge then
|
|---|
| 495 | repeat
|
|---|
| 496 | OldLength := Length(FProgram);
|
|---|
| 497 | OptimizeMerge;
|
|---|
| 498 | until Length(FProgram) = OldLength;
|
|---|
| 499 | OptimizeZeroInitMemory;
|
|---|
| 500 | if Optimizations.RelativeIndexes then OptimizeRelativeIndexes;
|
|---|
| 501 | if Optimizations.CopyMultiply then OptimizeCopyMultiply;
|
|---|
| 502 | end;
|
|---|
| 503 |
|
|---|
| 504 |
|
|---|
| 505 |
|
|---|
| 506 | end.
|
|---|
| 507 |
|
|---|
