| 1 | unit UCompilerPascal;
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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, UInstructionReader, UOpcode, UCpu, strutils;
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| 9 |
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| 10 | type
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| 11 |
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| 12 | { TCompilerPascal }
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| 13 |
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| 14 | TCompilerPascal = class
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| 15 | private
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| 16 | OpcodeDefs: TOpcodeDefs;
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| 17 | Instructions: array[TOpcode] of TInstructionEvent;
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| 18 | Indent: Integer;
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| 19 | Labels: TStringList;
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| 20 | procedure InstConvert;
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| 21 | procedure InstNop;
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| 22 | procedure InstHalt;
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| 23 | procedure InstLoad;
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| 24 | procedure InstLoadImmediate;
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| 25 | procedure InstJump;
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| 26 | procedure InstJumpZero;
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| 27 | procedure InstJumpNotZero;
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| 28 | procedure InstJumpRel;
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| 29 | procedure InstJumpRelZero;
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| 30 | procedure InstJumpRelNotZero;
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| 31 | procedure InstTest;
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| 32 | procedure InstNeg;
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| 33 | procedure InstClear;
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| 34 | procedure InstLoadMem;
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| 35 | procedure InstStoreMem;
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| 36 | procedure InstExchg;
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| 37 | procedure InstPush;
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| 38 | procedure InstPop;
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| 39 | procedure InstCall;
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| 40 | procedure InstRet;
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| 41 | procedure InstAdd;
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| 42 | procedure InstAddi;
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| 43 | procedure InstSub;
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| 44 | procedure InstSubi;
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| 45 | procedure InstMul;
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| 46 | procedure InstDiv;
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| 47 | procedure InstMod;
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| 48 | procedure InstInc;
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| 49 | procedure InstDec;
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| 50 | procedure InstIn;
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| 51 | procedure InstOut;
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| 52 | procedure InstShr;
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| 53 | procedure InstShl;
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| 54 | procedure InstAnd;
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| 55 | procedure InstOr;
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| 56 | procedure InstXor;
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| 57 | procedure InstLddr;
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| 58 | procedure InstLdir;
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| 59 | procedure InstDataPrefix8;
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| 60 | procedure InstDataPrefix16;
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| 61 | procedure InstDataPrefix32;
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| 62 | procedure InstDataPrefix64;
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| 63 | procedure InstDataSize;
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| 64 | procedure InstAddrPrefix8;
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| 65 | procedure InstAddrPrefix16;
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| 66 | procedure InstAddrPrefix32;
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| 67 | procedure InstAddrPrefix64;
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| 68 | procedure InstAddrSize;
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| 69 | procedure InitInstructions;
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| 70 | procedure AddLine(Text: string);
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| 71 | function GetRegister(Index: Byte; BitWidth: TBitWidth): string;
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| 72 | function GetMemory(Offset: string; BitWidth: TBitWidth): string;
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| 73 | function GetJump(LabelName: string): string;
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| 74 | public
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| 75 | Reader: TInstructionReader;
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| 76 | Output: string;
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| 77 | procedure Compile;
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| 78 | constructor Create;
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| 79 | destructor Destroy; override;
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| 80 | end;
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| 81 |
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| 82 |
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| 83 | implementation
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| 84 |
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| 85 | const
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| 86 | BitWidthSuffix: array[TBitWidth] of string = ('', '.B', '.W', '.D', '.Q');
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| 87 | BitWidthPtrType: array[TBitWidth] of string = ('', 'PByte', 'PWord', 'PDWord', 'PQWord');
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| 88 |
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| 89 | { TCompilerPascal }
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| 90 |
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| 91 | procedure TCompilerPascal.InstConvert;
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| 92 | var
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| 93 | R: Byte;
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| 94 | begin
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| 95 | R := Reader.Read8;
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| 96 | AddLine(GetRegister(R, Reader.AddrSize) + ' := ' + GetRegister(R, Reader.DataSize) + ';');
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| 97 | end;
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| 98 |
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| 99 | procedure TCompilerPascal.InstNop;
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| 100 | begin
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| 101 | end;
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| 102 |
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| 103 | procedure TCompilerPascal.InstHalt;
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| 104 | begin
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| 105 | AddLine('Exit;');
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| 106 | end;
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| 107 |
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| 108 | procedure TCompilerPascal.InstLoad;
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| 109 | var
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| 110 | R1, R2: Byte;
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| 111 | begin
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| 112 | R1 := Reader.Read8;
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| 113 | R2 := Reader.Read8;
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| 114 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R2, Reader.DataSize) + ';');
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| 115 | end;
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| 116 |
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| 117 | procedure TCompilerPascal.InstLoadImmediate;
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| 118 | var
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| 119 | R: Byte;
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| 120 | begin
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| 121 | R := Reader.Read8;
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| 122 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + IntToHexEx(Reader.ReadData, -1, '$') + ';');
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| 123 | end;
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| 124 |
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| 125 | procedure TCompilerPascal.InstJump;
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| 126 | begin
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| 127 | AddLine(GetJump('L' + IntToStr(Reader.ReadAddress)));
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| 128 | end;
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| 129 |
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| 130 | procedure TCompilerPascal.InstJumpZero;
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| 131 | begin
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| 132 | AddLine('if Zero then ' + GetJump('L' + IntToStr(Reader.ReadAddress)));
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| 133 | end;
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| 134 |
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| 135 | procedure TCompilerPascal.InstJumpNotZero;
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| 136 | begin
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| 137 | AddLine('if not Zero then ' + GetJump('L' + IntToStr(Reader.ReadAddress)));
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| 138 | end;
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| 139 |
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| 140 | procedure TCompilerPascal.InstJumpRel;
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| 141 | var
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| 142 | Addr: TAddressSigned;
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| 143 | begin
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| 144 | Addr := Reader.ReadAddressSigned;
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| 145 | AddLine(GetJump('L' + IntToStr(Reader.IP + Addr)));
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| 146 | end;
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| 147 |
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| 148 | procedure TCompilerPascal.InstJumpRelZero;
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| 149 | var
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| 150 | Addr: TAddressSigned;
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| 151 | begin
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| 152 | Addr := Reader.ReadAddressSigned;
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| 153 | AddLine('if Zero then ' + GetJump('L' + IntToStr(Reader.IP + Addr)));
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| 154 | end;
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| 155 |
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| 156 | procedure TCompilerPascal.InstJumpRelNotZero;
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| 157 | var
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| 158 | Addr: TAddressSigned;
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| 159 | begin
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| 160 | Addr := Reader.ReadAddressSigned;
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| 161 | AddLine('if not Zero then ' + GetJump('L' + IntToStr(Reader.IP + Addr)));
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| 162 | end;
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| 163 |
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| 164 | procedure TCompilerPascal.InstTest;
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| 165 | var
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| 166 | R: TRegIndex;
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| 167 | begin
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| 168 | R := Reader.Read8;
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| 169 | AddLine('Zero := ' + GetRegister(R, Reader.DataSize) + ' = 0;');
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| 170 | end;
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| 171 |
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| 172 | procedure TCompilerPascal.InstNeg;
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| 173 | var
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| 174 | R: TRegIndex;
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| 175 | begin
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| 176 | R := Reader.Read8;
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| 177 | AddLine(GetRegister(R, Reader.DataSize) + ' := -' + GetRegister(R, Reader.DataSize) + ';');
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| 178 | end;
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| 179 |
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| 180 | procedure TCompilerPascal.InstClear;
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| 181 | var
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| 182 | R: TRegIndex;
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| 183 | begin
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| 184 | R := Reader.Read8;
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| 185 | AddLine(GetRegister(R, Reader.DataSize) + ' := 0;');
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| 186 | end;
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| 187 |
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| 188 | procedure TCompilerPascal.InstLoadMem;
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| 189 | var
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| 190 | R1, R2: Byte;
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| 191 | begin
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| 192 | R1 := Reader.Read8;
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| 193 | R2 := Reader.Read8;
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| 194 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' +
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| 195 | GetMemory(GetRegister(R2, Reader.AddrSize), Reader.AddrSize) + ';');
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| 196 | end;
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| 197 |
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| 198 | procedure TCompilerPascal.InstStoreMem;
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| 199 | var
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| 200 | R1, R2: Byte;
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| 201 | begin
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| 202 | R1 := Reader.Read8;
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| 203 | R2 := Reader.Read8;
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| 204 | AddLine(GetMemory(GetRegister(R1, Reader.AddrSize), Reader.AddrSize) + ' := ' +
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| 205 | GetRegister(R2, Reader.DataSize) + ';');
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| 206 | end;
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| 207 |
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| 208 | procedure TCompilerPascal.InstExchg;
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| 209 | var
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| 210 | R1, R2: Byte;
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| 211 | begin
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| 212 | R1 := Reader.Read8;
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| 213 | R2 := Reader.Read8;
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| 214 | AddLine('Temp := ' + GetRegister(R1, Reader.DataSize) + ';');
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| 215 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R2, Reader.DataSize) + ';');
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| 216 | AddLine(GetRegister(R2, Reader.DataSize) + ' := Temp;');
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| 217 | end;
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| 218 |
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| 219 | procedure TCompilerPascal.InstPush;
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| 220 | var
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| 221 | R: Byte;
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| 222 | begin
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| 223 | R := Reader.Read8;
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| 224 | AddLine('Dec(SP, ' + IntToStr(BitWidthBytes[Reader.DataSize]) + ');');
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| 225 | AddLine(GetMemory('SP', Reader.AddrSize) + ' := ' + GetRegister(R, Reader.DataSize) + ';');
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| 226 | end;
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| 227 |
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| 228 | procedure TCompilerPascal.InstPop;
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| 229 | var
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| 230 | R: Byte;
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| 231 | begin
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| 232 | R := Reader.Read8;
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| 233 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + GetMemory('SP', Reader.AddrSize) + ';');
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| 234 | AddLine('Inc(SP, ' + IntToStr(BitWidthBytes[Reader.DataSize]) + ');');
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| 235 | end;
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| 236 |
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| 237 | procedure TCompilerPascal.InstCall;
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| 238 | var
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| 239 | Addr: QWord;
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| 240 | begin
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| 241 | Addr := Reader.ReadAddress;
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| 242 | AddLine('Dec(SP, ' + IntToStr(BitWidthBytes[Reader.AddrSize]) + ');');
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| 243 | AddLine(GetMemory('SP', Reader.AddrSize) + ' := LongWord(@L' + IntToStr(Reader.IP) + ');');
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| 244 | AddLine(GetJump('L' + IntToStr(Addr)));
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| 245 | end;
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| 246 |
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| 247 | procedure TCompilerPascal.InstRet;
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| 248 | begin
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| 249 | AddLine('TempAddr := Pointer(' + GetMemory('SP', Reader.AddrSize) + ');');
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| 250 | AddLine('Inc(SP, ' + IntToStr(BitWidthBytes[Reader.AddrSize]) + ');');
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| 251 | AddLine(GetJump('TempAddr'));
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| 252 | end;
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| 253 |
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| 254 | procedure TCompilerPascal.InstAdd;
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| 255 | var
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| 256 | R1, R2: Byte;
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| 257 | begin
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| 258 | R1 := Reader.Read8;
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| 259 | R2 := Reader.Read8;
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| 260 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 261 | ' + ' + GetRegister(R2, Reader.DataSize));
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| 262 | end;
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| 263 |
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| 264 | procedure TCompilerPascal.InstAddi;
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| 265 | var
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| 266 | R: Byte;
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| 267 | begin
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| 268 | R := Reader.Read8;
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| 269 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + GetRegister(R, Reader.DataSize) +
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| 270 | ' + ' + IntToStr(Reader.ReadData));
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| 271 | end;
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| 272 |
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| 273 | procedure TCompilerPascal.InstSub;
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| 274 | var
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| 275 | R1, R2: Byte;
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| 276 | begin
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| 277 | R1 := Reader.Read8;
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| 278 | R2 := Reader.Read8;
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| 279 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 280 | ' - ' + GetRegister(R2, Reader.DataSize));
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| 281 | end;
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| 282 |
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| 283 | procedure TCompilerPascal.InstSubi;
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| 284 | var
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| 285 | R: Byte;
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| 286 | begin
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| 287 | R := Reader.Read8;
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| 288 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + GetRegister(R, Reader.DataSize) +
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| 289 | ' - ' + IntToStr(Reader.ReadData));
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| 290 | end;
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| 291 |
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| 292 | procedure TCompilerPascal.InstMul;
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| 293 | var
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| 294 | R1, R2: Byte;
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| 295 | begin
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| 296 | R1 := Reader.Read8;
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| 297 | R2 := Reader.Read8;
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| 298 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 299 | ' * ' + GetRegister(R2, Reader.DataSize));
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| 300 | end;
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| 301 |
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| 302 | procedure TCompilerPascal.InstDiv;
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| 303 | var
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| 304 | R1, R2: Byte;
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| 305 | begin
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| 306 | R1 := Reader.Read8;
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| 307 | R2 := Reader.Read8;
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| 308 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 309 | ' div ' + GetRegister(R2, Reader.DataSize));
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| 310 | end;
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| 311 |
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| 312 | procedure TCompilerPascal.InstMod;
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| 313 | var
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| 314 | R1, R2: Byte;
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| 315 | begin
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| 316 | R1 := Reader.Read8;
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| 317 | R2 := Reader.Read8;
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| 318 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 319 | ' mod ' + GetRegister(R2, Reader.DataSize));
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| 320 | end;
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| 321 |
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| 322 | procedure TCompilerPascal.InstInc;
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| 323 | var
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| 324 | R: Byte;
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| 325 | begin
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| 326 | R := Reader.Read8;
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| 327 | AddLine('Inc(' + GetRegister(R, Reader.DataSize) + ');');
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| 328 | end;
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| 329 |
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| 330 | procedure TCompilerPascal.InstDec;
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| 331 | var
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| 332 | R: Byte;
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| 333 | begin
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| 334 | R := Reader.Read8;
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| 335 | AddLine('Dec(' + GetRegister(R, Reader.DataSize) + ');');
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| 336 | end;
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| 337 |
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| 338 | procedure TCompilerPascal.InstIn;
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| 339 | var
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| 340 | R: TRegIndex;
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| 341 | Port: TAddress;
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| 342 | begin
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| 343 | R := Reader.Read8;
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| 344 | Port := Reader.ReadAddress;
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| 345 | // TODO
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| 346 | end;
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| 347 |
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| 348 | procedure TCompilerPascal.InstOut;
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| 349 | var
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| 350 | R: TRegIndex;
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| 351 | Port: TAddress;
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| 352 | begin
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| 353 | Port := Reader.ReadAddress;
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| 354 | R := Reader.Read8;
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| 355 | // TODO
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| 356 | end;
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| 357 |
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| 358 | procedure TCompilerPascal.InstShr;
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| 359 | var
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| 360 | R: Byte;
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| 361 | begin
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| 362 | R := Reader.Read8;
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| 363 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + GetRegister(R, Reader.DataSize) +
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| 364 | ' shr ' + IntToStr(Reader.ReadData));
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| 365 | end;
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| 366 |
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| 367 | procedure TCompilerPascal.InstShl;
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| 368 | var
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| 369 | R: Byte;
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| 370 | begin
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| 371 | R := Reader.Read8;
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| 372 | AddLine(GetRegister(R, Reader.DataSize) + ' := ' + GetRegister(R, Reader.DataSize) +
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| 373 | ' shl ' + IntToStr(Reader.ReadData));
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| 374 | end;
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| 375 |
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| 376 | procedure TCompilerPascal.InstAnd;
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| 377 | var
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| 378 | R1, R2: Byte;
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| 379 | begin
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| 380 | R1 := Reader.Read8;
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| 381 | R2 := Reader.Read8;
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| 382 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 383 | ' and ' + GetRegister(R2, Reader.DataSize));
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| 384 | end;
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| 385 |
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| 386 | procedure TCompilerPascal.InstOr;
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| 387 | var
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| 388 | R1, R2: Byte;
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| 389 | begin
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| 390 | R1 := Reader.Read8;
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| 391 | R2 := Reader.Read8;
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| 392 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 393 | ' or ' + GetRegister(R2, Reader.DataSize));
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| 394 | end;
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| 395 |
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| 396 | procedure TCompilerPascal.InstXor;
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| 397 | var
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| 398 | R1, R2: Byte;
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| 399 | begin
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| 400 | R1 := Reader.Read8;
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| 401 | R2 := Reader.Read8;
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| 402 | AddLine(GetRegister(R1, Reader.DataSize) + ' := ' + GetRegister(R1, Reader.DataSize) +
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| 403 | ' xor ' + GetRegister(R2, Reader.DataSize));
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| 404 | end;
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| 405 |
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| 406 | procedure TCompilerPascal.InstLddr;
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| 407 | begin
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| 408 | // TODO
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| 409 | end;
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| 410 |
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| 411 | procedure TCompilerPascal.InstLdir;
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| 412 | begin
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| 413 | // TODO
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| 414 | end;
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| 415 |
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| 416 | procedure TCompilerPascal.InstDataPrefix8;
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| 417 | begin
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| 418 | Reader.Prefix := True;
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| 419 | Reader.DataSize := bw8;
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| 420 | end;
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| 421 |
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| 422 | procedure TCompilerPascal.InstDataPrefix16;
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| 423 | begin
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| 424 | Reader.Prefix := True;
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| 425 | Reader.DataSize := bw16;
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| 426 | end;
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| 427 |
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| 428 | procedure TCompilerPascal.InstDataPrefix32;
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| 429 | begin
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| 430 | Reader.Prefix := True;
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| 431 | Reader.DataSize := bw32;
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| 432 | end;
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| 433 |
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| 434 | procedure TCompilerPascal.InstDataPrefix64;
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| 435 | begin
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| 436 | Reader.Prefix := True;
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| 437 | Reader.DataSize := bw64;
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| 438 | end;
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| 439 |
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| 440 | procedure TCompilerPascal.InstDataSize;
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| 441 | var
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| 442 | BitWidth: Byte;
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| 443 | begin
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| 444 | BitWidth := Reader.Read8;
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| 445 | if (BitWidth <> 0) and (BitWidth <= Byte(High(TBitWidth))) then begin
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| 446 | Reader.DataSizeBase := TBitWidth(BitWidth);
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| 447 | Reader.DataSize := Reader.DataSizeBase;
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| 448 | end;
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| 449 | end;
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| 450 |
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| 451 | procedure TCompilerPascal.InstAddrPrefix8;
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| 452 | begin
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| 453 | Reader.Prefix := True;
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| 454 | Reader.AddrSize := bw8;
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| 455 | end;
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| 456 |
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| 457 | procedure TCompilerPascal.InstAddrPrefix16;
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| 458 | begin
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| 459 | Reader.Prefix := True;
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| 460 | Reader.AddrSize := bw16;
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| 461 | end;
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| 462 |
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| 463 | procedure TCompilerPascal.InstAddrPrefix32;
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| 464 | begin
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| 465 | Reader.Prefix := True;
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| 466 | Reader.AddrSize := bw32;
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| 467 | end;
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| 468 |
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| 469 | procedure TCompilerPascal.InstAddrPrefix64;
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| 470 | begin
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| 471 | Reader.Prefix := True;
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| 472 | Reader.AddrSize := bw64;
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| 473 | end;
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| 474 |
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| 475 | procedure TCompilerPascal.InstAddrSize;
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| 476 | var
|
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| 477 | BitWidth: Byte;
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| 478 | begin
|
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| 479 | BitWidth := Reader.Read8;
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|---|
| 480 | if (BitWidth <> 0) and (BitWidth <= Byte(High(TBitWidth))) then begin
|
|---|
| 481 | Reader.AddrSizeBase := TBitWidth(BitWidth);
|
|---|
| 482 | Reader.AddrSize := Reader.AddrSizeBase;
|
|---|
| 483 | end; // TODO error reporting
|
|---|
| 484 | end;
|
|---|
| 485 |
|
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| 486 | procedure TCompilerPascal.InitInstructions;
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| 487 | begin
|
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| 488 | Instructions[opNop] := InstNop;
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| 489 | Instructions[opHalt] := InstHalt;
|
|---|
| 490 | Instructions[opLoad] := InstLoad;
|
|---|
| 491 | Instructions[opLoadi] := InstLoadImmediate;
|
|---|
| 492 | Instructions[opJump] := InstJump;
|
|---|
| 493 | Instructions[opJumpNotZero] := InstJumpNotZero;
|
|---|
| 494 | Instructions[opJumpZero] := InstJumpZero;
|
|---|
| 495 | Instructions[opJumpRel] := InstJumpRel;
|
|---|
| 496 | Instructions[opJumpRelNotZero] := InstJumpRelNotZero;
|
|---|
| 497 | Instructions[opJumpRelZero] := InstJumpRelZero;
|
|---|
| 498 | Instructions[opLoadMem] := InstLoadMem;
|
|---|
| 499 | Instructions[opStoreMem] := InstStoreMem;
|
|---|
| 500 | Instructions[opClear] := InstClear;
|
|---|
| 501 | Instructions[opNeg] := InstNeg;
|
|---|
| 502 | Instructions[opExchg] := InstExchg;
|
|---|
| 503 | Instructions[opPop] := InstPop;
|
|---|
| 504 | Instructions[opPush] := InstPush;
|
|---|
| 505 | Instructions[opCall] := InstCall;
|
|---|
| 506 | Instructions[opRet] := InstRet;
|
|---|
| 507 | Instructions[opAdd] := InstAdd;
|
|---|
| 508 | Instructions[opAddi] := InstAddi;
|
|---|
| 509 | Instructions[opSub] := InstSub;
|
|---|
| 510 | Instructions[opSubi] := InstSubi;
|
|---|
| 511 | Instructions[opInc] := InstInc;
|
|---|
| 512 | Instructions[opDec] := InstDec;
|
|---|
| 513 | Instructions[opIn] := InstIn;
|
|---|
| 514 | Instructions[opOut] := InstOut;
|
|---|
| 515 | Instructions[opShr] := InstShr;
|
|---|
| 516 | Instructions[opShl] := InstShl;
|
|---|
| 517 | Instructions[opDataSize] := InstDataSize;
|
|---|
| 518 | Instructions[opDataPrefix8] := InstDataPrefix8;
|
|---|
| 519 | Instructions[opDataPrefix16] := InstDataPrefix16;
|
|---|
| 520 | Instructions[opDataPrefix32] := InstDataPrefix32;
|
|---|
| 521 | Instructions[opDataPrefix64] := InstDataPrefix64;
|
|---|
| 522 | Instructions[opAddrSize] := InstAddrSize;
|
|---|
| 523 | Instructions[opAddrPrefix8] := InstAddrPrefix8;
|
|---|
| 524 | Instructions[opAddrPrefix16] := InstAddrPrefix16;
|
|---|
| 525 | Instructions[opAddrPrefix32] := InstAddrPrefix32;
|
|---|
| 526 | Instructions[opAddrPrefix64] := InstAddrPrefix64;
|
|---|
| 527 | Instructions[opTest] := InstTest;
|
|---|
| 528 | Instructions[opAnd] := InstAnd;
|
|---|
| 529 | Instructions[opOr] := InstOr;
|
|---|
| 530 | Instructions[opXor] := InstXor;
|
|---|
| 531 | Instructions[opLdir] := InstLdir;
|
|---|
| 532 | Instructions[opLddr] := InstLddr;
|
|---|
| 533 | Instructions[opMul] := InstMul;
|
|---|
| 534 | Instructions[opDiv] := InstDiv;
|
|---|
| 535 | Instructions[opMod] := InstMod;
|
|---|
| 536 | Instructions[opConvert] := InstConvert;
|
|---|
| 537 | end;
|
|---|
| 538 |
|
|---|
| 539 | procedure TCompilerPascal.AddLine(Text: string);
|
|---|
| 540 | begin
|
|---|
| 541 | Output := Output + DupeString(' ', Indent) + Text + LineEnding;
|
|---|
| 542 | end;
|
|---|
| 543 |
|
|---|
| 544 | function TCompilerPascal.GetRegister(Index: Byte; BitWidth: TBitWidth): string;
|
|---|
| 545 | begin
|
|---|
| 546 | Result := 'R' + IntToStr(Index) + BitWidthSuffix[BitWidth];
|
|---|
| 547 | end;
|
|---|
| 548 |
|
|---|
| 549 | function TCompilerPascal.GetMemory(Offset: string; BitWidth: TBitWidth): string;
|
|---|
| 550 | begin
|
|---|
| 551 | Result := BitWidthPtrType[BitWidth] + '(Memory + ' + Offset + ')^';
|
|---|
| 552 | end;
|
|---|
| 553 |
|
|---|
| 554 | function TCompilerPascal.GetJump(LabelName: string): string;
|
|---|
| 555 | begin
|
|---|
| 556 | Result := 'asm jmp ' + LabelName + ' end;';
|
|---|
| 557 | end;
|
|---|
| 558 |
|
|---|
| 559 | procedure TCompilerPascal.Compile;
|
|---|
| 560 | var
|
|---|
| 561 | Opcode: Byte;
|
|---|
| 562 | MemorySize: QWord;
|
|---|
| 563 | OutputBody: string;
|
|---|
| 564 | LabelsText: string;
|
|---|
| 565 | LabelAddr: QWord;
|
|---|
| 566 | I: Integer;
|
|---|
| 567 | begin
|
|---|
| 568 | Reader.Init;
|
|---|
| 569 | MemorySize := MemSize(Reader.Cpu.Memory);
|
|---|
| 570 | AddLine('begin');
|
|---|
| 571 | AddLine(' SP := ' + IntToStr(MemorySize) + ';');
|
|---|
| 572 | AddLine(' Memory := GetMem(' + IntToStr(MemorySize) + ');');
|
|---|
| 573 | Inc(Indent);
|
|---|
| 574 | while Reader.IP < MemorySize do begin
|
|---|
| 575 | Reader.Prefix := False;
|
|---|
| 576 | LabelAddr := Reader.IP;
|
|---|
| 577 | Opcode := Reader.Read8;
|
|---|
| 578 | if Opcode <= Integer(High(TOpcode)) then begin
|
|---|
| 579 | AddLine('L' + IntToStr(LabelAddr) + ':');
|
|---|
| 580 | Labels.Add('L' + IntToStr(LabelAddr));
|
|---|
| 581 | if Opcode < Length(Instructions) then begin
|
|---|
| 582 | if Assigned(Instructions[TOpcode(Opcode)]) then Instructions[TOpcode(Opcode)]
|
|---|
| 583 | else raise Exception.Create('Missing instruction handler for opcode '+ IntToStr(Opcode));
|
|---|
| 584 | end else raise Exception.Create('Unsupported opcode ' + IntToStr(Opcode) + ' at address ' + IntToHex(Reader.IP - 1, 8) + '.');
|
|---|
| 585 | if not Reader.Prefix then begin
|
|---|
| 586 | Reader.DataSize := Reader.DataSizeBase;
|
|---|
| 587 | Reader.AddrSize := Reader.AddrSizeBase;
|
|---|
| 588 | end;
|
|---|
| 589 | end else begin
|
|---|
| 590 | end;
|
|---|
| 591 | end;
|
|---|
| 592 | Dec(Indent);
|
|---|
| 593 | AddLine('end.');
|
|---|
| 594 | OutputBody := Output;
|
|---|
| 595 |
|
|---|
| 596 | Output := '';
|
|---|
| 597 | AddLine('type');
|
|---|
| 598 | AddLine(' TBitWidth = (bwNone, bw8, bw16, bw32, bw64);');
|
|---|
| 599 | AddLine(' TRegister = record');
|
|---|
| 600 | AddLine(' case TBitWidth of');
|
|---|
| 601 | AddLine(' bw8: (B: Byte);');
|
|---|
| 602 | AddLine(' bw16: (W: Word);');
|
|---|
| 603 | AddLine(' bw32: (D: DWord);');
|
|---|
| 604 | AddLine(' bw64: (Q: QWord);');
|
|---|
| 605 | AddLine(' end;');
|
|---|
| 606 | AddLine('var');
|
|---|
| 607 | AddLine(' Memory: Pointer;');
|
|---|
| 608 | for I := 0 to High(Reader.Cpu.Registers) do
|
|---|
| 609 | AddLine(' R' + IntToStr(I) + ': TRegister;');
|
|---|
| 610 | AddLine(' SP: QWord;');
|
|---|
| 611 | AddLine(' Zero: Boolean;');
|
|---|
| 612 | AddLine(' Temp: QWord;');
|
|---|
| 613 | AddLine(' TempAddr: Pointer;');
|
|---|
| 614 | AddLine('');
|
|---|
| 615 | LabelsText := '';
|
|---|
| 616 | for I := 0 to Labels.Count - 1 do begin
|
|---|
| 617 | if I > 0 then LabelsText := LabelsText + ', ';
|
|---|
| 618 | LabelsText := LabelsText + Labels[I];
|
|---|
| 619 | end;
|
|---|
| 620 | AddLine('label ' + LabelsText + ';');
|
|---|
| 621 | Output := Output + OutputBody;
|
|---|
| 622 | end;
|
|---|
| 623 |
|
|---|
| 624 | constructor TCompilerPascal.Create;
|
|---|
| 625 | begin
|
|---|
| 626 | OpcodeDefs := TOpcodeDefs.Create;
|
|---|
| 627 | Reader := TInstructionReader.Create;
|
|---|
| 628 | Labels := TStringList.Create;
|
|---|
| 629 | InitInstructions;
|
|---|
| 630 | end;
|
|---|
| 631 |
|
|---|
| 632 | destructor TCompilerPascal.Destroy;
|
|---|
| 633 | begin
|
|---|
| 634 | FreeAndNil(Reader);
|
|---|
| 635 | FreeAndNil(OpcodeDefs);
|
|---|
| 636 | FreeAndNil(Labels);
|
|---|
| 637 | inherited Destroy;
|
|---|
| 638 | end;
|
|---|
| 639 |
|
|---|
| 640 | end.
|
|---|
| 641 |
|
|---|
