| 1 | unit UInstructionWriter;
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| 2 |
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| 3 | {$mode delphi}{$H+}
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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, UCpu;
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| 9 |
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| 10 | type
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| 11 |
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| 12 | { TInstructionWriter }
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| 13 |
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| 14 | TInstructionWriter = class
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| 15 | private
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| 16 | procedure PrefixBegin;
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| 17 | procedure PrefixEnd;
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| 18 | public
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| 19 | Cpu: TCpu;
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| 20 | IP: Integer;
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| 21 | DataSize: TBitWidth;
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| 22 | DataSizeBase: TBitWidth;
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| 23 | AddrSize: TBitWidth;
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| 24 | AddrSizeBase: TBitWidth;
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| 25 | Prefix: Boolean;
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| 26 | procedure Init;
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| 27 | function GetRelativeAddr(BitWidth: TBitWidth; BaseIP, TargetAddr: QWord): Int64;
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| 28 | procedure Write8(Value: Byte);
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| 29 | procedure Write16(Value: Word);
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| 30 | procedure Write32(Value: DWord);
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| 31 | procedure Write64(Value: QWord);
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| 32 | procedure WriteAddress(Value: TAddress);
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| 33 | procedure WriteAddressSigned(Value: TAddressSigned); inline;
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| 34 | procedure WriteData(Value: QWord);
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| 35 | procedure WriteString(Text: string);
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| 36 | procedure Nop;
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| 37 | procedure Halt;
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| 38 | procedure Loadi(Reg: TRegIndex; Value: QWord);
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| 39 | procedure Increment(Reg: TRegIndex);
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| 40 | procedure Decrement(Reg: TRegIndex);
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| 41 | procedure Jump(Addr: QWord);
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| 42 | procedure JumpNotZero(Addr: QWord);
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| 43 | procedure JumpZero(Addr: QWord);
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| 44 | procedure JumpRel(Addr: QWord);
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| 45 | procedure JumpRelNotZero(Addr: QWord);
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| 46 | procedure JumpRelZero(Addr: QWord);
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| 47 | procedure Push(Reg: TRegIndex);
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| 48 | procedure Pop(Reg: TRegIndex);
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| 49 | procedure Call(Addr: QWord);
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| 50 | procedure Return;
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| 51 | procedure Convert(Reg: TRegIndex);
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| 52 | procedure DataPrefix8;
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| 53 | procedure DataPrefix16;
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| 54 | procedure DataPrefix32;
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| 55 | procedure DataPrefix64;
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| 56 | procedure AddrPrefix8;
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| 57 | procedure AddrPrefix16;
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| 58 | procedure AddrPrefix32;
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| 59 | procedure AddrPrefix64;
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| 60 | procedure StoreMem(RegAddr, RegSrc: TRegIndex);
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| 61 | procedure LoadMem(RegDst, RegAddr: TRegIndex);
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| 62 | procedure Output(Port: TAddress; Reg: TRegIndex);
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| 63 | procedure Input(Reg: TRegIndex; Port: TAddress);
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| 64 | procedure Test(Reg: TRegIndex);
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| 65 | end;
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| 66 |
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| 67 |
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| 68 | implementation
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| 69 |
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| 70 | { TInstructionWriter }
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| 71 |
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| 72 | procedure TInstructionWriter.Nop;
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| 73 | begin
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| 74 | PrefixBegin;
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| 75 | Write8(Byte(opNop));
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| 76 | PrefixEnd;
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| 77 | end;
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| 78 |
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| 79 | procedure TInstructionWriter.Halt;
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| 80 | begin
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| 81 | PrefixBegin;
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| 82 | Write8(Byte(opHalt));
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| 83 | PrefixEnd;
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| 84 | end;
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| 85 |
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| 86 | procedure TInstructionWriter.Loadi(Reg: TRegIndex; Value: QWord);
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| 87 | begin
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| 88 | PrefixBegin;
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| 89 | Write8(Byte(opLoadi));
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| 90 | Write8(Reg);
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| 91 | WriteData(Value);
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| 92 | PrefixEnd;
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| 93 | end;
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| 94 |
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| 95 | procedure TInstructionWriter.Increment(Reg: TRegIndex);
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| 96 | begin
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| 97 | PrefixBegin;
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| 98 | Write8(Byte(opInc));
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| 99 | Write8(Reg);
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| 100 | PrefixEnd;
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| 101 | end;
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| 102 |
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| 103 | procedure TInstructionWriter.Decrement(Reg: TRegIndex);
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| 104 | begin
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| 105 | PrefixBegin;
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| 106 | Write8(Byte(opDec));
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| 107 | Write8(Reg);
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| 108 | PrefixEnd;
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| 109 | end;
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| 110 |
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| 111 | procedure TInstructionWriter.Jump(Addr: QWord);
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| 112 | begin
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| 113 | PrefixBegin;
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| 114 | Write8(Byte(opJump));
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| 115 | WriteAddress(Addr);
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| 116 | PrefixEnd;
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| 117 | end;
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| 118 |
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| 119 | procedure TInstructionWriter.JumpNotZero(Addr: QWord);
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| 120 | begin
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| 121 | PrefixBegin;
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| 122 | Write8(Byte(opJumpNotZero));
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| 123 | WriteAddress(Addr);
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| 124 | PrefixEnd;
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| 125 | end;
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| 126 |
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| 127 | procedure TInstructionWriter.JumpZero(Addr: QWord);
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| 128 | begin
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| 129 | PrefixBegin;
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| 130 | Write8(Byte(opJumpZero));
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| 131 | WriteAddress(Addr);
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| 132 | PrefixEnd;
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| 133 | end;
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| 134 |
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| 135 | function TInstructionWriter.GetRelativeAddr(BitWidth: TBitWidth; BaseIP, TargetAddr: QWord): Int64;
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| 136 | begin
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| 137 | Result := Int64(TargetAddr) - (BaseIP + 1 + BitWidthBytes[BitWidth]);
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| 138 | end;
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| 139 |
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| 140 | procedure TInstructionWriter.JumpRel(Addr: QWord);
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| 141 | var
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| 142 | RelAddr: Int64;
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| 143 | begin
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| 144 | PrefixBegin;
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| 145 | RelAddr := GetRelativeAddr(AddrSize, IP, Addr);
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| 146 | Write8(Byte(opJumpRel));
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| 147 | WriteAddressSigned(RelAddr);
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| 148 | PrefixEnd;
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| 149 | end;
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| 150 |
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| 151 | procedure TInstructionWriter.JumpRelNotZero(Addr: QWord);
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| 152 | var
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| 153 | RelAddr: Int64;
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| 154 | begin
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| 155 | PrefixBegin;
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| 156 | RelAddr := GetRelativeAddr(AddrSize, IP, Addr);
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| 157 | Write8(Byte(opJumpRelNotZero));
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| 158 | WriteAddressSigned(RelAddr);
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| 159 | PrefixEnd;
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| 160 | end;
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| 161 |
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| 162 | procedure TInstructionWriter.JumpRelZero(Addr: QWord);
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| 163 | var
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| 164 | RelAddr: Int64;
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| 165 | begin
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| 166 | PrefixBegin;
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| 167 | RelAddr := GetRelativeAddr(AddrSize, IP, Addr);
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| 168 | Write8(Byte(opJumpRelZero));
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| 169 | WriteAddressSigned(RelAddr);
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| 170 | PrefixEnd;
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| 171 | end;
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| 172 |
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| 173 | procedure TInstructionWriter.Push(Reg: TRegIndex);
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| 174 | begin
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| 175 | PrefixBegin;
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| 176 | Write8(Byte(opPush));
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| 177 | Write8(Reg);
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| 178 | PrefixEnd;
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| 179 | end;
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| 180 |
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| 181 | procedure TInstructionWriter.Pop(Reg: TRegIndex);
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| 182 | begin
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| 183 | PrefixBegin;
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| 184 | Write8(Byte(opPop));
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| 185 | Write8(Reg);
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| 186 | PrefixEnd;
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| 187 | end;
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| 188 |
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| 189 | procedure TInstructionWriter.Call(Addr: QWord);
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| 190 | begin
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| 191 | PrefixBegin;
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| 192 | Write8(Byte(opCall));
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| 193 | WriteAddress(Addr);
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| 194 | PrefixEnd;
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| 195 | end;
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| 196 |
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| 197 | procedure TInstructionWriter.Return;
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| 198 | begin
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| 199 | PrefixBegin;
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| 200 | Write8(Byte(opRet));
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| 201 | PrefixEnd;
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| 202 | end;
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| 203 |
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| 204 | procedure TInstructionWriter.Convert(Reg: TRegIndex);
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| 205 | begin
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| 206 | PrefixBegin;
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| 207 | Write8(Byte(opConvert));
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| 208 | Write8(Reg);
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| 209 | PrefixEnd;
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| 210 | end;
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| 211 |
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| 212 | procedure TInstructionWriter.DataPrefix8;
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| 213 | begin
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| 214 | Prefix := True;
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| 215 | DataSize := bw8;
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| 216 | Write8(Byte(opDataPrefix8));
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| 217 | end;
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| 218 |
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| 219 | procedure TInstructionWriter.DataPrefix16;
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| 220 | begin
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| 221 | Prefix := True;
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| 222 | DataSize := bw16;
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| 223 | Write8(Byte(opDataPrefix16));
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| 224 | end;
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| 225 |
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| 226 | procedure TInstructionWriter.DataPrefix32;
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| 227 | begin
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| 228 | Prefix := True;
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| 229 | DataSize := bw32;
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| 230 | Write8(Byte(opDataPrefix32));
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| 231 | end;
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| 232 |
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| 233 | procedure TInstructionWriter.DataPrefix64;
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| 234 | begin
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| 235 | Prefix := True;
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| 236 | DataSize := bw64;
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| 237 | Write8(Byte(opDataPrefix64));
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| 238 | end;
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| 239 |
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| 240 | procedure TInstructionWriter.AddrPrefix8;
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| 241 | begin
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| 242 | Prefix := True;
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| 243 | AddrSize := bw8;
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| 244 | Write8(Byte(opAddrPrefix8));
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| 245 | end;
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| 246 |
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| 247 | procedure TInstructionWriter.AddrPrefix16;
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| 248 | begin
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| 249 | Prefix := True;
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| 250 | AddrSize := bw16;
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| 251 | Write8(Byte(opAddrPrefix16));
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| 252 | end;
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| 253 |
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| 254 | procedure TInstructionWriter.AddrPrefix32;
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| 255 | begin
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| 256 | Prefix := True;
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| 257 | AddrSize := bw32;
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| 258 | Write8(Byte(opAddrPrefix32));
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| 259 | end;
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| 260 |
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| 261 | procedure TInstructionWriter.AddrPrefix64;
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| 262 | begin
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| 263 | Prefix := True;
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| 264 | AddrSize := bw64;
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| 265 | Write8(Byte(opAddrPrefix64));
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| 266 | end;
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| 267 |
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| 268 | procedure TInstructionWriter.StoreMem(RegAddr, RegSrc: TRegIndex);
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| 269 | begin
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| 270 | Write8(Byte(opStoreMem));
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| 271 | Write8(RegAddr);
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| 272 | Write8(RegSrc);
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| 273 | end;
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| 274 |
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| 275 | procedure TInstructionWriter.LoadMem(RegDst, RegAddr: TRegIndex);
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| 276 | begin
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| 277 | PrefixBegin;
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| 278 | Write8(Byte(opLoadMem));
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| 279 | Write8(RegDst);
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| 280 | Write8(RegAddr);
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| 281 | PrefixEnd;
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| 282 | end;
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| 283 |
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| 284 | procedure TInstructionWriter.Output(Port: TAddress; Reg: TRegIndex);
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| 285 | begin
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| 286 | PrefixBegin;
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| 287 | Write8(Byte(opOut));
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| 288 | WriteAddress(Port);
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| 289 | Write8(Reg);
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| 290 | PrefixEnd;
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| 291 | end;
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| 292 |
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| 293 | procedure TInstructionWriter.Input(Reg: TRegIndex; Port: TAddress);
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| 294 | begin
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| 295 | PrefixBegin;
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| 296 | Write8(Byte(opIn));
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| 297 | Write8(Reg);
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| 298 | WriteAddress(Port);
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| 299 | PrefixEnd;
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| 300 | end;
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| 301 |
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| 302 | procedure TInstructionWriter.Test(Reg: TRegIndex);
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| 303 | begin
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| 304 | PrefixBegin;
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| 305 | Write8(Byte(opTest));
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| 306 | Write8(Reg);
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| 307 | Prefixend;
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| 308 | end;
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| 309 |
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| 310 | procedure TInstructionWriter.WriteString(Text: string);
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| 311 | var
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| 312 | I: Integer;
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| 313 | begin
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| 314 | for I := 1 to Length(Text) do
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| 315 | Write8(Ord(Text[I]));
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| 316 | end;
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| 317 |
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| 318 | procedure TInstructionWriter.PrefixBegin;
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| 319 | begin
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| 320 | Prefix := False;
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| 321 | end;
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| 322 |
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| 323 | procedure TInstructionWriter.PrefixEnd;
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| 324 | begin
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| 325 | if not Prefix then begin
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| 326 | DataSize := DataSizeBase;
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| 327 | AddrSize := AddrSizeBase;
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| 328 | end;
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| 329 | end;
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| 330 |
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| 331 | procedure TInstructionWriter.Init;
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| 332 | begin
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| 333 | DataSizeBase := Cpu.DataSizeBase;
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| 334 | DataSize := DataSizeBase;
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| 335 | AddrSizeBase := Cpu.AddrSizeBase;
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| 336 | AddrSize := AddrSizeBase;
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| 337 | IP := 0;
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| 338 | Prefix := False;
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| 339 | end;
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| 340 |
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| 341 | procedure TInstructionWriter.Write8(Value: Byte);
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| 342 | begin
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| 343 | PByte(Cpu.Memory + IP)^ := Value;
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| 344 | Inc(IP, SizeOf(Byte));
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| 345 | end;
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| 346 |
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| 347 | procedure TInstructionWriter.Write16(Value: Word);
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| 348 | begin
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| 349 | PWord(Cpu.Memory + IP)^ := Value;
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| 350 | Inc(IP, SizeOf(Word));
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| 351 | end;
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| 352 |
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| 353 | procedure TInstructionWriter.Write32(Value: DWord);
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| 354 | begin
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| 355 | PDWord(Cpu.Memory + IP)^ := Value;
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| 356 | Inc(IP, SizeOf(DWord));
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| 357 | end;
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| 358 |
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| 359 | procedure TInstructionWriter.Write64(Value: QWord);
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| 360 | begin
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| 361 | PQWord(Cpu.Memory + IP)^ := Value;
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| 362 | Inc(IP, SizeOf(QWord));
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| 363 | end;
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| 364 |
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| 365 | procedure TInstructionWriter.WriteAddress(Value: TAddress);
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| 366 | begin
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| 367 | case AddrSize of
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| 368 | bw8: Write8(Value and $ff);
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| 369 | bw16: Write16(Value and $ffff);
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| 370 | bw32: Write32(Value and $ffffffff);
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| 371 | bw64: Write64(Value);
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| 372 | end;
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| 373 | end;
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| 374 |
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| 375 | procedure TInstructionWriter.WriteAddressSigned(Value: TAddressSigned);
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| 376 | begin
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| 377 | case AddrSize of
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| 378 | bw8: Write8(Byte(Value and $ff));
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| 379 | bw16: Write16(Word(Value and $ffff));
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| 380 | bw32: Write32(DWord(Value and $ffffffff));
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| 381 | bw64: Write64(QWord(Value));
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| 382 | end;
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| 383 | end;
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| 384 |
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| 385 | procedure TInstructionWriter.WriteData(Value: QWord);
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| 386 | begin
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| 387 | case DataSize of
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| 388 | bw8: Write8(Value and $ff);
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| 389 | bw16: Write16(Value and $ffff);
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| 390 | bw32: Write32(Value and $ffffffff);
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| 391 | bw64: Write64(Value);
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| 392 | end;
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| 393 | end;
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| 394 |
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| 395 | end.
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| 396 |
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