mirror of https://github.com/bsnes-emu/bsnes.git
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
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#ifndef _RAR_VM_
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#define _RAR_VM_
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#define VM_STANDARDFILTERS
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#ifndef SFX_MODULE
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#define VM_OPTIMIZE
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#endif
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#define VM_MEMSIZE 0x40000
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#define VM_MEMMASK (VM_MEMSIZE-1)
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#define VM_GLOBALMEMADDR 0x3C000
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#define VM_GLOBALMEMSIZE 0x2000
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#define VM_FIXEDGLOBALSIZE 64
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enum VM_Commands
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{
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VM_MOV, VM_CMP, VM_ADD, VM_SUB, VM_JZ, VM_JNZ, VM_INC, VM_DEC,
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VM_JMP, VM_XOR, VM_AND, VM_OR, VM_TEST, VM_JS, VM_JNS, VM_JB,
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VM_JBE, VM_JA, VM_JAE, VM_PUSH, VM_POP, VM_CALL, VM_RET, VM_NOT,
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VM_SHL, VM_SHR, VM_SAR, VM_NEG, VM_PUSHA,VM_POPA, VM_PUSHF,VM_POPF,
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VM_MOVZX,VM_MOVSX,VM_XCHG, VM_MUL, VM_DIV, VM_ADC, VM_SBB, VM_PRINT,
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#ifdef VM_OPTIMIZE
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VM_MOVB, VM_MOVD, VM_CMPB, VM_CMPD,
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VM_ADDB, VM_ADDD, VM_SUBB, VM_SUBD, VM_INCB, VM_INCD, VM_DECB, VM_DECD,
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VM_NEGB, VM_NEGD,
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#endif
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VM_STANDARD
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};
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enum VM_StandardFilters {
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VMSF_NONE, VMSF_E8, VMSF_E8E9, VMSF_ITANIUM, VMSF_RGB, VMSF_AUDIO,
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VMSF_DELTA, VMSF_UPCASE
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};
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enum VM_Flags {VM_FC=1,VM_FZ=2,VM_FS=0x80000000};
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enum VM_OpType {VM_OPREG,VM_OPINT,VM_OPREGMEM,VM_OPNONE};
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struct VM_PreparedOperand
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{
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VM_OpType Type;
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uint Data;
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uint Base;
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uint *Addr;
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};
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struct VM_PreparedCommand
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{
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VM_Commands OpCode;
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bool ByteMode;
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VM_PreparedOperand Op1,Op2;
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};
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struct VM_PreparedProgram
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{
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VM_PreparedProgram( Rar_Error_Handler* eh ) : Cmd( eh ), GlobalData( eh ), StaticData( eh )
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{AltCmd=NULL;}
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Array<VM_PreparedCommand> Cmd;
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VM_PreparedCommand *AltCmd;
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int CmdCount;
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Array<byte> GlobalData;
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Array<byte> StaticData; // static data contained in DB operators
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uint InitR[7];
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byte *FilteredData;
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unsigned int FilteredDataSize;
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};
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class RarVM:private BitInput
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{
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private:
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inline uint GetValue(bool ByteMode,uint *Addr);
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inline void SetValue(bool ByteMode,uint *Addr,uint Value);
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inline uint* GetOperand(VM_PreparedOperand *CmdOp);
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void DecodeArg(VM_PreparedOperand &Op,bool ByteMode);
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#ifdef VM_OPTIMIZE
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void Optimize(VM_PreparedProgram *Prg);
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#endif
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bool ExecuteCode(VM_PreparedCommand *PreparedCode,int CodeSize);
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#ifdef VM_STANDARDFILTERS
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VM_StandardFilters IsStandardFilter(byte *Code,int CodeSize);
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void ExecuteStandardFilter(VM_StandardFilters FilterType);
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unsigned int FilterItanium_GetBits(byte *Data,int BitPos,int BitCount);
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void FilterItanium_SetBits(byte *Data,unsigned int BitField,int BitPos,
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int BitCount);
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#endif
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byte *Mem;
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uint R[8];
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uint Flags;
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public:
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RarVM();
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~RarVM();
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void Init();
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void handle_mem_error( Rar_Error_Handler& );
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friend class Unpack;
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void Prepare(byte *Code,int CodeSize,VM_PreparedProgram *Prg);
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void Execute(VM_PreparedProgram *Prg);
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void SetLowEndianValue(uint *Addr,uint Value);
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void SetMemory(unsigned int Pos,byte *Data,unsigned int DataSize);
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static uint ReadData(BitInput &Inp);
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};
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#endif
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