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https://github.com/jpd002/Play-.git
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142 lines
2.8 KiB
C
142 lines
2.8 KiB
C
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#ifndef _ARMASSEMBLER_H_
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#define _ARMASSEMBLER_H_
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#include <functional>
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#include "Types.h"
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class CArmAssembler
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{
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public:
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enum REGISTER
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{
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r0 = 0,
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r1 = 1,
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r2 = 2,
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r3 = 3,
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r4 = 4,
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r5 = 5,
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r6 = 6,
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r7 = 7,
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r8 = 8,
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r9 = 9,
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r10 = 10,
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r11 = 11,
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r12 = 12,
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r13 = 13,
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r14 = 14,
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r15 = 15,
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rIP = 12,
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rSP = 13,
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rLR = 14,
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rPC = 15,
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};
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enum ALU_OPCODE
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{
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ALU_OPCODE_AND = 0x00,
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ALU_OPCODE_EOR = 0x01,
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ALU_OPCODE_SUB = 0x02,
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ALU_OPCODE_RSB = 0x03,
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ALU_OPCODE_ADD = 0x04,
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ALU_OPCODE_ADC = 0x05,
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ALU_OPCODE_SBC = 0x06,
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ALU_OPCODE_RSC = 0x07,
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ALU_OPCODE_TST = 0x08,
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ALU_OPCODE_TEQ = 0x09,
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ALU_OPCODE_CMP = 0x0A,
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ALU_OPCODE_CMN = 0x0B,
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ALU_OPCODE_ORR = 0x0C,
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ALU_OPCODE_MOV = 0x0D,
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ALU_OPCODE_BIC = 0x0E,
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ALU_OPCODE_MVN = 0x0F,
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};
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typedef std::tr1::function<void (uint8)> WriteFunctionType;
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typedef std::tr1::function<void (unsigned int, uint8)> WriteAtFunctionType;
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typedef std::tr1::function<size_t ()> TellFunctionType;
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struct InstructionAlu
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{
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InstructionAlu()
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{
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memset(this, 0, sizeof(InstructionAlu));
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}
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unsigned int operand : 12;
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unsigned int rd : 4;
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unsigned int rn : 4;
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unsigned int setFlags : 1;
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unsigned int opcode : 4;
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unsigned int immediate : 1;
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unsigned int reserved : 2;
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unsigned int condition : 4;
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};
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struct ImmediateAluOperand
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{
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unsigned int immediate : 8;
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unsigned int rotate : 4;
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};
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struct ShiftRmAddress
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{
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union
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{
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struct
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{
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unsigned int rm : 4;
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unsigned int isConstant : 1;
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unsigned int shiftType : 2;
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unsigned int constant : 5;
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} immediateShift;
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struct
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{
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unsigned int rm : 4;
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unsigned int isConstant : 1;
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unsigned int shiftType : 2;
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unsigned int zero : 1;
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unsigned int rs : 4;
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} registerShift;
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};
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};
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struct LdrAddress
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{
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union
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{
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uint16 immediate;
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ShiftRmAddress shiftRm;
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};
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bool isImmediate;
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};
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CArmAssembler(
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const WriteFunctionType&,
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const WriteAtFunctionType&,
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const TellFunctionType&);
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virtual ~CArmAssembler();
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void Add(REGISTER, REGISTER, REGISTER);
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void Add(REGISTER, REGISTER, const ImmediateAluOperand&);
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void Blx(REGISTER);
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void Ldr(REGISTER, REGISTER, const LdrAddress&);
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void Mov(REGISTER, REGISTER);
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void Str(REGISTER, REGISTER, const LdrAddress&);
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void Sub(REGISTER, REGISTER, const ImmediateAluOperand&);
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static LdrAddress MakeImmediateLdrAddress(uint32);
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static ImmediateAluOperand MakeImmediateAluOperand(uint8, uint8);
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private:
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void WriteWord(uint32);
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WriteFunctionType m_WriteFunction;
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WriteAtFunctionType m_WriteAtFunction;
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TellFunctionType m_TellFunction;
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};
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#endif
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