//	instruction-init.h
//	Initializes every instruction function prior to addressing.h so that function addresses are accessible
//	also defines the array used to refer to functions

//InstructionTable
void* IT;



void setIT(int i, uintptr_t p, Addressing r){
	uintptr_t* p1 = (IT + (i * sizeof(uintptr_t)));
	*p1 = p;

	Addressing* r1 = (IT + ((sizeof(uintptr_t)*256)) + (i * sizeof(Addressing)));
	*r1 = r;
}

uintptr_t getITFunction(int i){
	Addressing* r = (IT + (sizeof(uintptr_t)*i));
	return *r;
}

Addressing getITAddressing(int i){
	Addressing* r = (IT + (sizeof(uintptr_t)*256) + (sizeof(Addressing)*i));
	return *r;
}


void callIT(int i, address val){
	void (*func)(Addressing, address);
	func = (IT + (sizeof(uintptr_t) * i));
	Addressing r = (IT + ((i * sizeof(Addressing)) + (sizeof(uintptr_t)*256)));
	func(r, val);
}




// Load and Store Instructions
void fLDA(Addressing, address);
void fLDX(Addressing, address);
void fLDY(Addressing, address);
void fSTA(Addressing, address);
void fSTX(Addressing, address);
void fSTY(Addressing, address);
// Arithmetic Instructions
void fADC(Addressing, address);
void fSBC(Addressing, address);
//Increment and Decrement Instructions
void fINC(Addressing, address);
void fINX(Addressing, address);
void fINY(Addressing, address);
void fDEC(Addressing, address);
void fDEX(Addressing, address);
void fDEY(Addressing, address);
// Logical Instructions
void fAND(Addressing, address);
void fORA(Addressing, address);
void fEOR(Addressing, address);
// Jump, Branch, Compare, and Test Bits
void fJMP(Addressing, address);
void fBCC(Addressing, address);
void fBCS(Addressing, address);
void fBEQ(Addressing, address);
void fBNE(Addressing, address);
void fBMI(Addressing, address);
void fBPL(Addressing, address);
void fBVS(Addressing, address);
void fBVC(Addressing, address);
void fCMP(Addressing, address);
void fCPX(Addressing, address);
void fCPY(Addressing, address);
void fBIT(Addressing, address);
// Shift and Rotate Instructions
void fASL(Addressing, address);
void fLSR(Addressing, address);
void fROL(Addressing, address);
void fROR(Addressing, address);
// Transfer Instructions
void fTAX(Addressing, address);
void fTAY(Addressing, address);
void fTXA(Addressing, address);
void fTYA(Addressing, address);
// Stack Instructions
void fTSX(Addressing, address);
void fTXS(Addressing, address);
void fPHA(Addressing, address);
void fPHP(Addressing, address);
void fPLA(Addressing, address);
void fPLP(Addressing, address);
// Subroutine Instructions
void fJSR(Addressing, address);
void fRTS(Addressing, address);
void fRTI(Addressing, address);
// Set/Reset Insutrctions
void fCLC(Addressing, address);
void fCLD(Addressing, address);
void fCLI(Addressing, address);
void fCLV(Addressing, address);
void fSEC(Addressing, address);
void fSED(Addressing, address);
void fSEI(Addressing, address);
// NOP/BRK Instructions
void fNOP(Addressing, address);
void fBRK(Addressing, address);

void initIT(){
	IT = malloc(256 * (sizeof(uintptr_t) + sizeof(Addressing)));

	// Load and Store Instructions
	// fLDA(Addressing, address);
	setIT(0xA9, &fLDA, eImmediate);
	setIT(0xA5, &fLDA, eZeroPage);
	setIT(0xB5, &fLDA, eZeroPageIndexedX);
	setIT(0xAD, &fLDA, eAbsolute);
	setIT(0xBD, &fLDA, eAbsoluteIndexedX);
	setIT(0xB9, &fLDA, eAbsoluteIndexedY);
	setIT(0xA1, &fLDA, eIndexedIndirect);
	setIT(0xB1, &fLDA, eIndirectIndexed);
	// fLDX(Addressing, address);
	setIT(0xA2, &fLDX, eImmediate);
	setIT(0xA6, &fLDX, eZeroPage);
	setIT(0xB6, &fLDX, eZeroPageIndexedY);
	setIT(0xAE, &fLDX, eAbsolute);
	setIT(0xBE, &fLDX, eAbsoluteIndexedY);
	// fLDY(Addressing, address);
	setIT(0xA0, &fLDY, eImmediate);
	setIT(0xA4, &fLDY, eZeroPage);
	setIT(0xB4, &fLDY, eZeroPageIndexedX);
	setIT(0xAC, &fLDY, eAbsolute);
	setIT(0xBC, &fLDY, eAbsoluteIndexedX);
	// fSTA(Addressing, address);
	setIT(0x85, &fSTA, eZeroPage);
	setIT(0x95, &fSTA, eZeroPageIndexedX);
	setIT(0x8D, &fSTA, eAbsolute);
	setIT(0x9D, &fSTA, eAbsoluteIndexedX);
	setIT(0x99, &fSTA, eAbsoluteIndexedY);
	setIT(0x81, &fSTA, eIndexedIndirect);
	setIT(0x91, &fSTA, eIndirectIndexed);
	// fSTX(Addressing, address);
	setIT(0x86, &fSTX, eZeroPage);
	setIT(0x96, &fSTX, eZeroPageIndexedX);
	setIT(0x8E, &fSTX, eAbsolute);
	// fSTY(Addressing, address);
	setIT(0x84, &fSTY, eZeroPage);
	setIT(0x94, &fSTY, eZeroPageIndexedY);
	setIT(0x8C, &fSTY, eAbsolute);

	// Arithmetic Instructions
	// fADC(Addressing, address);
	setIT(0x69, &fADC, eImmediate);
	setIT(0x65, &fADC, eZeroPage);
	setIT(0x75, &fADC, eZeroPageIndexedX);
	setIT(0x6D, &fADC, eAbsolute);
	setIT(0x7D, &fADC, eAbsoluteIndexedX);
	setIT(0x79, &fADC, eAbsoluteIndexedY);
	setIT(0x61, &fADC, eIndexedIndirect);
	setIT(0x71, &fADC, eIndirectIndexed);
	// fSBC(Addressing, address);
	setIT(0xE9, &fSBC, eImmediate);
	setIT(0xE5, &fSBC, eZeroPage);
	setIT(0xF5, &fSBC, eZeroPageIndexedX);
	setIT(0xED, &fSBC, eAbsolute);
	setIT(0xFD, &fSBC, eAbsoluteIndexedX);
	setIT(0xF9, &fSBC, eAbsoluteIndexedY);
	setIT(0xE1, &fSBC, eIndexedIndirect);
	setIT(0xF1, &fSBC, eIndirectIndexed);

	//Increment and Decrement Instructions
	//INC(Addressing, address);
	setIT(0xE6, &fINC, eZeroPage);
	setIT(0xF6, &fINC, eZeroPageIndexedX);
	setIT(0xEE, &fINC, eAbsolute);
	setIT(0xFE, &fINC, eAbsoluteIndexedX);
	//INX(Addressing, address);
	setIT(0xE8, &fINX, eImplied);
	//INY(Addressing, address);
	setIT(0xC8, &fINY, eImplied);
	//DEC(Addressing, address);
	setIT(0xC6, &fDEC, eZeroPage);
	setIT(0xD6, &fDEC, eZeroPageIndexedX);
	setIT(0xCE, &fDEC, eAbsolute);
	setIT(0xDE, &fDEC, eAbsoluteIndexedX);
	//DEX(Addressing, address);
	setIT(0xCA, &fDEX, eImplied);
	//DEY(Addressing, address);
	setIT(0x88, &fDEY, eImplied);

	// Logical Instructions
	//AND(Addressing, address);
	setIT(0x29, &fAND, eImmediate);
	setIT(0x25, &fAND, eZeroPage);
	setIT(0x35, &fAND, eZeroPageIndexedX);
	setIT(0x2D, &fAND, eAbsolute);
	setIT(0x3D, &fAND, eAbsoluteIndexedX);
	setIT(0x39, &fAND, eAbsoluteIndexedY);
	setIT(0x21, &fAND, eIndexedIndirect);
	setIT(0x31, &fAND, eIndirectIndexed);
	//ORA(Addressing, address);
	setIT(0x09, &fORA, eImmediate);
	setIT(0x05, &fORA, eZeroPage);
	setIT(0x15, &fORA, eZeroPageIndexedX);
	setIT(0x0D, &fORA, eAbsolute);
	setIT(0x1D, &fORA, eAbsoluteIndexedX);
	setIT(0x19, &fORA, eAbsoluteIndexedY);
	setIT(0x01, &fORA, eIndexedIndirect);
	setIT(0x11, &fORA, eIndirectIndexed);
	//EOR(Addressing, address);
	setIT(0x49, &fEOR, eImmediate);
	setIT(0x45, &fEOR, eZeroPage);
	setIT(0x55, &fEOR, eZeroPageIndexedX);
	setIT(0x4D, &fEOR, eAbsolute);
	setIT(0x5D, &fEOR, eAbsoluteIndexedX);
	setIT(0x59, &fEOR, eAbsoluteIndexedY);
	setIT(0x41, &fEOR, eIndexedIndirect);
	setIT(0x51, &fEOR, eIndirectIndexed);

	// Jump, Branch, Compare, and Test Bits
	//JMP(Addressing, address);
	setIT(0x4C, &fJMP, eAbsolute);
	setIT(0x6C, &fJMP, eIndirectAbsolute);
	//BCC(Addressing, address);
	setIT(0x90, &fBCC, eRelative);
	//BCS(Addressing, address);
	setIT(0xB0, &fBCS, eRelative);
	//BEQ(Addressing, address);
	setIT(0xF0, &fBEQ, eRelative);
	//BNE(Addressing, address);
	setIT(0xD0, &fBNE, eRelative);
	//BMI(Addressing, address);
	setIT(0x30, &fBMI, eRelative);
	//BPL(Addressing, address);
	setIT(0x10, &fBPL, eRelative);
	//BVS(Addressing, address);
	setIT(0x70, &fBVS, eRelative);
	//BVC(Addressing, address);
	setIT(0x50, &fBVC, eRelative);
	//CMP(Addressing, address);
	setIT(0xC9, &fCMP, eImmediate);
	setIT(0xC5, &fCMP, eZeroPage);
	setIT(0xD5, &fCMP, eZeroPageIndexedX);
	setIT(0xCD, &fCMP, eAbsolute);
	setIT(0xDD, &fCMP, eAbsoluteIndexedX);
	setIT(0xD9, &fCMP, eAbsoluteIndexedY);
	setIT(0xC1, &fCMP, eIndexedIndirect);
	setIT(0xD1, &fCMP, eIndirectIndexed);
	//CPX(Addressing, address);
	setIT(0xE0, &fCPX, eImmediate);
	setIT(0xE4, &fCPX, eZeroPage);
	setIT(0xEC, &fCPX, eAbsolute);
	//CPY(Addressing, address);
	setIT(0xC0, &fCPY, eImmediate);
	setIT(0xC4, &fCPY, eZeroPage);
	setIT(0xCC, &fCPY, eAbsolute);
	//BIT(Addressing, address);
	setIT(0x4C, &fBIT, eZeroPage);
	setIT(0x6C, &fBIT, eAbsolute);

	// Shift and Rotate Instructions
	//ASL(Addressing, address);
	setIT(0x0A, &fASL, eAccumulator);
	setIT(0x06, &fASL, eZeroPage);
	setIT(0x16, &fASL, eZeroPageIndexedX);
	setIT(0x0E, &fASL, eAbsolute);
	setIT(0x1E, &fASL, eAbsoluteIndexedX);
	//LSR(Addressing, address);
	setIT(0x4A, &fLSR, eAccumulator);
	setIT(0x46, &fLSR, eZeroPage);
	setIT(0x56, &fLSR, eZeroPageIndexedX);
	setIT(0x4E, &fLSR, eAbsolute);
	setIT(0x5E, &fLSR, eAbsoluteIndexedX);
	//ROL(Addressing, address);
	setIT(0x2A, &fROL, eAccumulator);
	setIT(0x26, &fROL, eZeroPage);
	setIT(0x36, &fROL, eZeroPageIndexedX);
	setIT(0x2E, &fROL, eAbsolute);
	setIT(0x3E, &fROL, eAbsoluteIndexedX);
	//ROR(Addressing, address);
	setIT(0x6A, &fROR, eAccumulator);
	setIT(0x66, &fROR, eZeroPage);
	setIT(0x76, &fROR, eZeroPageIndexedX);
	setIT(0x6E, &fROR, eAbsolute);
	setIT(0x7E, &fROR, eAbsoluteIndexedX);

	// Transfer Instructions
	//TAX(Addressing, address);
	setIT(0xAA, &fTAX, eImplied);
	//TAY(Addressing, address);
	setIT(0xA8, &fTAY, eImplied);
	//TXA(Addressing, address);
	setIT(0x8A, &fTXA, eImplied);
	//TYA(Addressing, address);
	setIT(0x98, &fTYA, eImplied);

	// Stack Instructions
	//TSX(Addressing, address);
	setIT(0xBA, &fTSX, eImplied);
	//TXS(Addressing, address);
	setIT(0x9A, &fTXS, eImplied);
	//PHA(Addressing, address);
	setIT(0x48, &fPHA, eImplied);
	//PHP(Addressing, address);
	setIT(0x08, &fPHP, eImplied);
	//PLA(Addressing, address);
	setIT(0x68, &fPLA, eImplied);
	//PLP(Addressing, address);
	setIT(0x28, &fPLP, eImplied);

	// Subroutine Instructions
	//JSR(Addressing, address);
	setIT(0x20, &fJSR, eAbsolute);
	//RTS(Addressing, address);
	setIT(0x60, &fRTS, eImplied);
	//RTI(Addressing, address);
	setIT(0x40, &fRTI, eImplied);

	// Set/Reset Insutrctions
	//CLC(Addressing, address);
	setIT(0x18, &fCLC, eImplied);
	//CLD(Addressing, address);
	setIT(0xD8, &fCLD, eImplied);
	//CLI(Addressing, address);
	setIT(0x58, &fCLI, eImplied);
	//CLV(Addressing, address);
	setIT(0xB8, &fCLV, eImplied);
	//SEC(Addressing, address);
	setIT(0x38, &fSEC, eImplied);
	//SED(Addressing, address);
	setIT(0xF8, &fSED, eImplied);
	//SEI(Addressing, address);
	setIT(0x78, &fSEI, eImplied);

	// NOP/BRK Instructions
	//NOP(Addressing, address);
	setIT(0xEA, &fNOP, eImplied);
	//BRK(Addressing, address);
	setIT(0x00, &fBRK, eImplied);
}