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// 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 (*func)(Addressing, address);
#define InstructionTableSize (256*(sizeof(uintptr_t) + sizeof(Addressing)))
/*
uintptr_t getITFunction(int i){ //Segmentation fault is occurring here, likely in next one too
uintptr_t 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){
uintptr_t a = (IT + (sizeof(uintptr_t) * i));
memcpy(&func, a, sizeof(uintptr_t));
Addressing* r = (IT + ((sizeof(uintptr_t)*256) + (sizeof(Addressing) * i)));
func(*r, val);
}
void initIT(){
IT = malloc(InstructionTableSize);
FILE* fs = fopen("instructions.bin", "r");
/*if (fs == NULL){
system("instruction-dump");
}*/
for(char* c = IT; c < (IT + InstructionTableSize); c++){ //NEED TO MAKE (IT + (256*(sizeof(uintptr_t) + sizeof(Addressing)))) a macro
*c = fgetc(fs);
} //Investigate whether doing word sized units would increase speed
fclose(fs);
//read in the instruction data binary
}
// 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);
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