refactoring of src/cpu/

1 files changed, 9 insertions, 179 deletions

diff --git a/src/cpu/addressing.h b/src/cpu/addressing.h
index 29fa87c..d0320b8 100644
--- a/src/cpu/addressing.h
+++ b/src/cpu/addressing.h
@@ -1,6 +1,11 @@
 //	addressing.h
 //	Contains definitions relevant to addressing, as well as fAddress() which returns time, length, value, and address for an instruction function call.
 
+#ifndef ADDRESSING_H
+#define ADDRESSING_H
+
+#include"core.h"
+
 enum Addressing {
 	eImmediate,
 	eAccumulator,
@@ -26,190 +31,15 @@ typedef struct AddData{
 	byte value;
 } AddData;
 
-//typedef struct AddData AddData;
-
-#include"instructions/init.h"
+#include"instructions.h"
 
 //Holds address of current instruction.
 void* current_instruction;
 
 #define getInstructionLength(c) fAddressGetLength(*getInstructionTableAddressing(c))
 
-int fAddressGetLength(Addressing addr){
-	switch(addr){
-		case eAbsolute: case eAbsoluteIndexedX: case eAbsoluteIndexedY:
-			return 3;
-		case eAccumulator: case eImplied:
-			return 1;
-		default:
-			return 2;
-	}
-}
-
-AddData fAddress(Addressing addr, short x) {
-	AddData ret;
-
-	// ADDRESS
-
-	switch(addr){
-		case eImplied:
-		case eIndirectAbsolute:
-		case eRelative:
-		case eImmediate:
-		case eAccumulator:
-			ret.add = 0x0000;
-			break;
-
-		case eAbsolute:
-			ret.add = x;
-			break;
-		case eAbsoluteIndexedX:
-			ret.add = (x + X);
-			break;
-		case eAbsoluteIndexedY:
-			ret.add = (x + Y);
-			break;
-
-		case eZeroPage:
-			ret.add = (x & 0x00FF);
-			break;
-		case eZeroPageIndexedX:
-			ret.add = ((x + X) & 0x00FF);
-			break;
-		case eZeroPageIndexedY:
-			ret.add = ((x + Y) & 0x00FF);
-			break;
-
-		case eIndexedIndirect:
-			ret.add = ((getMemory(x+X+1))<<8) + (getMemory(x+X));
-			break;
-		case eIndirectIndexed:
-			ret.add = ((getMemory(x+1))<<8) + (getMemory(x)) + Y;
-			break;
-	}
-
-	//	VALUE
-
-	switch(addr){
-		case eImplied:
-		case eIndirectAbsolute:
-		case eRelative:
-			break;
-		
-		case eImmediate:
-			ret.value = x;
-			break;
-
-		case eAccumulator:
-			ret.value = acc;
-			break;
-
-		default:
-			ret.value = getMemory(ret.add);
-	}
-
-	// LENGTH
-
-	ret.length = fAddressGetLength(addr);
-
-	// CYCLES
-
-	//case &fADC: case &fAND: case &fBIT: case &fCMP: case &fCPX: case &fCPY:	case &fEOR:	case &fLDA:
-	//case &fLDX: case &fLDY: case &fORA: case &fSBC: case &fSTX: case &fSTY:
-
-	if (	current_instruction ==  &fADC || current_instruction ==  &fAND || current_instruction == &fBIT || current_instruction ==  &fCMP || current_instruction ==  &fCPX
-		||	current_instruction ==  &fCPY || current_instruction ==  &fEOR || current_instruction == &fLDA || current_instruction ==  &fLDX || current_instruction ==  &fLDY
-		||	current_instruction ==  &fORA || current_instruction ==  &fSBC || current_instruction == &fSTX || current_instruction ==  &fSTY	){
-		switch(addr){
-			case eImmediate:
-				ret.cycles = 2; break;
-			case eZeroPage:
-				ret.cycles = 3; break;
-			case eZeroPageIndexedX: case eAbsolute: case eAbsoluteIndexedX: case eAbsoluteIndexedY:
-				ret.cycles = 4; break;
-			case eIndexedIndirect:
-				ret.cycles = 6; break;
-			case eIndirectIndexed:
-				ret.cycles = 5; break;
-		}
-	}
-
-	//case &fASL: case &fDEC: case &fINC: case &fLSR: case &fROL: case &fROR:
-	else if(	current_instruction ==  &fASL || current_instruction ==  &fDEC || current_instruction == &fINC
-			||	current_instruction ==  &fLSR || current_instruction ==  &fROL || current_instruction == &fROR	){
-		switch(addr){
-			case eAccumulator:
-				ret.cycles = 2; break;
-			case eZeroPage:
-				ret.cycles = 5; break;
-			case eZeroPageIndexedX: case eAbsolute:
-				ret.cycles = 6; break;
-			case eAbsoluteIndexedX:
-				ret.cycles = 7; break;
-		}
-	}
-
-	//case &fSTA:
-	else if  (current_instruction == &fSTA){
-		switch(addr){
-			case eZeroPage:
-				ret.cycles = 3; break;
-			case eZeroPageIndexedX: case eAbsolute:
-				ret.cycles = 4; break;
-			case eAbsoluteIndexedX: case eAbsoluteIndexedY:
-				ret.cycles = 5; break;
-			case eIndexedIndirect: case eIndirectIndexed:
-				ret.cycles = 6; break;
-		}
-	}
-
-
-	//case &fBRK:
-	else if (current_instruction == &fBRK){
-		ret.cycles = 7;
-	}
-
-
-	//case &fRTI: case &fRTS: case &fJSR:
-	else if (current_instruction == &fRTI || current_instruction == &fRTS || current_instruction == &fJSR){
-		ret.cycles = 6;
-	}
-
-	//case &fJMP:
-	else if (current_instruction == &fJMP){
-		ret.cycles = 5;
-	}
-
-	//case &fPLA: case &fPLP:
-	else if (current_instruction == &fPLA || current_instruction == &fPLP){
-		ret.cycles = 4;
-	}
-
-	//case &fPHA: case &fPHP:
-	else if (current_instruction == &fPHA || current_instruction == &fPHP){
-		ret.cycles = 3;
-	}
-
-	else {
-		ret.cycles = 2;
-	}
-
-
-	// Page Boundary
-
-	//case &fADC: case &fSBC: case &fLDA: case &fLDX: case &fLDY: case &fEOR: case &fAND: case &fORA: case &fCMP:
-	if (	current_instruction ==  &fADC || current_instruction ==  &fSBC || current_instruction == &fLDA || current_instruction ==  &fLDX || current_instruction ==  &fLDY
-		||	current_instruction ==  &fEOR || current_instruction ==  &fAND || current_instruction == &fORA || current_instruction ==  &fCMP ){
-		switch(addr){
-			case eAbsoluteIndexedX: 
-				if ((x & 0xFF00) != ((x + X) & 0xFF00)) ret.cycles++; break;
-			case eAbsoluteIndexedY: 
-				if ((x & 0xFF00) != ((x + Y) & 0xFF00)) ret.cycles++; break;
-			case eIndirectIndexed:
-				if ((ret.add & 0xFF00) != (ret.add - Y & 0xFF00)) ret.cycles++; break;
-		}
-	}
+int fAddressGetLength(Addressing addr);
 
-	return ret;
-}
+AddData fAddress(Addressing addr, short x);
 
+#endif
\ No newline at end of file