CPUAnalysis.cpp

#include <windows.h>
#include "main.h"
#include "cpu.h"
#include "debugger.h"

int DelaySlotEffectsCompare (DWORD PC, DWORD Reg1, DWORD Reg2) {
	OPCODE Command;

	if (!r4300i_LW_VAddr(PC + 4, &Command.Hex)) {
		DisplayError(GS(MSG_FAILED_TO_LW));
		ExitThread(0);
	}

	switch (Command.op) {
	case R4300i_SPECIAL:
		switch (Command.funct) {
		case R4300i_SPECIAL_SLL:
		case R4300i_SPECIAL_SRL:
		case R4300i_SPECIAL_SRA:
		case R4300i_SPECIAL_SLLV:
		case R4300i_SPECIAL_SRLV:
		case R4300i_SPECIAL_SRAV:
		case R4300i_SPECIAL_ADD:
		case R4300i_SPECIAL_ADDU:
		case R4300i_SPECIAL_SUB:
		case R4300i_SPECIAL_SUBU:
		case R4300i_SPECIAL_AND:
		case R4300i_SPECIAL_OR:
		case R4300i_SPECIAL_XOR:
		case R4300i_SPECIAL_SLT:
		case R4300i_SPECIAL_SLTU:
		case R4300i_SPECIAL_DADD:
		case R4300i_SPECIAL_DADDU:
		case R4300i_SPECIAL_DSUB:
		case R4300i_SPECIAL_DSUBU:
		case R4300i_SPECIAL_DSLL32:
		case R4300i_SPECIAL_DSRL32:
		case R4300i_SPECIAL_DSRA32:
			if (Command.rd == 0) { return FALSE; }
			if (Command.rd == Reg1) { return TRUE; }
			if (Command.rd == Reg2) { return TRUE; }
			break;
		case R4300i_SPECIAL_MULT:
		case R4300i_SPECIAL_MULTU:
		case R4300i_SPECIAL_DIV:
		case R4300i_SPECIAL_DIVU:
		case R4300i_SPECIAL_DMULT:
		case R4300i_SPECIAL_DMULTU:
		case R4300i_SPECIAL_DDIV:
		case R4300i_SPECIAL_DDIVU:
			break;
		default:
			DisplayError("Does %s effect Delay slot at %X?",R4300iOpcodeName(Command.Hex,PC+4), PC);
			return TRUE;
		}
		break;
	case R4300i_CP1:
		DisplayError("Does %s effect Delay slot at %X?",R4300iOpcodeName(Command.Hex,PC+4), PC);
		/* should do a switch */
		break;
	case R4300i_ANDI:
	case R4300i_ORI:
	case R4300i_XORI:
	case R4300i_LUI:
	case R4300i_ADDI:
	case R4300i_ADDIU:
	case R4300i_SLTI:
	case R4300i_SLTIU:
	case R4300i_DADDI:
	case R4300i_DADDIU:
	case R4300i_LB:
	case R4300i_LH:
	case R4300i_LW:
	case R4300i_LBU:
	case R4300i_LHU:
	case R4300i_LD:
	case R4300i_LWC1:
	case R4300i_LDC1:
		if (Command.rt == 0) { return FALSE; }
		if (Command.rt == Reg1) { return TRUE; }
		if (Command.rt == Reg2) { return TRUE; }
		break;
	case R4300i_SB: break;
	case R4300i_SH: break;
	case R4300i_SW: break;
	case R4300i_SWR: break;
	case R4300i_SWL: break;
	case R4300i_SWC1: break;
	case R4300i_SDC1: break;
	case R4300i_SD: break;
	default:
		DisplayError("Does %s effect Delay slot at %X?",R4300iOpcodeName(Command.Hex,PC+4), PC);
		return TRUE;
	}
	return FALSE;
}