@Test
public void shouldExecuteAddiOperation()
throws UnreachableLabelException, InvalidInstructionException {
Instruction first = new InstructionIType("addi $s0, $zero, 23");
Datapath datapath = new Datapath(Arrays.asList(first), new HashMap<String, Integer>());
datapath.moveForward();
assertEquals("addi", datapath.getIfId().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getIdEx().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getExMem().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation());
datapath.moveForward();
assertEquals("NOP", datapath.getIfId().getInstructionFetched().getOperation());
assertEquals("addi", datapath.getIdEx().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getExMem().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation());
datapath.moveForward();
assertEquals("NOP", datapath.getIfId().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getIdEx().getInstructionFetched().getOperation());
assertEquals("addi", datapath.getExMem().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation());
assertEquals(23, datapath.getExMem().getALUOut());
datapath.moveForward();
assertEquals("NOP", datapath.getIfId().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getIdEx().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getExMem().getInstructionFetched().getOperation());
assertEquals("addi", datapath.getMemWb().getInstructionFetched().getOperation());
assertEquals(0, rBank.getValue("s0"));
datapath.moveForward();
assertEquals("NOP", datapath.getIfId().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getIdEx().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getExMem().getInstructionFetched().getOperation());
assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation());
assertEquals(
23,
rBank.getValue("s0")); // S� modificou o valor no banco de registradores no quinto est�gio
}
@Test
public void shoudSimulateLoadWordWithoutHazard()
throws UnreachableLabelException, InvalidInstructionException {
Instruction first = new InstructionIType("lw $t0, 20($s1)");
Datapath datapath = new Datapath(Arrays.asList(first), new HashMap<String, Integer>());
memory.write(20, 15); // na posi��o 20 vou colocar o inteiro 15
// First stage
datapath.moveForward();
// Second Stage
datapath.moveForward();
// Load Word soma o valor do imeadiato com o valor do registrador
// Third Stage
datapath.moveForward();
assertEquals(
20,
datapath
.getExMem()
.getALUOut()); // $s0 estava como zero, por isso a soma � 20 que � a constante
assertTrue(datapath.getExMem().isMemToReg());
assertTrue(datapath.getExMem().isMemRead());
assertFalse(datapath.getExMem().isMemWrite());
assertEquals(0, rBank.getValue("t0")); // o t0 n�o foi inicializado
// Fourth Stage
datapath.moveForward();
assertEquals(15, datapath.getMemWb().getMemoryData());
// Fifth Stage
datapath.moveForward();
assertEquals(15, rBank.getValue("t0"));
}
