@Test public void shouldSimulateStoreWordWithoutHazard() throws UnreachableLabelException, InvalidInstructionException { Instruction first = new InstructionIType("sw $t0, 15($s1)"); Datapath datapath = new Datapath(Arrays.asList(first), new HashMap<String, Integer>()); rBank.setValue("t0", 7); // First Stage datapath.moveForward(); // Second Stage datapath.moveForward(); assertEquals(new Integer(0), datapath.getIdEx().getReadData1()); assertEquals(new Integer(15), datapath.getIdEx().getReadData2()); // Third Stage datapath.moveForward(); // o valor do registrador ser� registrado no endere�o 15 da mem�ria. assertEquals( 15, datapath .getExMem() .getALUOut()); // $s1 estava como zero, por isso a soma � 15 (que � a constante) assertTrue(datapath.getExMem().isMemWrite()); assertFalse(datapath.getExMem().isMemRead()); assertFalse(datapath.getExMem().isRegWrite()); // Fourth Stage datapath.moveForward(); assertEquals(7, memory.read(15)); // grava o valor do registrador na mem�ria }
/** * Exemplo do slide passado em aula * * @throws InvalidInstructionException * @throws UnreachableLabelException */ @Test public void shouldSimulateLWHazard() throws UnreachableLabelException, InvalidInstructionException { Instruction first = new InstructionIType("lw $s2, 20($s1)"); Instruction second = new InstructionRType("and $s4, $s2, $s5"); Instruction third = new InstructionRType("or $s8, $s2, s6"); Instruction fourth = new InstructionRType("add $s7, $s4, $s2"); Datapath datapath = new Datapath(Arrays.asList(first, second, third, fourth), new HashMap<String, Integer>()); datapath.moveForward(); fail( "Terminar de implementar o teste que cause uma bolha no pipeline para esperar a instru��o lw"); }
@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")); }
@Test public void shouldSimulateJump() throws InvalidInstructionException, UnreachableLabelException { Instruction first = new InstructionJType("j LABEL"); Instruction second = new InstructionIType("addi $s1, $zero, 15"); Instruction third = new InstructionRType("add $s2, $zero, $s3"); Map<String, Integer> labels = new HashMap(); labels.put("LABEL", 3); Datapath datapath = new Datapath(Arrays.asList(first, second, third), labels); // First Cycle // Stage 1 : Jump // Stage 2: NOP datapath.moveForward(); System.out.println(datapath.getIfId().getInstructionFetched().getOperation()); // Second Cycle // Stage 1 : NOP // Stage 2: Jump datapath.moveForward(); System.out.println(datapath.getIfId().getInstructionFetched().getOperation()); // Third Stage // Stage 1 : addi $s2 // Stage 2 : NOP // Stage 3 : Jump datapath.moveForward(); System.out.println(datapath.getIfId().getInstructionFetched().getOperation()); // Fourth Stage datapath.moveForward(); System.out.println(datapath.getIfId().getInstructionFetched().getOperation()); // addi $s2, $zero, 20 }
@Test public void shouldProcessFirstStep() throws UnreachableLabelException, InvalidInstructionException { Instruction first = new InstructionIType("li $s0, 15"); Instruction second = new InstructionIType("li $s1, 25"); Instruction third = new InstructionRType("add $s2, $s1, $s0"); Instruction fourth = new InstructionIType("addi $s3, $s2, 15"); Datapath datapath = new Datapath(Arrays.asList(first, second, third, fourth), new HashMap<String, Integer>()); datapath.moveForward(); assertEquals("li", 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("li", datapath.getIfId().getInstructionFetched().getOperation()); assertEquals("li", datapath.getIdEx().getInstructionFetched().getOperation()); assertEquals("NOP", datapath.getExMem().getInstructionFetched().getOperation()); assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation()); datapath.moveForward(); assertEquals("add", datapath.getIfId().getInstructionFetched().getOperation()); assertEquals("li", datapath.getIdEx().getInstructionFetched().getOperation()); assertEquals("li", datapath.getExMem().getInstructionFetched().getOperation()); assertEquals("NOP", datapath.getMemWb().getInstructionFetched().getOperation()); assertEquals(15, datapath.getExMem().getALUOut()); datapath.moveForward(); assertEquals("addi", datapath.getIfId().getInstructionFetched().getOperation()); assertEquals("add", datapath.getIdEx().getInstructionFetched().getOperation()); assertEquals("li", datapath.getExMem().getInstructionFetched().getOperation()); assertEquals("li", datapath.getMemWb().getInstructionFetched().getOperation()); assertEquals(25, datapath.getExMem().getALUOut()); datapath.moveForward(); assertEquals("NOP", datapath.getIfId().getInstructionFetched().getOperation()); /*assertEquals("addi", datapath.getIdEx().getInstructionFetched().getOperation()); assertEquals("add", datapath.getExMem().getInstructionFetched().getOperation()); assertEquals("li", datapath.getMemWb().getInstructionFetched().getOperation()); assertEquals(25, datapath.getExMem().getALUOut()); assertEquals(15, rBank.getValue("s0")); //J� carregou o valor de 15 para o banco de registradores no quinto ciclo assertEquals(0, rBank.getValue("s1")); //Mas, ainda n�o carregou o valor do s1... */ // datapath.moveForward(); }
@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 }