def test_skne_should_skip_if_not_equals(self):
machine = Machine()
machine.PC = 10
machine.VRegisters[2] = 0xBC
skne = Skne()
skne.arg_constant = 0xEE
skne.arg_registers.append(2)
skne.execute(machine)
self.assertTrue(isinstance(skne, JumpInstruction))
self.assertEqual(machine.PC, 14)
def test_jsr_should_call_subroutine(self):
machine = Machine()
machine.PC = 10
jsr = Jsr()
jsr.arg_constant = 0xEEF
jsr.execute(machine)
self.assertTrue(isinstance(jsr, JumpInstruction))
self.assertEqual(machine.PC, 0xEEF)
self.assertEqual(machine.Stack.top(), 12)
def test_skeq_registers_should_not_skip_if_not_equals(self):
machine = Machine()
machine.PC = 10
machine.VRegisters[2] = 0xEE
machine.VRegisters[5] = 0xE4
skeq = SkeqRegister()
skeq.arg_registers.append(2)
skeq.arg_registers.append(5)
skeq.execute(machine)
self.assertTrue(isinstance(skeq, JumpInstruction))
self.assertEqual(machine.PC, 12)
def test_skne_registers_shouldnt_skip_if_equal(self):
machine = Machine()
machine.PC = 10
machine.VRegisters[1] = 5
machine.VRegisters[2] = 5
skne = SkneRegisters()
skne.arg_registers.append(1)
skne.arg_registers.append(2)
skne.execute(machine)
self.assertTrue(isinstance(skne, JumpInstruction))
self.assertEqual(machine.PC, 12)
def execute(self, machine: Machine):
machine.Stack.push(machine.PC + 2)
machine.PC = self.arg_constant
def execute(self, machine: Machine):
machine.PC = self.arg_constant
def execute(self, machine: Machine):
machine.PC = machine.VRegisters[0] + self.arg_constant
def execute(self, machine: Machine):
machine.PC = machine.Stack.pop()