def decode(self, registers: Registers, *args, **kwargs) -> str:
if self.rd_number == 0 and self.rs_number == 0:
return NopInstruction()(self.word).decode(registers)
rd_name = registers.get_register_name(self.rd_number)
rt_name = registers.get_register_name(self.rt_number)
return (f"{self.instruction_name} "
f"{rd_name}, {rt_name}, {self.shamt_value}")
def decode(self, registers: Registers, coprocessor: COProcessor, *args,
**kwargs) -> str:
ft_name = coprocessor.registers.get_register_name(self.ft_number)
rs_number = self.base
rs_name = registers.get_register_name(rs_number)
offset = self.offset
return f"{self.instruction_name} {ft_name}, {offset}({rs_name})"
def execute(self, registers: Registers, program_counter, memory: Memory,
*args, **kwargs):
rs_register = registers.get_register(self.rs_number)
new_pc = rs_register.to_unsigned_int()
branch_delayed_word = memory.load(program_counter + 4)
branch_delayed_instruction = kwargs['instruction_factory'].factory(
branch_delayed_word)
delayed_registers, delayed_pc, delayed_memory, coproc = branch_delayed_instruction.execute(
registers=registers,
program_counter=program_counter + 4,
memory=memory,
*args,
**kwargs)
return delayed_registers, new_pc, delayed_memory, kwargs[
'coprocessor'].registers
def decode(self, registers: Registers, coprocessor: COProcessor, *args, **kwargs) -> str:
fs_name = coprocessor.registers.get_register_name(self.fs_number)
rt_name = registers.get_register_name(self.rt_number)
return f"{self.instruction_name} {rt_name}, {fs_name}"
def decode(self, registers: Registers, *args, **kwargs) -> str:
rs_name = registers.get_register_name(self.rs_number)
rt_name = registers.get_register_name(self.rt_number)
return f"{self.instruction_name} {rs_name}, {rt_name}"
def decode(self, registers: Registers, *args, **kwargs) -> str:
rs_name = registers.get_register_name(self.rs_number)
rt_name = registers.get_register_name(self.rt_number)
immediate_value = self.imediate
return f"{self.instruction_name} {rt_name}, {rs_name}, {immediate_value}" # noqa: E501
def decode(self, registers: Registers, *args, **kwargs) -> str:
rs_name = registers.get_register_name(self.rs_number)
rt_name = registers.get_register_name(self.rt_number)
immediate_value = (((1 << 16) - 1) & (self.word.data >> (0)))
return f"{self.instruction_name} {rt_name}, {rs_name}, {immediate_value}" # noqa: E501
def decode(self, registers: Registers, *args, **kwargs) -> str:
rd_name = registers.get_register_name(self.rd_number)
rt_name = registers.get_register_name(self.rt_number)
return (f"{self.instruction_name} "
f"{rd_name}, {rt_name}, {self.shamt_value}")
def test_get_all_valid_registers(self):
registers = Registers()
for x in range(32):
register = registers.get_register(x)
assert isinstance(register, Register)
def test_register_name(self):
register_name = "$a0"
register_number = 4
registers = Registers()
assert register_name == registers.get_register_name(register_number)
def test_modify_register_value(self):
new_value = 42
registers = Registers()
# register No 4 is register a0
registers.set_register_value(4, new_value)
assert new_value == registers.get_register_value(4)
def test_get_invalid_register(self):
registers = Registers()
with pytest.raises(InvalidRegister):
registers.get_register(-1)
registers.registers(100)
def test_all_registers_initialized_with_zero(self):
registers = Registers()
for x in range(32):
register_value = registers.get_register_value(x)
assert register_value == 0
