def get_instruction(self, location=None):
state = State(self, location)
# unpack the opcode, a, and b
op, b, a = as_instruction(next(state.ram_iter))
# get the mnemonic and the method corresponding to it.
if op == 0:
mnemonic = self.special_operations.get(b)
if mnemonic is None:
raise OpcodeError(b, location)
a_value = self.values[a](state, True)
arguments = (a_value,)
state.dis = "{0} {1}".format(mnemonic, a_value.dis)
else:
mnemonic = self.operations.get(op)
if mnemonic is None:
raise OpcodeError(op, location)
a_value = self.values[a](state, True)
b_value = self.values[b](state, False)
arguments = (b_value, a_value)
state.dis = "{0} {1}, {2}".format(mnemonic, b_value.dis,
a_value.dis)
method = getattr(self, mnemonic)
# run the method and decide what changes to do.
return method, arguments, state
def is_conditional(self, instruction):
o, b, a = as_instruction(instruction)
name = self.operations.get(o)
return name is not None and name.startswith("if")
def test_instructions(self):
for code, (eo, eb, ea) in instructions.items():
o, b, a = as_instruction(code)
#print "expected: %x %x %x" % (eo, ea, eb)
#print "got : %x %x %x" % (o, a, b)
self.assertEqual((eo, eb, ea), (o, b, a))