def nonbasic_instructions(self, op, a):
# parse the opcode first, so it Defers right of the bat if this is an
# illegal opcode
o = self.special_opcode(op)
a, first_word = self.values.parse(a)
if first_word == None:
return [from_instruction(0x0, o, a,)]
else:
return [from_instruction(0x0, o, a,), first_word]
def instruction(self, op, b, a):
# parse the opcode first, so it Defers right of the bat if this is an
# illegal opcode
o = self.opcode(op)
# get the value codes and extra words for each argument
a, first_word = self.values.parse(a)
b, second_word = self.values.parse(b)
# filter out Nones
not_nones = list(n for n in (first_word, second_word) if n != None)
return [from_instruction(o, b, a)] + not_nones
def test_from_instruction(self):
for code, (eo, eb, ea) in instructions.items():
self.assertEquals(from_instruction(eo, eb, ea), code)
