def op(self, a, b):
boolean = fn(self, a, b)
if not boolean:
# get the arguments from the next word
_, n_a, n_b = as_opcode(self.RAM[self.registers["PC"]])
# compute the length of the next word's values.
length = self.values[n_a].consumes + self.values[n_b].consumes
# jump ahead that many words.
self.registers["PC"] += 1 + length
def parse_instruction(self, word):
o, a_code, b_code = as_opcode(word)
# if this is a special opcode...
if o == 0x00:
# arguments are switched for the special opcodes
a = self.values[b_code](self)
name = self.special_opcodes[a_code]
# return the name and the arguments
return name, (a,)
else:
a = self.values[a_code](self)
b = self.values[b_code](self)
name = self.opcodes[o]
# return the name of the operation and the arguments
return name, (a, b)
def parse_instruction(self, word, address=None):
o, a_code, b_code = as_opcode(word)
# if this is a special opcode...
if o == 0x00:
# arguments are switched for the special opcodes
a = self.values[b_code](self)
name = self.special_opcodes.get(a_code)
if name == None:
raise OpcodeError(o, address)
# return the name and the arguments
return name, (a,)
else:
a = self.values[a_code](self)
b = self.values[b_code](self)
name = self.opcodes.get(o)
if name == None:
raise OpcodeError(o, address)
# return the name of the operation and the arguments
return name, (a, b)
def test_instructions(self):
for code, (eo, ea, eb) in instructions.items():
o, a, b = as_opcode(code)
#print "expected: %x %x %x" % (eo, ea, eb)
#print "got : %x %x %x" % (o, a, b)
self.assertEqual((eo, ea, eb), (o, a, b))
