def __init__(self):
self._parser = Parser()
self._registers = OrderedDict([
('S' + str(i), uint8(0))
for i in [*range(10), *[j for j in 'ABCDEF']]
])
self._instructions = {addr: None for addr in range(1024)}
self._ram = {addr: uint8(0) for addr in range(64)}
self._labels = {}
self._carry = 0
self._zero = 0
self._stack = []
self._interrupt_enabled = False
self._pre_zero = 0
self._pre_carry = 0
self._interrupt_caused = False
self._program_cnt = 0
lex.lex(module=tokenizer_rules)
self._parser.tokens = tokenizer_rules.tokens
self._yacc = yacc.yacc(module=self._parser)
self.__handlers = {
ADD: self._handle_ADD,
ADDC: self._handle_ADDC,
AND: self._handle_AND,
CALL: self._handle_CALL,
COMP: self._handle_COMP,
DINT: self._handle_DINT,
EINT: self._handle_EINT,
FETCH: self._handle_FETCH,
IN: self._handle_IN,
JUMP: self._handle_JUMP,
LOAD: self._handle_LOAD,
OR: self._handle_OR,
OUT: self._handle_OUT,
RET: self._handle_RET,
RETI: self._handle_RETI,
RL: self._handle_RL,
SL0: self._handle_SL0,
SL1: self._handle_SL1,
SLA: self._handle_SLA,
SLX: self._handle_SLX,
RR: self._handle_RR,
SR0: self._handle_SR0,
SR1: self._handle_SR1,
SRA: self._handle_SRA,
SRX: self._handle_SRX,
STORE: self._handle_STORE,
SUB: self._handle_SUB,
SUBC: self._handle_SUBC,
TEST: self._handle_TEST,
XOR: self._handle_XOR,
}
def _handle_IN(self, *args):
# there could be some port simulator in further version of VM class,
# for now we assume that there are only zeros on input
if args[1] < 0 or args[1] > 63:
raise ValueError('Error in address {0}: no such port "{1}"'.format(
str(self._program_cnt), args[1]))
self.registers[args[0]] = uint8(0)
self._program_cnt += 1
def _handle_LOAD(self, *args):
self.registers[args[0]] = uint8(args[1])
self._program_cnt += 1
def test_getitem():
assert uint8(16)[4] == 1
assert uint8(16)[5] == 0
for i in range(8):
assert uint8(255)[i] == 1
assert uint8(0)[i] == 0
def test_lshift():
assert (uint8(0), 1) == uint8(128) << 1
assert (uint8(128), 1) == uint8(192) << 1
assert (uint8(64), 0) == uint8(32) << 1
def test_constructor2():
assert uint8(256) == uint8(0)
assert uint8(260) == uint8(4)
assert uint8(-1) == uint8(255)
assert uint8(-5) == uint8(251)
assert uint8(-5) != uint8(252)
def test_eq_int():
assert uint8(42) == 42
assert uint8(256) == 0
assert uint8(-1) == 255
def test_mod():
assert uint8(32) % 2 == 0
assert uint8(5) % uint8(2) == 1
def test_and_other():
assert uint8(24) == uint8(31) & uint8(24)
assert uint8(0) == uint8(17) & uint8(12)
val = uint8(31)
val &= uint8(24)
assert val == uint8(24)
def test_and_int():
assert uint8(24) == uint8(31) & 24
assert uint8(0) == uint8(17) & 12
val = uint8(31)
val &= 24
assert val == uint8(24)
def test_sub_int():
assert (uint8(246), 1) == uint8(20) - 30
assert (uint8(239), 0) == uint8(250) - 11
assert (uint8(7), 0) == uint8(1) - -6
def test_constructor1():
assert int(uint8(20)) == 20
def test_sub_other():
assert (uint8(246), 1) == uint8(20) - uint8(30)
assert (uint8(239), 0) == uint8(250) - uint8(11)
def test_add_int():
assert (uint8(50), 0) == uint8(20) + 30
assert (uint8(5), 1) == uint8(250) + 11
assert (uint8(251), 1) == uint8(1) + -6
def test_add_other():
assert (uint8(50), 0) == uint8(20) + uint8(30)
assert (uint8(5), 1) == uint8(250) + uint8(11)