def test_create_from_byte_raises_on_empty_byte(self):
with self.assertRaises(ValueTypeError) as context:
Value.create_from_byte(b"")
self.assertEqual("No byte available for reading", str(context.exception))
def test_value_create_from_str_symbol_correct(self):
result = Value.create_from_str("symbol", self.instruction)
self.assertTrue(result.is_symbol())
def test_value_create_from_str_raises_on_bad_value(self):
with self.assertRaises(ValueTypeError) as context:
Value.create_from_str("invalid!", self.instruction)
self.assertEqual("[invalid!] is an invalid value", str(context.exception))
def test_value_create_from_str_string_correct(self):
result = Value.create_from_str("'$DEAD'", self.fcc_instruction)
self.assertTrue(result.is_string())
self.assertEqual("$DEAD", result.ascii())
def test_value_create_from_str_numeric_correct(self):
result = Value.create_from_str("$DEAD", self.instruction)
self.assertTrue(result.is_numeric())
self.assertEqual("DEAD", result.hex())
def test_value_get_symbol_no_symbol_table_raises(self):
with self.assertRaises(ValueError) as context:
Value.get_symbol("blah", {})
self.assertEqual("[blah] not in symbol table", str(context.exception))
def test_create_from_string_16_bit_immediate_instruction_size_correct_string_literal(self):
instruction = Instruction(mnemonic="ZZZ", mode=Mode(imm=0xDE, imm_sz=2), is_16_bit=True)
result = Value.create_from_str("#'A", instruction)
self.assertEqual(65, result.int)
self.assertEqual(4, result.size_hint)
def translate(self):
if not self.instruction.mode.ind:
raise OperandTypeError(
"Instruction [{}] does not support indexed addressing".format(self.instruction.mnemonic)
)
size = self.instruction.mode.ind_sz
if not type(self.value) == str and self.value.is_address():
size += 2
return CodePackage(
op_code=NumericValue(self.instruction.mode.ind),
post_byte=NumericValue(0x9F),
additional=self.value,
size=size,
max_size=size,
)
if not type(self.value) == str and self.value.is_numeric():
size += 2
return CodePackage(
op_code=NumericValue(self.instruction.mode.ind),
post_byte=NumericValue(0x9F),
additional=self.value,
size=size,
max_size=size,
)
raw_post_byte = 0x80
post_byte_choices = []
size = self.instruction.mode.ind_sz
max_size = size
additional = NoneValue()
additional_needs_resolution = False
if "X" in self.right:
raw_post_byte |= 0x00
if "Y" in self.right:
raw_post_byte |= 0x20
if "U" in self.right:
raw_post_byte |= 0x40
if "S" in self.right:
raw_post_byte |= 0x60
if self.left == "":
if "-" in self.right or "+" in self.right:
if self.right == "X+" or self.right == "Y+" or self.right == "U+" or self.right == "S+":
raise OperandTypeError("[{}] not allowed as an extended indirect value".format(self.right))
if self.right == "-X" or self.right == "-Y" or self.right == "-U" or self.right == "-S":
raise OperandTypeError("[{}] not allowed as an extended indirect value".format(self.right))
if "++" in self.right:
raw_post_byte |= 0x11
if "--" in self.right:
raw_post_byte |= 0x13
else:
raw_post_byte |= 0x14
elif self.left == "A" or self.left == "B" or self.left == "D":
if self.left == "A":
raw_post_byte |= 0x16
if self.left == "B":
raw_post_byte |= 0x15
if self.left == "D":
raw_post_byte |= 0x1B
else:
if "+" in self.right or "-" in self.right:
raise OperandTypeError("[{}] invalid indexed expression".format(self.operand_string))
if type(self.left) == str:
self.left = Value.create_from_str(self.left)
if self.left.is_address():
additional_needs_resolution = True
self.left = NumericValue(self.left.int)
if self.left.is_expression():
additional_needs_resolution = True
if self.left.is_address_expression():
additional_needs_resolution = True
additional = self.left
if "PCR" in self.right:
if additional_needs_resolution:
raw_post_byte |= 0x00
post_byte_choices = [0x9C, 0x9D]
max_size += 2
else:
size += 2 if self.left.is_extended() else 1
max_size = size
raw_post_byte |= 0x9D if self.left.is_extended() else 0x9C
else:
size += additional.byte_len()
max_size = size
raw_post_byte |= 0x99 if self.left.is_extended() else 0x98
return CodePackage(
op_code=NumericValue(self.instruction.mode.ind),
post_byte=NumericValue(raw_post_byte),
post_byte_choices=post_byte_choices,
additional=additional,
size=size,
max_size=max_size,
additional_needs_resolution=additional_needs_resolution,
)
