def _(operand):
"""Parse an immediate operand.
Immediate operands are simple values such as 0, 0x10, or 0b10101010, or an expression evaluating
to such a value, such as ord("A").
"""
return Immediate(operand)
def _(operand):
try:
byte = single(operand)
except ValueError as ve:
raise ValueError(
"Immediate8 string operand must contain an single ASCII character. Got {} in {!r}"
.format(len(operand), operand)) from ve
return Immediate(byte)
def test_immediate_hash(a):
assert hash(Immediate(a)) == hash(Immediate(a))
def test_immediate_inequality_different_types(a):
assert Immediate(a) != object()
def test_immediate_inequality(a, b):
assume(a != b)
assert Immediate(a) != Immediate(b)
def test_immediate_equality(a):
assert Immediate(a) == Immediate(a)
def test_bytes_operand_gives_immediate_value(b):
assert parse_operand(b) == Immediate(b[0], 1)
def _(operand):
unsigned = operand.value.to_bytes(2, byteorder="big", signed=True)
return Immediate(int.from_bytes(unsigned, byteorder="big", signed=False),
2)
def _(operand):
return Immediate(operand)
def test_i16_operand():
assert parse_operand(I16(-4567)) == Immediate(60969, 2)
def test_i32_operand():
assert parse_operand(I32(0x45671234)) == Immediate(0x45671234, 4)
def test_i8_operand():
assert parse_operand(I8(-42)) == Immediate(214, 1)
def test_u16_operand():
assert parse_operand(U16(0x4567)) == Immediate(0x4567, 2)
def test_u8_operand():
assert parse_operand(U8(42)) == Immediate(42, 1)
def _(operand):
return Immediate(int.from_bytes(operand, byteorder="big", signed=False),
len(operand))
def test_immediate_value(a):
assert Immediate(a).value == a
def _(operand):
return Immediate(operand.value, 4)
def test_immediate_repr(a):
r = repr(Immediate(a))
assert r.startswith('Immediate')
assert str(a) in r
assert check_balanced(r)
def _(operand):
return Immediate(
int.from_bytes(operand.value.to_bytes(4, byteorder="big", signed=True),
byteorder="big",
signed=False), 4)
def test_immediate_address_assembly():
asm = AsmDsl()
asm(LDA, 0x30)
assert statements(asm) == (LdA(Immediate(0x30)), )