def signed_wrapper(self, state, b_unsigned, a_unsigned):
b = as_signed(b_unsigned)
a = as_signed(a_unsigned)
value = from_signed(fn(self, state, b, a))
# handle overflow for signed values
overflow, result = divmod(value, self.cells)
# NOTE: this clears overflow for all signed operations.
# this may be wrong; I don't care right now.
return value, overflow
def signed_conditional_wrapper(self, state, b, a):
return fn(self, state, as_signed(b), as_signed(a))
def test_as_signed(self):
for v, u in self.values:
self.assertEqual(v, as_signed(u))