def test_mux8(self):
a = Bus(8)
b = Bus(8)
select = Wire()
out = Bus(8)
inputs = Bus([a, b, select])
Mux8(a=a, b=b, select=select, out=out)
for x in [0, 1, 2, 10, 42, 64, 77, 99, 100, 127, 128, 196, 254, 255]:
for y in [
0, 1, 2, 3, 5, 20, 25, 33, 50, 101, 127, 128, 250, 254, 255
]:
inputs.reset()
a.value = x
b.value = y
select.value = False
# print("test_mux8 SELECT = 0 A =", a.value, "B =", b.value, "OUT =", out.value)
self.assertEqual(a.value, out.value, "OUT == A")
inputs.reset()
a.value = x
b.value = y
select.value = True
# print("test_mux8 SELECT = 1 A =", a.value, "B =", b.value, "OUT =", out.value)
self.assertEqual(b.value, out.value, "OUT == B")
def test_add8(self):
a = Bus(8)
b = Bus(8)
out = Bus(8)
cin = Wire()
cout = Wire()
inputs = Bus([a, b, cin])
Add8(a=a, b=b, cin=cin, out=out, cout=cout)
a.value = 2
b.value = 3
cin.value = False
self.assertEqual(out.value, 5)
for x in [0, 1, 2, 10, 42, 64, 77, 99, 100, 127, 128, 196, 254, 255]:
for y in [
0, 1, 2, 3, 5, 20, 25, 33, 50, 101, 127, 128, 250, 254, 255
]:
for z in [0, 1]:
inputs.reset()
a.value = x
b.value = y
cin.value = bool(z)
# print("test_add8", x, "+", y, "+", z, "=", out.value)
self.assertEqual(out.value, (x + y + z) % 256)
self.assertIs(cout.value, x + y + z >= 256)
def test_and8(self):
a = Bus(8)
b = Bus(8)
out = Bus(8)
And8(a=a, b=b, out=out)
a.value = 3
b.value = 6
self.assertEqual(out.value, 2)
def test_not8(self):
inp = Bus(8)
out = Bus(8)
Not8(inp=inp, out=out)
inp.value = 42
self.assertEqual(out.value, 213)