83 lines
1.9 KiB
Python
83 lines
1.9 KiB
Python
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import unittest
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from migen.fhdl.std import *
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from migen.genlib.coding import *
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from migen.test.support import SimCase, SimBench
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class EncCase(SimCase):
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class TestBench(SimBench):
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def __init__(self):
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self.submodules.dut = Encoder(8)
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def test_sizes(self):
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self.assertEqual(flen(self.tb.dut.i), 8)
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self.assertEqual(flen(self.tb.dut.o), 3)
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self.assertEqual(flen(self.tb.dut.n), 1)
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def test_run_sequence(self):
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seq = list(range(1<<8))
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cur = None
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def cb(tb, s):
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if seq:
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s.wr(tb.dut.i, seq.pop(0))
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i = s.rd(tb.dut.i)
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if s.rd(tb.dut.n):
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self.assertNotIn(i, [1<<i for i in range(8)])
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else:
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o = s.rd(tb.dut.o)
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self.assertEqual(i, 1<<o)
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self.run_with(cb, 256)
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class PrioEncCase(SimCase):
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class TestBench(SimBench):
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def __init__(self):
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self.submodules.dut = PriorityEncoder(8)
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def test_sizes(self):
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self.assertEqual(flen(self.tb.dut.i), 8)
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self.assertEqual(flen(self.tb.dut.o), 3)
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self.assertEqual(flen(self.tb.dut.n), 1)
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def test_run_sequence(self):
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seq = list(range(1<<8))
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cur = None
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def cb(tb, s):
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if seq:
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s.wr(tb.dut.i, seq.pop(0))
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i = s.rd(tb.dut.i)
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if s.rd(tb.dut.n):
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self.assertEqual(i, 0)
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else:
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o = s.rd(tb.dut.o)
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if o > 0:
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self.assertEqual(i & 1<<(o - 1), 0)
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self.assertGreaterEqual(i, 1<<o)
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self.run_with(cb, 256)
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class DecCase(SimCase):
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class TestBench(SimBench):
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def __init__(self):
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self.submodules.dut = Decoder(8)
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def test_sizes(self):
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self.assertEqual(flen(self.tb.dut.i), 3)
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self.assertEqual(flen(self.tb.dut.o), 8)
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self.assertEqual(flen(self.tb.dut.n), 1)
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def test_run_sequence(self):
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seq = list(range(8*2))
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cur = None
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def cb(tb, s):
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if seq:
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i = seq.pop()
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s.wr(tb.dut.i, i//2)
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s.wr(tb.dut.n, i%2)
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i = s.rd(tb.dut.i)
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o = s.rd(tb.dut.o)
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if s.rd(tb.dut.n):
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self.assertEqual(o, 0)
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else:
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self.assertEqual(o, 1<<i)
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self.run_with(cb, 256)
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