117 lines
3.6 KiB
Python
117 lines
3.6 KiB
Python
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# nmigen: UnusedElaboratable=no
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import unittest
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from ...compat import *
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from ...compat.genlib.coding import *
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from .support import SimCase
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class EncCase(SimCase, unittest.TestCase):
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class TestBench(Module):
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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(len(self.tb.dut.i), 8)
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self.assertEqual(len(self.tb.dut.o), 3)
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self.assertEqual(len(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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def gen():
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for _ in range(256):
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if seq:
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yield self.tb.dut.i.eq(seq.pop(0))
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yield
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if (yield self.tb.dut.n):
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self.assertNotIn((yield self.tb.dut.i), [1<<i for i in range(8)])
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else:
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self.assertEqual((yield self.tb.dut.i), 1<<(yield self.tb.dut.o))
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self.run_with(gen())
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class PrioEncCase(SimCase, unittest.TestCase):
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class TestBench(Module):
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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(len(self.tb.dut.i), 8)
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self.assertEqual(len(self.tb.dut.o), 3)
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self.assertEqual(len(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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def gen():
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for _ in range(256):
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if seq:
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yield self.tb.dut.i.eq(seq.pop(0))
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yield
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i = yield self.tb.dut.i
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if (yield self.tb.dut.n):
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self.assertEqual(i, 0)
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else:
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o = yield self.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(gen())
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class DecCase(SimCase, unittest.TestCase):
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class TestBench(Module):
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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(len(self.tb.dut.i), 3)
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self.assertEqual(len(self.tb.dut.o), 8)
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self.assertEqual(len(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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def gen():
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for _ in range(256):
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if seq:
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i = seq.pop()
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yield self.tb.dut.i.eq(i//2)
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yield self.tb.dut.n.eq(i%2)
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yield
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i = yield self.tb.dut.i
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o = yield self.tb.dut.o
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if (yield self.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(gen())
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class SmallPrioEncCase(SimCase, unittest.TestCase):
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class TestBench(Module):
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def __init__(self):
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self.submodules.dut = PriorityEncoder(1)
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def test_sizes(self):
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self.assertEqual(len(self.tb.dut.i), 1)
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self.assertEqual(len(self.tb.dut.o), 1)
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self.assertEqual(len(self.tb.dut.n), 1)
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def test_run_sequence(self):
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seq = list(range(1))
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def gen():
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for _ in range(5):
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if seq:
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yield self.tb.dut.i.eq(seq.pop(0))
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yield
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i = yield self.tb.dut.i
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if (yield self.tb.dut.n):
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self.assertEqual(i, 0)
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else:
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o = yield self.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(gen())
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