79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
from .tools import *
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from ..hdl.ast import *
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from ..back.pysim import *
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from ..lib.coding import *
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class EncoderTestCase(FHDLTestCase):
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def test_basic(self):
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enc = Encoder(4)
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with Simulator(enc) as sim:
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def process():
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self.assertEqual((yield enc.n), 1)
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self.assertEqual((yield enc.o), 0)
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yield enc.i.eq(0b0001)
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yield Delay()
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self.assertEqual((yield enc.n), 0)
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self.assertEqual((yield enc.o), 0)
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yield enc.i.eq(0b0100)
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yield Delay()
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self.assertEqual((yield enc.n), 0)
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self.assertEqual((yield enc.o), 2)
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yield enc.i.eq(0b0110)
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yield Delay()
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self.assertEqual((yield enc.n), 1)
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self.assertEqual((yield enc.o), 0)
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sim.add_process(process)
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class PriorityEncoderTestCase(FHDLTestCase):
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def test_basic(self):
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enc = PriorityEncoder(4)
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with Simulator(enc) as sim:
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def process():
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self.assertEqual((yield enc.n), 1)
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self.assertEqual((yield enc.o), 0)
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yield enc.i.eq(0b0001)
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yield Delay()
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self.assertEqual((yield enc.n), 0)
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self.assertEqual((yield enc.o), 0)
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yield enc.i.eq(0b0100)
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yield Delay()
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self.assertEqual((yield enc.n), 0)
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self.assertEqual((yield enc.o), 2)
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yield enc.i.eq(0b0110)
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yield Delay()
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self.assertEqual((yield enc.n), 0)
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self.assertEqual((yield enc.o), 1)
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sim.add_process(process)
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class DecoderTestCase(FHDLTestCase):
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def test_basic(self):
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dec = Decoder(4)
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with Simulator(dec) as sim:
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def process():
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self.assertEqual((yield enc.o), 0b0001)
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yield enc.i.eq(1)
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yield Delay()
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self.assertEqual((yield enc.o), 0b0010)
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yield enc.i.eq(3)
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yield Delay()
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self.assertEqual((yield enc.o), 0b1000)
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yield enc.n.eq(1)
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yield Delay()
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self.assertEqual((yield enc.o), 0b0000)
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sim.add_process(process)
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