test: remove test_bitslip (now in litex)

test/test_bitslip.py

@@ -1,70 +0,0 @@
-import unittest
-import random
-
-from litex.gen import *
-
-from litedram.phy.bitslip import BitSlip
-
-
-class BitSlipModel:
-    def __init__(self, data_width, latency):
-        self.data_width = data_width
-        self.latency = latency
-
-    def simulate(self, bitslip, sequence):
-        # prepare sequence for simulation
-        s = [0]*self.latency
-        for d in sequence:
-            s.append(d)
-        # simulate bitslip
-        r = []
-        for i in range(len(s)-1):
-            v = (s[i+1] << self.data_width) | s[i]
-            v = v >> bitslip
-            v &= 2**self.data_width-1
-            r.append(v)
-        return r
-
-
-def main_generator(dut):
-    dut.o_sequence = []
-    yield dut.value.eq(dut.bitslip)
-    for i, data in enumerate(dut.i_sequence):
-        yield dut.i.eq(data)
-        dut.o_sequence.append((yield dut.o))
-        yield
-
-
-class TestBitSlip(unittest.TestCase):
-    def bitslip_test(self, data_width, length=128):
-        prng = random.Random(42)
-        sequence = [prng.randrange(2**data_width) for i in range(length)]
-
-        for i in range(data_width):
-            dut = BitSlip(data_width)
-            dut.bitslip = i
-            dut.i_sequence = sequence
-            run_simulation(dut, main_generator(dut))
-
-            model = BitSlipModel(data_width, 4)
-            m_sequence = model.simulate(i, sequence)
-
-            self.assertEqual(dut.o_sequence, m_sequence[:len(dut.o_sequence)])
-
-    def test_bitslip_4b(self):
-        self.bitslip_test(4)
-
-    def test_bitslip_8b(self):
-        self.bitslip_test(8)
-
-    def test_bitslip_16b(self):
-        self.bitslip_test(16)
-
-    def test_bitslip_32b(self):
-        self.bitslip_test(32)
-
-    def test_bitslip_64b(self):
-        self.bitslip_test(64)
-
-    def test_bitslip_128b(self):
-        self.bitslip_test(128)