litex/test/test_reduce.py

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#
# This file is part of LiteX.
#
# Copyright (c) 2022 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
import unittest
import random
from migen import *
from litex.gen import *
class TestReduce(unittest.TestCase):
def reduce_test(self, operator, value, reduced):
class DUT(Module):
def __init__(self):
self.errors = 0
self.reduced = Reduce(operator, value)
def checker(self):
yield
if (yield self.reduced) != reduced:
self.errors += 1
dut = DUT()
run_simulation(dut, [dut.checker()])
self.assertEqual(dut.errors, 0)
def test_reduced_and(self):
self.reduce_test(operator="AND", value=Constant(0b00, 2), reduced=0b0)
self.reduce_test(operator="AND", value=Constant(0b01, 2), reduced=0b0)
self.reduce_test(operator="AND", value=Constant(0b10, 2), reduced=0b0)
self.reduce_test(operator="AND", value=Constant(0b11, 2), reduced=0b1)
def test_reduced_or(self):
self.reduce_test(operator="OR", value=Constant(0b00, 2), reduced=0b0)
self.reduce_test(operator="OR", value=Constant(0b01, 2), reduced=0b1)
self.reduce_test(operator="OR", value=Constant(0b10, 2), reduced=0b1)
self.reduce_test(operator="OR", value=Constant(0b11, 2), reduced=0b1)
def test_reduced_nor(self):
self.reduce_test(operator="NOR", value=Constant(0b00, 2), reduced=0b1)
self.reduce_test(operator="NOR", value=Constant(0b01, 2), reduced=0b0)
self.reduce_test(operator="NOR", value=Constant(0b10, 2), reduced=0b0)
self.reduce_test(operator="NOR", value=Constant(0b11, 2), reduced=0b0)
def test_reduced_nor(self):
self.reduce_test(operator="XOR", value=Constant(0b00, 2), reduced=0b0)
self.reduce_test(operator="XOR", value=Constant(0b01, 2), reduced=0b1)
self.reduce_test(operator="XOR", value=Constant(0b10, 2), reduced=0b1)
self.reduce_test(operator="XOR", value=Constant(0b11, 2), reduced=0b0)
2022-10-28 13:13:27 -04:00
def test_reduced_add(self):
self.reduce_test(operator="ADD", value=Constant(0b000, 3), reduced=0)
self.reduce_test(operator="ADD", value=Constant(0b001, 3), reduced=1)
self.reduce_test(operator="ADD", value=Constant(0b010, 3), reduced=1)
self.reduce_test(operator="ADD", value=Constant(0b100, 3), reduced=1)
self.reduce_test(operator="ADD", value=Constant(0b011, 3), reduced=2)
self.reduce_test(operator="ADD", value=Constant(0b110, 3), reduced=2)
self.reduce_test(operator="ADD", value=Constant(0b111, 3), reduced=3)