import unittest from migen import * from migen.test.support import SimCase class SignedCase(SimCase, unittest.TestCase): class TestBench(Module): def __init__(self): self.a = Signal((3, True)) self.b = Signal((4, True)) comps = [ lambda p, q: p > q, lambda p, q: p >= q, lambda p, q: p < q, lambda p, q: p <= q, lambda p, q: p == q, lambda p, q: p != q, ] self.vals = [] for asign in 1, -1: for bsign in 1, -1: for f in comps: r = Signal() r0 = f(asign*self.a, bsign*self.b) self.comb += r.eq(r0) self.vals.append((asign, bsign, f, r, r0.op)) def test_comparisons(self): def gen(): for i in range(-4, 4): yield self.tb.a, i yield self.tb.b, i a = yield self.tb.a b = yield self.tb.b for asign, bsign, f, r, op in self.tb.vals: r, r0 = (yield r), f(asign*a, bsign*b) self.assertEqual(r, int(r0), "got {}, want {}*{} {} {}*{} = {}".format( r, asign, a, op, bsign, b, r0)) yield self.run_with(gen())