示例#1
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def test_sseq2tseq3_0_bank_addr_generator():
    width = 11
    T = Array[width, BitIn]
    sseq_dim = 2
    tseq_dim = 3
    lcm_dim = lcm(sseq_dim, tseq_dim)
    st_flat_idxs = st_lens_to_vals(sseq_dim, tseq_dim)
    # transpose the st_flat_idxs so inner array is on same clock
    flat_idxs_inner_per_clock = [[st_flat_idxs[s][t] for s in range(sseq_dim)] for t in range(tseq_dim)]
    # banks and addr should write to each clock
    banks_per_clock = [[((flat_idx % sseq_dim) + (flat_idx // lcm_dim)) % sseq_dim for flat_idx in flat_idxs_one_clock] for flat_idxs_one_clock in flat_idxs_inner_per_clock]
    addr_per_clock = [[flat_idx // sseq_dim for flat_idx in flat_idxs_one_clock] for flat_idxs_one_clock in flat_idxs_inner_per_clock]

    testcircuit = DefineSTBankAddrGenerator(sseq_dim, tseq_dim, 0, 1)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    for t in range(tseq_dim):
        tester.eval()
        for s in range(sseq_dim):
            tester.circuit.bank.expect(banks_per_clock[t][s])
            tester.circuit.addr.expect(addr_per_clock[t][s])
        tester.step(2)

    compile_and_run(tester)
示例#2
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def test_up_t_invalids_v_delated_true_ce():
    iterations = 2
    delay = 5
    num_out = 4
    invalids = 2
    test_val = 3
    elem_t = ST_Int()

    up = DefineUp_T(num_out, invalids, elem_t, has_ce=True, has_valid=True)

    tester = fault.Tester(up, up.CLK)

    tester.circuit.valid_up = 0
    tester.circuit.CE = 1
    tester.circuit.I = test_val + 4
    for i in range(delay):
        tester.step(2)
    tester.circuit.valid_up = 1
    for i in range(iterations):
        for j in range(num_out + invalids):
            if j == 0:
                tester.circuit.I = test_val + i
            else:
                tester.circuit.I = test_val + 4
            tester.eval()
            if j < num_out:
                tester.circuit.O.expect(test_val + i)
            tester.circuit.valid_down.expect(1)
            tester.step(2)
    compile_and_run(tester)
示例#3
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def test_fifo_basic_1_clock():
    num_in = 4
    num_iterations = 2
    test_vals = [2,4,6,8,1,3,5,9]
    delay_amount = 1
    in_type = ST_TSeq(num_in, 0, ST_Int())

    rshift = DefineFIFO(in_type, delay_amount, has_valid=True)

    tester = fault.Tester(rshift, rshift.CLK)

    tester.circuit.valid_up = 1
    input_counter = 0
    output_counter = 0
    for i in range(num_iterations):
        for j in range(num_in):
            tester.print("clk: {}\n".format(i*num_iterations + j))
            tester.circuit.I = test_vals[input_counter]
            tester.eval()
            if i == 0 and j < delay_amount:
                tester.circuit.valid_down.expect(0)
            else:
                tester.circuit.valid_down.expect(1)
                tester.circuit.O.expect(test_vals[output_counter])
                output_counter = min(output_counter + 1, len(test_vals))
            input_counter = min(input_counter + 1, len(test_vals))
            tester.step(2)
    tester.circuit.valid_down.expect(1)
    compile_and_run(tester)
示例#4
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def test_serialize_multiple_clocks():
    no = 2
    io = 0
    ni = 2
    ii = 1
    inputs = [[1, 2], [3, 4]]
    wrong_inputs = [5, 6]
    outputs = [1, 3, 2, 4]
    num_iterations = 2
    t = ST_TSeq(ni, ii, ST_Int())

    ser = DefineSerialize(no, io, t)

    tester = fault.Tester(ser, ser.CLK)

    tester.circuit.valid_up = 1
    output_counter = 0
    for clk in range(num_iterations * (no + io) * t.time()):
        if clk % ((no + io) * (ni + ii)) < ni:
            tester.circuit.I = inputs[clk % (no + io)]
        else:
            tester.circuit.I = wrong_inputs
        tester.print("clk: {}\n".format(clk))
        tester.step(2)
        tester.circuit.valid_down.expect(1)
        if clk in [0, 1, 3, 4, 6, 7, 9, 10]:
            tester.circuit.O.expect(outputs[output_counter])
            output_counter += 1
            output_counter = output_counter % 4
    compile_and_run(tester)
示例#5
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def test_ram_st_TSeq_3_1():
    n = 3
    i = 1
    t = ST_TSeq(n, i, ST_Int())
    num = 2
    testcircuit = DefineRAM_ST(t, num)
    tester = fault.Tester(testcircuit, testcircuit.CLK)

    valid_clocks = [(o < n) for o in range(n + i)]

    tester.circuit.WE = True
    tester.circuit.RE = True
    clk = 0
    for k in range(2):
        for j in range(n + i):
            tester.print("clk: {}\n".format(clk))
            tester.circuit.WADDR = k
            tester.circuit.RADDR = k - 1
            tester.circuit.WDATA = j + k * (n + i)
            tester.eval()
            if k == 1 and valid_clocks[j]:
                tester.circuit.RDATA.expect(j)
            tester.step(2)
            clk += 1
    compile_and_run(tester)
def test_bitonic_merge_8_elem():
    width = 11

    T = Array[width, BitIn]

    testcircuit = DefineBitonicMergePow2(T, 8, lambda x: x, 0)

    tester = fault.Tester(testcircuit)

    inputs = [0, 2, 5, 7, 6, 4, 3, 1]
    tester.circuit.I[0] = inputs[0]
    tester.circuit.I[1] = inputs[1]
    tester.circuit.I[2] = inputs[2]
    tester.circuit.I[3] = inputs[3]
    tester.circuit.I[4] = inputs[4]
    tester.circuit.I[5] = inputs[5]
    tester.circuit.I[6] = inputs[6]
    tester.circuit.I[7] = inputs[7]
    tester.eval()
    tester.circuit.O[0].expect(inputs[0])
    tester.circuit.O[1].expect(inputs[7])
    tester.circuit.O[2].expect(inputs[1])
    tester.circuit.O[3].expect(inputs[6])
    tester.circuit.O[4].expect(inputs[5])
    tester.circuit.O[5].expect(inputs[2])
    tester.circuit.O[6].expect(inputs[4])
    tester.circuit.O[7].expect(inputs[3])
    compile_and_run(tester)
示例#7
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def test_shift_ts():
    no = 2
    io = 0
    ni = 4
    test_vals = [[0, 1, 2, 3], [4, 5, 6, 7]]
    shifted_test_vals = [[int_to_ignore, int_to_ignore, 0, 1], [2, 3, 4, 5]]
    shift_amount = 2
    in_type = ST_TSeq(no, io, ST_SSeq(ni, ST_Int()))

    rshift = DefineShift_TS(no,
                            io,
                            ni,
                            shift_amount,
                            in_type.t.t,
                            has_valid=True)

    tester = fault.Tester(rshift, rshift.CLK)

    tester.circuit.valid_up = 1
    for clk in range(len(test_vals)):
        tester.print("clk: {}".format(clk))
        set_nested_port(tester, tester.circuit.I, test_vals[clk], 1, 0)
        print_nested_port(tester, tester.circuit.I, 1)
        tester.print("\n")
        tester.eval()
        #for i, val in enumerate(test_vals[i*ni+shift_amount:(i+1)*ni+shift_amount]):
        print_nested_port(tester, tester.circuit.O, 1)
        tester.print("\n")
        expect_nested_port(tester, tester.circuit.O, shifted_test_vals[clk], 1,
                           0)
        tester.circuit.valid_down.expect(1)
        tester.step(2)
    compile_and_run(tester)
示例#8
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def check_ram_st(clocks, num_t, tester, valid_clocks, ints_per_clock):
    tester.circuit.WE = True
    tester.circuit.RE = True
    clk = 0
    for k in range(num_t):
        for j in range(clocks):
            tester.print("clk: {}\n".format(clk))
            # tester.print("last: %d\n", tester.circuit.last)
            #tester.print("inner read counter: %d\n", tester.circuit.ir)
            #tester.print("inner write counter: %d\n", tester.circuit.iw)
            tester.circuit.WADDR = k
            tester.circuit.RADDR = k - 1
            if ints_per_clock is not None:
                tester.circuit.WDATA = [
                    ints_per_clock * (j + k * clocks) + i
                    for i in range(ints_per_clock)
                ]
            else:
                tester.circuit.WDATA = j + k * clocks
            tester.eval()
            if k > 0 and valid_clocks[j]:
                if ints_per_clock is not None:
                    tester.circuit.RDATA.expect([
                        ints_per_clock * (j + (k - 1) * clocks) + i
                        for i in range(ints_per_clock)
                    ])
                else:
                    tester.circuit.RDATA.expect(j + (k - 1) * clocks)
            tester.step(2)
            clk += 1
    compile_and_run(tester)
示例#9
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def test_shift_tn_v_always_true_no_ce():
    num_in = [3, 2, 2]
    test_vals = [i * 2 for i in range(num_in[0] * num_in[1] * num_in[2])]
    shift_amount = 1
    in_type = ST_TSeq(num_in[0], 0,
                      ST_TSeq(num_in[1], 0, ST_TSeq(num_in[2], 0, ST_Int())))
    num_clocks_per_iteration = len(test_vals)
    num_iterations = 2

    testcircuit = DefineShift_TN(in_type.n, (2, 2),
                                 in_type.i, (0, 0),
                                 shift_amount,
                                 ST_Int(),
                                 has_valid=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.valid_up = 1
    for i in range(num_iterations):
        for clk in range(num_clocks_per_iteration):
            tester.print("CLK: {}\n".format(clk))
            tester.circuit.I = test_vals[clk] + i
            tester.eval()
            if clk >= shift_amount:
                tester.circuit.O.expect(test_vals[clk - shift_amount] + i)
            tester.circuit.valid_down.expect(1)
            tester.step(2)
    compile_and_run(tester)
示例#10
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def test_shift_t_v_always_true_no_ce():
    num_in = 4
    test_vals = [2, 5, 3, 8]
    shift_amount = 1
    in_type = ST_TSeq(num_in, 0, ST_Int())
    num_clocks_per_iteration = len(test_vals)
    num_iterations = 2

    testcircuit = DefineShift_T(in_type.n,
                                in_type.i,
                                shift_amount,
                                in_type.t,
                                has_valid=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.valid_up = 1
    for i in range(num_iterations):
        for clk in range(num_clocks_per_iteration):
            tester.circuit.I = test_vals[clk] + i
            tester.eval()
            if clk >= shift_amount:
                tester.circuit.O.expect(test_vals[clk - shift_amount] + i)
            tester.circuit.valid_down.expect(1)
            tester.step(2)
    compile_and_run(tester)
示例#11
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def test_shift_t_invalid_v_delayed_true_no_ce():
    delay = 3
    num_in = 5
    test_vals = [2, 5, 3, 8, 10]
    shift_amount = 1
    in_type = ST_TSeq(num_in, 1, ST_Int())
    num_clocks_per_iteration = num_in
    num_iterations = 2

    testcircuit = DefineShift_T(in_type.n,
                                in_type.i,
                                shift_amount,
                                in_type.t,
                                has_valid=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.valid_up = 0
    for i in range(delay):
        tester.step(2)
        tester.circuit.valid_down.expect(0)
    tester.circuit.valid_up = 1
    for i in range(num_iterations):
        for clk in range(num_clocks_per_iteration):
            val_idx = min(clk, len(test_vals) - 1)
            tester.circuit.I = test_vals[val_idx] + i
            tester.eval()
            if clk >= shift_amount:
                tester.circuit.O.expect(test_vals[val_idx - shift_amount] + i)
            tester.circuit.valid_down.expect(1)
            tester.step(2)
    compile_and_run(tester)
示例#12
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def test_term_empty():
    term = DefineTermAnyType(Array[0, Array[8, Bit]])

    tester = fault.Tester(term)

    tester.circuit.valid_up = 1
    if False:
        compile_and_run(tester)
示例#13
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def test_diff_sseq_on_diff_component_of_type():
    # i would need to improve test bench for this to actually be tested
    # just here to verify no errors on wiring. Need to manually check that for now.
    input_type = ST_TSeq(
        4, 0, ST_TSeq(1, 1, ST_TSeq(4, 0, ST_SSeq(1, ST_SSeq(1, ST_Int())))))
    output_type = ST_TSeq(
        4, 4, ST_SSeq(1, ST_TSeq(4, 0, ST_SSeq(1, ST_SSeq(1, ST_Int())))))
    graph = build_permutation_graph(input_type, output_type)
    testcircuit = DefineReshape_ST(input_type, output_type)
    tester = fault.Tester(testcircuit, testcircuit.CLK)
    tester.step(2)
    compile_and_run(tester)
示例#14
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def test_reg_11():
    width = 11
    numOut = 1
    T = Array[width, BitOut]

    testcircuit = DefineRegisterAnyType(T, numOut, has_ce=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)
    tester.circuit.CE = 1
    tester.circuit.I = 2
    tester.step(2)
    tester.circuit.O.expect(2)
    compile_and_run(tester)
示例#15
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def test_mux_int_5():
    n = 5
    T = ST_Int().magma_repr()

    testcircuit = DefineMuxAnyType(T, n)

    tester = fault.Tester(testcircuit)

    for i in range(n):
        tester.circuit.data[i] = i
    tester.circuit.sel = 2
    tester.eval()
    tester.circuit.out.expect(2)
    compile_and_run(tester)
示例#16
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def test_map_merge_rv_ce():
    width = 11
    numIn = 13
    numUp = 5
    T = Array[width, BitIn]

    args = ['I', In(Array[numIn, T]), 'O',
            Out(Array[numIn, T])] + ClockInterface(
                True, True) + ready_valid_interface
    testcircuit = DefineCircuit('Test_Map_Merge', *args)

    ups = DefineNativeMapParallel(numIn,
                                  DefineUpsampleSequential(
                                      numUp, 1, T, True, True),
                                  merge_ready_valid_ce_reset=True)()

    wire(ups.I, testcircuit.I)
    wire(ups.O, testcircuit.O)
    wire(ups.CE, testcircuit.CE)
    wire(ups.RESET, testcircuit.RESET)
    wire(ups.valid_down, testcircuit.valid_down)
    wire(ups.valid_up, testcircuit.valid_up)
    wire(ups.ready_down, testcircuit.ready_down)
    wire(ups.ready_up, testcircuit.ready_up)

    EndCircuit()

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.ready_down = True
    tester.circuit.valid_up = True
    tester.circuit.CE = True
    tester.circuit.RESET = False
    for i in range(numIn):
        tester.circuit.I[i] = i
    for i in range(numUp):
        tester.eval()
        for j in range(numIn):
            tester.circuit.O[j].expect(j)
        #tester.print(f"circuit ready_up: %d\n", testcircuit.ready_up)
        #tester.print(f"first upsample ready_up: %d\n", testcircuit._instances[0]._instances[0].defn.ready_up)
        #tester.print(f"first upsample ready_down: %d\n", testcircuit._instances[0]._instances[0].defn.ready_down)
        #tester.print(f"first upsample valid_up: %d\n", testcircuit._instances[0]._instances[0].defn.valid_up)
        #tester.print(f"first upsample valid_down: %d\n", testcircuit._instances[0]._instances[0].defn.valid_down)
        tester.circuit.ready_up.expect(i == 0)
        tester.circuit.valid_down.expect(True)
        tester.step(2)
        for i in range(numIn):
            tester.circuit.I[i] = 0
    compile_and_run(tester)
示例#17
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def test_ram_1_13():
    width = 11
    numOut = 1
    T = Array[width, BitOut]

    testcircuit = DefineRAMAnyType(T, numOut)

    tester = fault.Tester(testcircuit, testcircuit.CLK)
    tester.circuit.WE = True
    tester.circuit.RADDR = 0
    tester.circuit.WADDR = 0
    tester.circuit.WDATA = 2
    tester.step(2)
    tester.circuit.RDATA.expect(2)
    compile_and_run(tester)
示例#18
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def test_lut_11_13():
    width = 11
    numOut = 13
    T = Array[width, BitOut]
    init = [builtins.tuple(int2seq(i, width)) for i in range(4, numOut + 4)]

    testcircuit = DefineLUTAnyType(T, numOut, builtins.tuple(init))

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    for i in range(numOut):
        tester.circuit.addr = i
        tester.eval()
        tester.circuit.data.expect(i + 4)
    compile_and_run(tester)
示例#19
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def test_down_s():
    num_out = 1
    test_val = 3

    down = DefineDown_S(1, 0, ST_Int(), has_valid=True)

    tester = fault.Tester(down, down.CLK)

    tester.circuit.valid_up = 1
    tester.circuit.I[0] = test_val
    tester.eval()
    for i in range(num_out):
        tester.circuit.O[i].expect(test_val)
    tester.circuit.valid_down.expect(1)
    compile_and_run(tester)
示例#20
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def test_reg_tuple_11_and_12():
    width0 = 11
    width1 = 12
    numOut = 1
    T = Tuple(Array[width0, BitOut], Array[width1, BitOut])

    testcircuit = DefineRegisterAnyType(T, numOut, has_ce=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)
    tester.circuit.CE = 1
    tester.circuit.I[0] = 2
    tester.circuit.I[1] = 3
    tester.step(2)
    tester.circuit.O[0].expect(2)
    tester.circuit.O[1].expect(3)
    compile_and_run(tester)
示例#21
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def test_reg_array_of_array():
    width = 11
    num = 2
    numOut = 1
    T = Array[num, Array[width, BitOut]]

    testcircuit = DefineRegisterAnyType(T, numOut, has_ce=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)
    tester.circuit.CE = 1
    tester.circuit.I[0] = 2
    tester.circuit.I[1] = 3
    tester.step(2)
    tester.circuit.O[0].expect(2)
    tester.circuit.O[1].expect(3)
    compile_and_run(tester)
示例#22
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def test_up_s():
    num_out = 2
    test_val = 3
    elem_t = ST_Int()

    up = DefineUp_S(num_out, elem_t, True)

    tester = fault.Tester(up, up.CLK)

    tester.circuit.valid_up = 1
    tester.circuit.I[0] = test_val
    tester.eval()
    for i in range(num_out):
        tester.circuit.O[i].expect(test_val)
    tester.circuit.valid_down.expect(1)
    compile_and_run(tester)
示例#23
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def test_term():
    width = 11
    T = Array[width, BitIn]

    args = ['I', In(T), 'O', Out(T)]
    testcircuit = DefineCircuit('Test_Term', *args)
    wire(testcircuit.I, testcircuit.O)
    term = TermAnyType(T)
    t_const = DefineCoreirConst(width, 0)()
    wire(t_const.O, term.I)
    EndCircuit()

    tester = fault.Tester(testcircuit)
    tester.circuit.I = 2
    tester.eval()
    tester.circuit.O.expect(2)
    compile_and_run(tester)
示例#24
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def test_ram_11_13():
    width = 11
    numOut = 13
    T = Array[width, BitOut]

    testcircuit = DefineRAMAnyType(T, numOut)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.WE = True
    for i in range(numOut + 1):
        tester.circuit.RADDR = i % numOut
        tester.circuit.WADDR = i % numOut
        tester.circuit.WDATA = i % numOut
        tester.step(2)
        tester.circuit.RDATA.expect(i % numOut)
    compile_and_run(tester)
示例#25
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def test_fault_shift_s():
    num_in = 4
    test_vals = [2, 5, 3, 8]
    shift_amount = 2
    in_type = ST_SSeq(num_in, ST_Int())

    rshift = DefineShift_S(num_in, shift_amount, in_type.t, has_valid=True)

    tester = fault.Tester(rshift, rshift.CLK)

    tester.circuit.valid_up = 1
    for i, val in enumerate(test_vals):
        tester.circuit.I[i] = val
    tester.eval()
    for i, val in enumerate(test_vals[shift_amount:]):
        tester.circuit.O[i + shift_amount].expect(test_vals[i])
    tester.circuit.valid_down.expect(1)
    compile_and_run(tester)
示例#26
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def test_reduce_s_basic():
    num_in = 4
    num_iterations = 2
    test_vals = [2,4,6,8,1,3,5,9]
    outputs = [20,18]
    red = DefineReduce_S(num_in, DefineAdd_Atom(), has_valid=True)

    tester = fault.Tester(red, red.CLK)

    tester.circuit.valid_up = 1
    for i in range(num_iterations):
        tester.print("clk: {}\n".format(i))
        for j in range(num_in):
            tester.circuit.I[j] = test_vals[i*num_in + j]
        tester.step(2)
        tester.circuit.valid_down.expect(1)
        tester.circuit.O[0].expect(outputs[i])
    compile_and_run(tester)
示例#27
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def test_rom_11_13():
    width = 11
    numOut = 13
    T = Array[width, BitOut]
    init = [builtins.tuple(int2seq(i)) for i in range(4, numOut+4)]

    return
    testcircuit = DefineROMAnyType(T, width, builtins.tuple(init))

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.RE = True

    for i in range(numOut):
        tester.circuit.RADDR = i
        tester.step(2)
        tester.circuit.RDATA.expect(i + 4)
    compile_and_run(tester)
示例#28
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def test_shift_tn_inner_invalid_elem_invalid_v_always_true_no_ce():
    num_in = [3, 2, 2]
    test_vals = [i * 2 for i in range(num_in[0] * num_in[1] * num_in[2])]
    shift_amount = 1
    iis = (2, 1)
    num_iterations = 2

    testcircuit = DefineShift_TN(num_in[0], (2, 2),
                                 0,
                                 iis,
                                 shift_amount,
                                 ST_TSeq(1, 2, ST_Int()),
                                 has_valid=True)

    tester = fault.Tester(testcircuit, testcircuit.CLK)

    tester.circuit.valid_up = 1
    for i in range(num_iterations):
        for clk_outer in range(num_in[0]):
            for clk_inner in range(num_in[1] + iis[0]):
                for clk_ii in range(num_in[2] + iis[1]):
                    for clk_innermost in range(0, 3):
                        tester.print("clk_outer: {}\n".format(clk_outer))
                        tester.print("clk_inner: {}\n".format(clk_inner))
                        tester.print("clk_ii: {}\n".format(clk_ii))
                        val_idx = clk_outer * 4 + min(
                            clk_inner, num_in[1] - 1) * 2 + min(
                                clk_ii, num_in[2] - 1)
                        in_val = test_vals[val_idx] + i + (
                            0 if clk_inner < 2 and clk_ii < 2
                            and clk_innermost == 0 else 110)
                        tester.circuit.I = in_val
                        tester.print("I: {}\n".format(str(in_val)))
                        tester.eval()
                        tester.print("O: %d\n", tester.circuit.O)
                        #tester.print("inner_valid: %d\n", tester.circuit.inner_valid)
                        if val_idx >= shift_amount and clk_inner < 2 and clk_ii < 2 and clk_innermost == 0:
                            tester.circuit.O.expect(test_vals[val_idx -
                                                              shift_amount] +
                                                    i)
                        tester.circuit.valid_down.expect(1)
                        tester.step(2)
    compile_and_run(tester)
示例#29
0
def test_up_s_sseq():
    n = 2
    num_out = 2
    test_vals = [3, 5]
    elem_t = ST_SSeq(n, ST_Int())

    up = DefineUp_S(num_out, elem_t, True)

    tester = fault.Tester(up, up.CLK)

    tester.circuit.valid_up = 1
    for i, v in enumerate(test_vals):
        tester.circuit.I[0][i] = v
    tester.eval()
    for i in range(num_out):
        for j, v in enumerate(test_vals):
            tester.circuit.O[i][j].expect(v)
    tester.circuit.valid_down.expect(1)
    compile_and_run(tester)
示例#30
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def test_serialize_basic():
    n = 5
    i = 0
    inputs = list(range(n))
    num_iterations = 2
    t = ST_Int()

    ser = DefineSerialize(n, i, t)

    tester = fault.Tester(ser, ser.CLK)

    tester.circuit.valid_up = 1
    tester.circuit.I = inputs
    for clk in range(num_iterations * (n + i)):
        tester.print("clk: {}\n".format(clk))
        tester.step(2)
        tester.circuit.valid_down.expect(1)
        tester.circuit.O.expect(inputs[clk % n])
    compile_and_run(tester)