Some tests for double-packed convs failing

[maltanar]

While testing the new PR #9 I noticed that the following tests are failing (seemingly not related to the PR):

FAILED tests/fpgadataflow/test_fpgadataflow_conv_dsp.py::test_fpgadataflow_packed_dsp[cppsim-32-odt0-tdt0-idt0-wdt0-3-2-5-64-3] - AssertionError: cppsim failed
FAILED tests/fpgadataflow/test_fpgadataflow_conv_dsp.py::test_fpgadataflow_packed_dsp[cppsim-32-odt0-tdt0-idt0-wdt1-3-2-5-64-3] - AssertionError: cppsim failed
FAILED tests/fpgadataflow/test_fpgadataflow_conv_dsp.py::test_fpgadataflow_packed_dsp[cppsim-224-odt0-tdt0-idt0-wdt0-3-2-5-64-3] - FileNotFoundError: [Errno 2] No such file or direct...
FAILED tests/fpgadataflow/test_fpgadataflow_conv_dsp.py::test_fpgadataflow_packed_dsp[cppsim-224-odt0-tdt0-idt0-wdt1-3-2-5-64-3]

I haven't looked at this at any depth but it seems the combination of kernel size (5) and stride (2) with other params is causing this failure, as the tests for other tests (including the case that corresponds to the ResNet-50 first layer) pass.