[tasks] diode direct [options] mode prove diode: expect pass direct: expect fail fst on [engines] smtbmc [script] diode: read -define USE_DIODE verific -sv data_diode.sv hierarchy -top top # $overwrite_tag currently requires these two passes directly after importing # the design. Otherwise the target signals of $overwrite_tag cannot be properly # resolved nor can `dft_tag -overwrite-only` itself detect this situation to # report it as an error. flatten dft_tag -overwrite-only # Then the design can be prepared as usual prep # And finally the tagging logic can be resolved, which requires converting all # FFs into simple D-FFs. Here, if this isn't done `dft_tag` will produce # warnings and tell you to run the required passes. async2sync dffunmap dft_tag -tag-public # The `Unhandled cell` warnings produced by `dft_tag` mean that there is no # bit-precise tag propagation model for the listed cell. The cell in question # will still propagate tags, but `dft_tag` will use a generic model that # assumes all inputs can propagate to all outputs independent of the value of # other inputs on the same cell. For built-in logic cells this is a sound # over-approximation, but may produce more false-positives than a bit-precise # approximation would. [files] data_diode.sv