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