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Add the $anyinit cell and the formalff pass

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These can be used to protect undefined flip-flop initialization values
from optimizations that are not sound for formal verification and can
help mapping all solver-provided values in witness traces for flows that
use different backends simultaneously.
This commit is contained in:
Jannis Harder 2022-07-21 14:22:15 +02:00
parent c26b2bf543
commit c0063288d6
16 changed files with 271 additions and 8 deletions
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6
kernel/celltypes.h
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@ -51,6 +51,7 @@ struct CellTypes
setup_internals();
setup_internals_mem();
setup_internals_anyinit();
setup_stdcells();
setup_stdcells_mem();
}
@ -155,6 +156,11 @@ struct CellTypes
setup_type(ID($dlatchsr), {ID::EN, ID::SET, ID::CLR, ID::D}, {ID::Q});
}
void setup_internals_anyinit()
{
setup_type(ID($anyinit), {ID::D}, {ID::Q});
}
void setup_internals_mem()
{
setup_internals_ff();