equiv_struct - structural equivalence checking¶
yosys> help equiv_struct¶
equiv_struct [options] [selection]
This command adds additional $equiv cells based on the assumption that the gold and gate circuit are structurally equivalent. Note that this can introduce bad $equiv cells in cases where the netlists are not structurally equivalent, for example when analyzing circuits with cells with commutative inputs. This command will also de-duplicate gates.
by default this command performans forward sweeps until nothing can be merged by forwards sweeps, then backward sweeps until forward sweeps are effective again. with this option set only forward sweeps are performed.
add the specified cell type to the list of cell types that are only merged in forward sweeps and never in backward sweeps. $equiv is in this list automatically.
by default, the internal RTL and gate cell types are ignored. add this option to also process those cell types with this command.
maximum number of iterations to run before aborting