read_verilog ../common/tribuf.v
hierarchy -top tristate
proc
tribuf
flatten
synth
equiv_opt -assert -map +/gowin/cells_sim.v -map +/simcells.v synth_gowin # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd tristate # Constrain all select calls below inside the top module
#Internal cell type used. Need support it.
select -assert-count 1 t:TBUF
select -assert-count 2 t:IBUF
select -assert-none t:TBUF t:IBUF %% t:* %D