yosys/tests/ecp5/fsm.ys

read_verilog fsm.v
hierarchy -top top
proc
flatten
#ERROR: Found 4 unproven $equiv cells in 'equiv_status -assert'.
#equiv_opt -assert -map +/ecp5/cells_sim.v synth_ecp5 # equivalency check
equiv_opt -map +/ecp5/cells_sim.v synth_ecp5 # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:L6MUX21
select -assert-count 15 t:LUT4
select -assert-count 6 t:PFUMX
select -assert-count 6 t:TRELLIS_FF
select -assert-none t:L6MUX21 t:LUT4 t:PFUMX t:TRELLIS_FF %% t:* %D