read_verilog mul_unsigned.v
hierarchy -top mul_unsigned
proc

equiv_opt -assert -map +/xilinx/cells_sim.v synth_xilinx # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd mul_unsigned # Constrain all select calls below inside the top module
select -assert-count 1 t:BUFG
select -assert-count 1 t:DSP48E1
select -assert-count 30 t:FDRE
select -assert-none t:DSP48E1 t:FDRE t:BUFG %% t:* %D