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yosys/tests/ice40/dffs.ys
2019-08-21 21:52:07 +03:00

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read_verilog dffs.v
proc
flatten
dff2dffe
hierarchy -top top
synth -flatten -run coarse # technology-independent coarse grained synthesis
equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
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:SB_DFF
select -assert-none t:SB_DFF %% t:* %D