yosys/tests/arch/xilinx/add_sub.ys

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read_verilog ../common/add_sub.v
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hierarchy -top top
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proc
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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 top # Constrain all select calls below inside the top module
select -assert-count 14 t:LUT2
select -assert-count 6 t:MUXCY
select -assert-count 8 t:XORCY
select -assert-none t:LUT2 t:MUXCY t:XORCY %% t:* %D