yosys/tests/arch/xilinx/mul.ys

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read_verilog ../common/mul.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
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select -assert-count 1 t:DSP48E1
select -assert-none t:DSP48E1 t:IBUF t:OBUF %% t:* %D