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https://github.com/YosysHQ/yosys
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99 lines
2.9 KiB
Text
99 lines
2.9 KiB
Text
read_verilog -icells <<EOT
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module top(input C, D, E, S, R, output [11:0] Q);
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$_DFF_P_ ff0 (.C(C), .D(D), .Q(Q[0]));
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$_DFF_PP0_ ff1 (.C(C), .D(D), .R(R), .Q(Q[1]));
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$_DFF_PP1_ ff2 (.C(C), .D(D), .R(R), .Q(Q[2]));
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$_DFFSR_PPP_ ff3 (.C(C), .D(D), .R(R), .S(S), .Q(Q[3]));
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$_DFFSR_NNN_ ff4 (.C(C), .D(D), .R(R), .S(S), .Q(Q[4]));
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$_DFFE_PP_ ff5 (.C(C), .D(D), .E(E), .Q(Q[5]));
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assign Q[11:6] = ~Q[5:0];
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endmodule
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EOT
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simplemap
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design -save orig
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read_liberty -lib dfflibmap.lib
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equiv_opt -map dfflibmap-sim.v -assert -multiclock dfflibmap -liberty dfflibmap.lib
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equiv_opt -map dfflibmap-sim.v -assert -multiclock dfflibmap -prepare -liberty dfflibmap.lib
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dfflibmap -prepare -liberty dffl*bmap.lib
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equiv_opt -map dfflibmap-sim.v -assert -multiclock dfflibmap -map-only -liberty dfflibmap.lib
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design -load orig
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dfflibmap -liberty dfflibmap.lib
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clean
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select -assert-count 5 t:$_NOT_
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select -assert-count 1 t:dffn
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select -assert-count 4 t:dffsr
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select -assert-count 1 t:dffe
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select -assert-none t:dffn t:dffsr t:dffe t:$_NOT_ %% %n t:* %i
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design -load orig
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dfflibmap -prepare -liberty dfflibmap.lib
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select -assert-count 11 t:$_NOT_
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select -assert-count 1 t:$_DFF_N_
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select -assert-count 4 t:$_DFFSR_PPP_
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select -assert-count 1 t:$_DFFE_NP_
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select -assert-none t:$_DFF_N_ t:$_DFFSR_PPP_ t:$_DFFE_NP_ t:$_NOT_ %% %n t:* %i
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design -load orig
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dfflibmap -map-only -liberty dfflibmap.lib
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select -assert-count 6 t:$_NOT_
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select -assert-count 0 t:dffn
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select -assert-count 1 t:dffsr
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design -load orig
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dfflibmap -prepare -liberty dfflibmap.lib
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dfflibmap -map-only -liberty dfflibmap.lib
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clean
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select -assert-count 5 t:$_NOT_
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select -assert-count 1 t:dffn
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select -assert-count 4 t:dffsr
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select -assert-count 1 t:dffe
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select -assert-none t:dffn t:dffsr t:dffe t:$_NOT_ %% %n t:* %i
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design -load orig
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dfflibmap -prepare -liberty dfflibmap_dffn_dffe.lib -liberty dfflibmap_dffsr.lib
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dfflibmap -map-only -liberty dfflibmap_dffn_dffe.lib -liberty dfflibmap_dffsr.lib
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clean
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select -assert-count 5 t:$_NOT_
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select -assert-count 1 t:dffn
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select -assert-count 1 t:dffe
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select -assert-count 4 t:dffsr
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select -assert-none t:dffn t:dffsr t:dffe t:$_NOT_ %% %n t:* %i
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design -load orig
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dfflibmap -liberty dfflibmap.lib -dont_use *ffn
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clean
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select -assert-count 0 t:dffn
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select -assert-count 5 t:dffsr
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select -assert-count 1 t:dffe
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design -load orig
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dfflibmap -liberty dfflibmap.lib -liberty dfflibmap_dffsr_mixedpol.lib -dont_use dffsr
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clean
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# We have one more _NOT_ than with the regular dffsr
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select -assert-count 6 t:$_NOT_
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select -assert-count 1 t:dffn
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select -assert-count 4 t:dffsr_mixedpol
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select -assert-count 1 t:dffe
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# The additional NOT is on ff2.
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# Originally, ff2.R is an active high "set".
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# dffsr_mixedpol has functionally swapped labels due to the next_state inversion,
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# so we use its CLEAR port for the "set",
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# but we have to invert it because the CLEAR pin is active low.
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# ff2.CLEAR = !R
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select -assert-count 1 c:ff2 %x:+[CLEAR] %ci t:$_NOT_ %i
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