Add dffunmap pass.

To be used with backends that cannot deal with fancy FF types (like blif
or smt).

1 files changed, 100 insertions, 0 deletions

diff --git a/tests/techmap/dffunmap.ys b/tests/techmap/dffunmap.ys
new file mode 100644
index 000000000..b813078ee
--- /dev/null
+++ b/tests/techmap/dffunmap.ys
@@ -0,0 +1,100 @@
+read_verilog -icells << EOT
+
+module top(...);
+
+input C, R, E, S;
+input [1:0] D;
+output [20:0] Q;
+
+$dff #(.CLK_POLARITY(1'b0), .WIDTH(2)) ff0 (.CLK(C), .D(D), .Q(Q[1:0]));
+$dffe #(.CLK_POLARITY(1'b0), .EN_POLARITY(1'b0), .WIDTH(2)) ff1 (.CLK(C), .EN(E), .D(D), .Q(Q[3:2]));
+$sdff #(.CLK_POLARITY(1'b0), .WIDTH(2), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2)) ff2 (.CLK(C), .SRST(R), .D(D), .Q(Q[5:4]));
+$sdffe #(.CLK_POLARITY(1'b0), .EN_POLARITY(1'b1), .WIDTH(2), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2)) ff3 (.CLK(C), .EN(E), .SRST(R), .D(D), .Q(Q[7:6]));
+$sdffce #(.CLK_POLARITY(1'b0), .EN_POLARITY(1'b1), .WIDTH(2), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2)) ff4 (.CLK(C), .EN(E), .SRST(R), .D(D), .Q(Q[9:8]));
+$adff #(.CLK_POLARITY(1'b0), .WIDTH(2), .ARST_POLARITY(1'b0), .ARST_VALUE(2'h2)) ff5 (.CLK(C), .ARST(R), .D(D), .Q(Q[11:10]));
+$adffe #(.CLK_POLARITY(1'b0), .EN_POLARITY(1'b1), .WIDTH(2), .ARST_POLARITY(1'b1), .ARST_VALUE(2'h2)) ff6 (.CLK(C), .EN(E), .ARST(R), .D(D), .Q(Q[13:12]));
+$dffsr #(.CLK_POLARITY(1'b0), .WIDTH(2), .CLR_POLARITY(1'b0), .SET_POLARITY(1'b1)) ff7 (.CLK(C), .CLR({R, S}), .SET({S, R}), .D(D), .Q(Q[15:14]));
+$dffsre #(.CLK_POLARITY(1'b0), .EN_POLARITY(1'b1), .WIDTH(2), .CLR_POLARITY(1'b1), .SET_POLARITY(1'b0)) ff8 (.CLK(C), .EN(E), .CLR({R, R}), .SET({S, S}), .D(D), .Q(Q[17:16]));
+
+endmodule
+
+EOT
+
+design -save orig
+
+equiv_opt -assert -async2sync dffunmap
+design -load postopt
+select -assert-none t:$sdff t:$dffe t:$adffe t:$sdffe t:$sdffce t:$dffsre
+select -assert-count 5 t:$dff
+select -assert-count 2 t:$adff
+select -assert-count 2 t:$dffsr
+
+design -load orig
+
+equiv_opt -assert -async2sync dffunmap -ce-only
+design -load postopt
+select -assert-none t:$dffe t:$adffe t:$sdffe t:$sdffce t:$dffsre
+select -assert-count 3 t:$dff
+select -assert-count 2 t:$sdff
+select -assert-count 2 t:$adff
+select -assert-count 2 t:$dffsr
+
+design -load orig
+
+equiv_opt -assert -async2sync dffunmap -srst-only
+design -load postopt
+select -assert-none t:$sdff t:$sdffe t:$sdffce
+select -assert-count 3 t:$dff
+select -assert-count 2 t:$dffe
+select -assert-count 1 t:$adff
+select -assert-count 1 t:$adffe
+select -assert-count 1 t:$dffsr
+select -assert-count 1 t:$dffsre
+
+design -load orig
+simplemap
+
+equiv_opt -assert -async2sync dffunmap
+design -load postopt
+select -assert-none t:$_SDFF* t:$_DFFE_* t:$_DFFSRE_*
+select -assert-count 10 t:$_DFF_N_
+select -assert-count 1 t:$_DFF_NP0_
+select -assert-count 1 t:$_DFF_NN0_
+select -assert-count 1 t:$_DFF_NP1_
+select -assert-count 1 t:$_DFF_NN1_
+select -assert-count 2 t:$_DFFSR_NPN_
+select -assert-count 2 t:$_DFFSR_NNP_
+
+design -load orig
+simplemap
+
+equiv_opt -assert -async2sync dffunmap -ce-only
+design -load postopt
+select -assert-none t:$_SDFFE_* t:$_SDFFCE_* t:$_DFFE_* t:$_DFFSRE_*
+select -assert-count 6 t:$_DFF_N_
+select -assert-count 1 t:$_SDFF_NP0_
+select -assert-count 1 t:$_SDFF_NN0_
+select -assert-count 1 t:$_SDFF_NP1_
+select -assert-count 1 t:$_SDFF_NN1_
+select -assert-count 1 t:$_DFF_NP0_
+select -assert-count 1 t:$_DFF_NN0_
+select -assert-count 1 t:$_DFF_NP1_
+select -assert-count 1 t:$_DFF_NN1_
+select -assert-count 2 t:$_DFFSR_NPN_
+select -assert-count 2 t:$_DFFSR_NNP_
+
+design -load orig
+simplemap
+
+equiv_opt -assert -async2sync dffunmap -srst-only
+design -load postopt
+select -assert-none t:$sdff t:$sdffe t:$sdffce
+select -assert-count 6 t:$_DFF_N_
+select -assert-count 2 t:$_DFFE_NP_
+select -assert-count 2 t:$_DFFE_NN_
+select -assert-count 1 t:$_DFF_NN0_
+select -assert-count 1 t:$_DFF_NN1_
+select -assert-count 1 t:$_DFFE_NP0P_
+select -assert-count 1 t:$_DFFE_NP1P_
+select -assert-count 2 t:$_DFFSR_NPN_
+select -assert-count 2 t:$_DFFSRE_NNPP_