yosys/tests/techmap/dfflegalize_dlatch_const.ys

read_verilog -icells <<EOT

module dlatch(input E, D, (* init = 8'hf0 *) output [7:0] Q);
$_DLATCH_P_ ff0 (.E(E), .D(1'b0), .Q(Q[0]));
$_DLATCH_N_ ff1 (.E(E), .D(1'b0), .Q(Q[1]));
$_DLATCH_P_ ff2 (.E(E), .D(1'b1), .Q(Q[2]));
$_DLATCH_N_ ff3 (.E(E), .D(1'b1), .Q(Q[3]));
$_DLATCH_P_ ff4 (.E(E), .D(1'b0), .Q(Q[4]));
$_DLATCH_N_ ff5 (.E(E), .D(1'b0), .Q(Q[5]));
$_DLATCH_P_ ff6 (.E(E), .D(1'b1), .Q(Q[6]));
$_DLATCH_N_ ff7 (.E(E), .D(1'b1), .Q(Q[7]));
endmodule

EOT

design -save orig
equiv_opt -assert -multiclock dfflegalize -cell $_DFF_PP0_ 01
equiv_opt -assert -multiclock dfflegalize -cell $_DFF_PP?_ 0
equiv_opt -assert -multiclock dfflegalize -cell $_DFFSRE_PPPP_ 0
equiv_opt -assert -multiclock dfflegalize -cell $_DFFSRE_PPPP_ 1

# Convert everything to ADFFs.

design -load orig
dfflegalize -cell $_DFF_PP0_ 01

select -assert-count 8 t:$_NOT_
select -assert-count 8 t:$_DFF_PP0_
select -assert-none t:$_DFF_PP0_ t:$_NOT_ %% %n t:* %i

design -load orig
dfflegalize -cell $_DFF_PP?_ 0

select -assert-count 8 t:$_NOT_
select -assert-count 4 t:$_DFF_PP0_
select -assert-count 4 t:$_DFF_PP1_
select -assert-none t:$_DFF_PP0_ t:$_DFF_PP1_ t:$_NOT_ %% %n t:* %i

# Convert everything to DFFSREs.

design -load orig
dfflegalize -cell $_DFFSRE_PPPP_ 0

select -assert-count 8 t:$_NOT_
select -assert-count 8 t:$_DFFSRE_PPPP_
select -assert-none t:$_DFFSRE_PPPP_ t:$_NOT_ %% %n t:* %i

design -load orig
dfflegalize -cell $_DFFSRE_PPPP_ 1

select -assert-count 8 t:$_NOT_
select -assert-count 8 t:$_DFFSRE_PPPP_
select -assert-none t:$_DFFSRE_PPPP_ t:$_NOT_ %% %n t:* %i