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abc9: preserve $_DFF_?_.Q's (* init *); rely on clean to remove it

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This commit is contained in:
Eddie Hung 2020-05-14 00:29:45 -07:00
parent fa31e84112
commit 13f9d65b6f
4 changed files with 13 additions and 25 deletions
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4
techlibs/common/abc9_map.v
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@ -3,14 +3,14 @@
module $_DFF_x_(input C, D, output Q);
parameter [0:0] _TECHMAP_WIREINIT_Q_ = 1'bx;
parameter _TECHMAP_CELLTYPE_ = "";
(* init=_TECHMAP_WIREINIT_Q_ *) wire D_;
wire D_;
generate if (_TECHMAP_CELLTYPE_ == "$_DFF_N_") begin
if (_TECHMAP_WIREINIT_Q_ === 1'b0) begin
$__DFF_N__$abc9_flop _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q), .n1(D_));
$_DFF_N_ ff (.C(C), .D(D_), .Q(Q));
end
else
$__DFF_N_ _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q));// hide from abc9 using $__ prefix
$__DFF_N_ _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q)); // hide from abc9 using $__ prefix
end
else if (_TECHMAP_CELLTYPE_ == "$_DFF_P_") begin
if (_TECHMAP_WIREINIT_Q_ === 1'b0) begin