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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 10:33:57 -07:00
parent fa31e84112
commit 13f9d65b6f
4 changed files with 13 additions and 25 deletions
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techlibs/common/abc9_map.v
+2 -2
View File
@@ -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
techlibs/common/abc9_unmap.v
+2 -3
View File
@@ -1,6 +1,5 @@
(* techmap_celltype = "$__DFF_N__$abc9_flop $__DFF_P__$abc9_flop" *)
module $__DFF_x__$abc9_flop (input C, D, Q, (* init = INIT *) output n1);
parameter [0:0] INIT = 1'bx;
module $__DFF_x__$abc9_flop (input C, D, Q, output n1);
parameter _TECHMAP_CELLTYPE_ = "";
generate if (_TECHMAP_CELLTYPE_ == "$__DFF_N__$abc9_flop")
$_DFF_N_ _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q));
@@ -12,7 +11,7 @@ module $__DFF_x__$abc9_flop (input C, D, Q, (* init = INIT *) output n1);
endmodule
(* techmap_celltype = "$__DFF_N_ $__DFF_P_" *)
module $__DFF_N__$abc9_flop (input C, D, output Q);
module $__DFF_x_ (input C, D, output Q);
parameter _TECHMAP_CELLTYPE_ = "";
generate if (_TECHMAP_CELLTYPE_ == "$__DFF_N_")
$_DFF_N_ _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q));