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abc9: not enough to techmap_fail on (* init=1 *), hide them using $__

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This commit is contained in:
Eddie Hung 2020-04-16 12:08:59 -07:00
parent 5ad3a85288
commit 722540dbf9
4 changed files with 48 additions and 12 deletions
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24
techlibs/common/abc9_map.v
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@ -2,20 +2,24 @@
module $_DFF_x_(input C, D, output Q);
parameter [0:0] _TECHMAP_WIREINIT_Q_ = 1'bx;
parameter _TECHMAP_CELLTYPE_ = "";
generate if (_TECHMAP_WIREINIT_Q_ === 1'b1)
wire _TECHMAP_FAIL_ = 1;
else if (_TECHMAP_CELLTYPE_ == "$_DFF_N_") begin
wire D_;
$__DFF_N__$abc9_flop #(.INIT(_TECHMAP_WIREINIT_Q_)) _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q), .n1(D_));
$_DFF_N_ ff (.C(C), .D(D_), .Q(Q));
wire D_;
generate if (_TECHMAP_CELLTYPE_ == "$_DFF_N_") begin
if (_TECHMAP_WIREINIT_Q_ === 1'b0) begin
$__DFF_N__$abc9_flop #(.INIT(_TECHMAP_WIREINIT_Q_)) _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 $__ prefix
end
else if (_TECHMAP_CELLTYPE_ == "$_DFF_P_") begin
wire D_;
$__DFF_P__$abc9_flop #(.INIT(_TECHMAP_WIREINIT_Q_)) _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q), .n1(D_));
$_DFF_P_ ff (.C(C), .D(D_), .Q(Q));
if (_TECHMAP_WIREINIT_Q_ === 1'b0) begin
$__DFF_P__$abc9_flop #(.INIT(_TECHMAP_WIREINIT_Q_)) _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q), .n1(D_));
$_DFF_P_ ff (.C(C), .D(D_), .Q(Q));
end
else
$__DFF_P_ _TECHMAP_REPLACE_ (.C(C), .D(D), .Q(Q)); // hide from abc9 using $__ prefix
end
else if (_TECHMAP_CELLTYPE_ != "")
$error("Unrecognised _TECHMAP_CELLTYPE_");
endgenerate
wire _TECHMAP_REMOVEINIT_Q_ = 1;
endmodule