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Map to $_FF_ instead of $_DFF_P_ to prevent recursion issues

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This commit is contained in:
Eddie Hung 2019-06-15 09:34:48 -07:00
parent 7a3c403ba0
commit ac18a76beb
3 changed files with 15 additions and 15 deletions
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2
techlibs/xilinx/ff_map.v
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@ -29,7 +29,7 @@ module \$_DFF_P_ (input D, C, output Q);
`else
wire Q_next;
\$__ABC_FDRE #(/*.INIT(|0)*/) _TECHMAP_REPLACE_ (.D(D), .Q(Q_next), .Q_past(Q), .C(C), .CE(1'b1), .R(1'b0));
\$_DFF_P_ abc_dff (.D(Q_next), .Q(Q), .C(C));
\$_FF_ abc_dff (.D(Q_next), .Q(Q));
`endif
endmodule

2
techlibs/xilinx/synth_xilinx.cc
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@ -277,7 +277,7 @@ struct SynthXilinxPass : public ScriptPass
if (check_label("map_cells")) {
run("techmap -map +/techmap.v -map +/xilinx/cells_map.v");
if (abc == "abc9")
run("techmap -max_iter 1 -D _ABC -map +/xilinx/ff_map.v");
run("techmap -D _ABC -map +/xilinx/ff_map.v t:$_DFF*");
run("clean");
}