// Copyright (C) 2019-2022 The SymbiFlow Authors
//
// Use of this source code is governed by a ISC-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/ISC
//
// SPDX-License-Identifier: ISC

(* keep_hierarchy *)
module my_lut (
    input  wire [3:0] i,
    output wire       o
);

  LUT4 #(
      .INIT(16'hAAAA)
  ) my_lut (
      .I0(i[0]),
      .I1(i[1]),
      .I2(i[2]),
      .I3(1'bx),
      .O (o)
  );

endmodule

module my_top (
    input  wire i,
    output wire o
);

  my_lut my_lut (
      .i({1'b0, 1'b1, i}),
      .o(o)
  );

endmodule