verilator/test_regress/t/t_interface_array_nocolon.v

// DESCRIPTION: Verilator: Functionally demonstrate an array of interfaces
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2017 Mike Popoloski
// SPDX-License-Identifier: CC0-1.0

interface foo_intf (
    input x
);
endinterface

module foo_subm (
    input x
);
endmodule

module t;

  localparam N = 3;

  wire [2:0] X = 3'b110;

  // Should not cause ASCRANGE warning, as no harm in array selections.
  // verilator lint_on ASCRANGE
  foo_intf foo1[N] (.x(1'b1));
  foo_subm sub1[N] (.x(1'b1));

  // Will cause ASCRANGE warning?
  // verilator lint_off ASCRANGE
  foo_intf foos[N] (.x(X));
  foo_intf fool[1:3] (.x(X));
  foo_intf foom[3:1] (.x(X));

  foo_subm subs[N] (.x(X));
  foo_subm subl[1:3] (.x(X));
  foo_subm subm[3:1] (.x(X));

  initial begin
    // Check numbering with 0 first
    // NC has a bug here
    if (foos[0].x !== 1'b1) $stop;
    if (foos[1].x !== 1'b1) $stop;
    if (foos[2].x !== 1'b0) $stop;
    //
    if (fool[1].x !== 1'b1) $stop;
    if (fool[2].x !== 1'b1) $stop;
    if (fool[3].x !== 1'b0) $stop;
    //
    if (foom[1].x !== 1'b0) $stop;
    if (foom[2].x !== 1'b1) $stop;
    if (foom[3].x !== 1'b1) $stop;
    //
    if (subs[0].x !== 1'b1) $stop;
    if (subs[1].x !== 1'b1) $stop;
    if (subs[2].x !== 1'b0) $stop;
    //
    if (subl[1].x !== 1'b1) $stop;
    if (subl[2].x !== 1'b1) $stop;
    if (subl[3].x !== 1'b0) $stop;
    //
    if (subm[1].x !== 1'b0) $stop;
    if (subm[2].x !== 1'b1) $stop;
    if (subm[3].x !== 1'b1) $stop;
    //
    $write("*-* All Finished *-*\n");
    $finish;
  end
endmodule