verilator/test_regress/t/t_mod_interface_array6.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2021 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

// verilog_format: off
`define stop $stop
`define checkh(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d:  got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0)
// verilog_format: on

interface intf ();
  integer index;
endinterface

module t (
    clk
);
  input clk;

  intf ifa1_intf[4:1] ();
  intf ifa2_intf[4:1] ();
  intf ifb1_intf[1:4] ();
  intf ifb2_intf[1:4] ();

  int cyc;

  sub sub0 (
      .n(0),
      .clk,
      .cyc,
      .alh(ifa1_intf[2:1]),
      .ahl(ifa2_intf[2:1]),
      .blh(ifb1_intf[1:2]),
      .bhl(ifb2_intf[1:2])
  );

  sub sub1 (
      .n(1),
      .clk,
      .cyc,
      .alh(ifa1_intf[4:3]),
      .ahl(ifa2_intf[4:3]),
      .blh(ifb1_intf[3:4]),
      .bhl(ifb2_intf[3:4])
  );

`ifndef verilator  // Backwards slicing not supported
  sub sub2 (
      .n(2),
      .clk,
      .cyc,
      .alh(ifa1_intf[1:2]),  // backwards vs decl
      .ahl(ifa2_intf[1:2]),  // backwards vs decl
      .blh(ifb1_intf[2:1]),  // backwards vs decl
      .bhl(ifb2_intf[2:1])  // backwards vs decl
  );

  sub sub3 (
      .n(3),
      .clk,
      .cyc,
      .alh(ifa1_intf[3:4]),  // backwards vs decl
      .ahl(ifa2_intf[3:4]),  // backwards vs decl
      .blh(ifb1_intf[4:3]),  // backwards vs decl
      .bhl(ifb2_intf[4:3])  // backwards vs decl
  );
`endif

  always @(posedge clk) begin
    cyc <= cyc + 1;
    if (cyc == 1) begin
      ifa1_intf[1].index = 'h101;
      ifa1_intf[2].index = 'h102;
      ifa1_intf[3].index = 'h103;
      ifa1_intf[4].index = 'h104;
      ifa2_intf[1].index = 'h201;
      ifa2_intf[2].index = 'h202;
      ifa2_intf[3].index = 'h203;
      ifa2_intf[4].index = 'h204;
      ifb1_intf[1].index = 'h301;
      ifb1_intf[2].index = 'h302;
      ifb1_intf[3].index = 'h303;
      ifb1_intf[4].index = 'h304;
      ifb2_intf[1].index = 'h401;
      ifb2_intf[2].index = 'h402;
      ifb2_intf[3].index = 'h403;
      ifb2_intf[4].index = 'h404;
    end
  end

endmodule

module sub (
    input logic clk,
    input int cyc,
    input int n,
    intf alh[1:2],
    intf ahl[2:1],
    intf blh[1:2],
    intf bhl[2:1]
);

  always @(posedge clk) begin

    if (cyc == 5) begin
      if (n == 0) begin
        `checkh(alh[1].index, 'h102);
        `checkh(alh[2].index, 'h101);
        `checkh(ahl[1].index, 'h201);
        `checkh(ahl[2].index, 'h202);
        `checkh(blh[1].index, 'h301);
        `checkh(blh[2].index, 'h302);
        `checkh(bhl[1].index, 'h402);
        `checkh(bhl[2].index, 'h401);
      end
      else if (n == 1) begin
        `checkh(alh[1].index, 'h104);
        `checkh(alh[2].index, 'h103);
        `checkh(ahl[1].index, 'h203);
        `checkh(ahl[2].index, 'h204);
        `checkh(blh[1].index, 'h303);
        `checkh(blh[2].index, 'h304);
        `checkh(bhl[1].index, 'h404);
        `checkh(bhl[2].index, 'h403);
      end
      else if (n == 2) begin
        `checkh(alh[1].index, 'h101);
        `checkh(alh[2].index, 'h102);
        `checkh(ahl[1].index, 'h202);
        `checkh(ahl[2].index, 'h201);
        `checkh(blh[1].index, 'h302);
        `checkh(blh[2].index, 'h301);
        `checkh(bhl[1].index, 'h401);
        `checkh(bhl[2].index, 'h402);
      end
      else if (n == 3) begin
        `checkh(alh[1].index, 'h103);
        `checkh(alh[2].index, 'h104);
        `checkh(ahl[1].index, 'h204);
        `checkh(ahl[2].index, 'h203);
        `checkh(blh[1].index, 'h304);
        `checkh(blh[2].index, 'h303);
        `checkh(bhl[1].index, 'h403);
        `checkh(bhl[2].index, 'h404);
      end
    end
    if (cyc == 9 && n == 0) begin
      $write("*-* All Finished *-*\n");
      $finish;
    end
  end

endmodule