// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2015 Varun Koyyalagunta
// SPDX-License-Identifier: CC0-1.0

// bug1015
module t (
    input clk
);

  integer cyc = 0;
  reg [63:0] crc;
  reg [63:0] sum;

  // Take CRC data and apply to testblock inputs
  wire [1:0] i = crc[1:0];
  logic [1:0] o[13:10];

  Test test (  /*AUTOINST*/
      // Outputs
      .o(o  /*[1:0].[3:0]*/),
      // Inputs
      .i(i[1:0])
  );

  // Aggregate outputs into a single result vector
  wire [63:0] result = {32'h0, 6'h0, o[13], 6'h0, o[12], 6'h0, o[11], 6'h0, o[10]};

  // Test loop
  always @(posedge clk) begin
`ifdef TEST_VERBOSE
    $write("[%0t] cyc==%0d crc=%x result=%x sum=%x\n", $time, cyc, crc, result, sum);
`endif
    cyc <= cyc + 1;
    crc <= {crc[62:0], crc[63] ^ crc[2] ^ crc[0]};
    sum <= result ^ {sum[62:0], sum[63] ^ sum[2] ^ sum[0]};
    if (cyc == 0) begin
      // Setup
      crc <= 64'h5aef0c8d_d70a4497;
      sum <= '0;
    end
    else if (cyc < 10) begin
      sum <= '0;
    end
    else if (cyc < 90) begin
    end
    else if (cyc == 99) begin
      $write("[%0t] cyc==%0d crc=%x sum=%x\n", $time, cyc, crc, sum);
      if (crc !== 64'hc77bb9b3784ea091) $stop;
      // What checksum will we end up with (above print should match)
      `define EXPECTED_SUM 64'hb42b2f48a0a9375a
      if (sum !== `EXPECTED_SUM) $stop;
      $write("*-* All Finished *-*\n");
      $finish;
    end
  end

endmodule

module Test (
    output logic [1:0] o[3:0],
    //but this works
    //logic [N-1:0] o
    input [1:0] i
);

  parameter N = 4;

  logic [1:0] a[3:0];
  initial a = '{2'h0, 2'h1, 2'h2, 2'h3};

  sub sub[N-1:0] (
      .o(o),  // many-to-many
      .a(a),  // many-to-many
      .i(i)
  );  // many-to-one
endmodule

module sub (
    input logic [1:0] i,
    input logic [1:0] a,
    output logic [1:0] o
);
  assign o = i + a;
endmodule