//********************************************************************************
// SPDX-License-Identifier: Apache-2.0
// Copyright 2020 Western Digital Corporation or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//********************************************************************************

module el2_ifu_tb_memread;

  logic   [15:0] compressed     [0:128000];  // vector of compressed instructions
  logic   [31:0] expected       [0:128000];  // vector of correspoding expected instruction


  logic          rst_l;
  logic          clk;

  int            clk_count;



  logic   [31:0] expected_val;
  logic   [15:0] compressed_din;

  logic   [31:0] actual;

  logic          error;

  integer        i;
  initial begin

    clk   = 0;
    rst_l = 0;

    // initialize the reads and populate the instruction arrays
    $readmemh("left64k", compressed);
    $readmemh("right64k", expected);

    $dumpfile("top.vcd");
    $dumpvars;
    $dumpon;

  end

  always #50 clk = ~clk;

  always @(posedge clk) begin
    clk_count = clk_count + 1;
    if (clk_count >= 1 & clk_count <= 3) rst_l <= 1'b0;
    else rst_l <= 1'b1;

    if (clk_count > 3) begin

      compressed_din[15:0] <= compressed[clk_count-3];  // c.mv
      expected_val[31:0]   <= expected[clk_count-3];

    end

    if (clk_count == 65000) begin
      $dumpoff;
      $finish;
    end
  end  // always @ (posedge clk)

  always @(negedge clk) begin
    if (clk_count > 3 & error) begin
      $display("clock: %d compressed %h error actual %h expected %h", clk_count, compressed_din,
               actual, expected_val);
    end
  end


  el2_ifu_compress_ctl align (
      .*,
      .din (compressed_din[15:0]),
      .dout(actual[31:0])
  );

  assign error = actual[31:0] != expected_val[31:0];



endmodule  // el2_ifu_tb_memread