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// ============================================================================

//        __

//   \\__/ o\    (C) 2022  Robert Finch, Waterloo

//    \  __ /    All rights reserved.

//     \/_//     robfinch@finitron.ca

//       ||

//

//      df128Toi_tb.sv

//  - test convert decimal floating point to integer

//

// BSD 3-Clause License

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// modification, are permitted provided that the following conditions are met:

//

// 1. Redistributions of source code must retain the above copyright notice, this

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// ============================================================================

module df128Toi_tb();

reg rst;

reg clk;

reg [15:0] adr;

reg [127:0] flt;

reg [7:0] count;

wire [127:0] bin;

wire vf;

integer outfile;

initial begin

        rst = 1'b0;

        clk = 1'b0;

        adr = 0;

        flt = $urandom(1);

        #20 rst = 1;

        #50 rst = 0;

        #10000000  $fclose(outfile);

        #10 $finish;

end

always #5

        clk = ~clk;

genvar g;

generate begin : gRand

        for (g = 0; g < 128; g = g + 4) begin

                always @(posedge clk) begin

                        if (count==2)

                                flt[g+3:g] <= $urandom() % 16;

                end

        end

end

endgenerate

always @(posedge clk)

if (rst) begin

        adr <= 0;

        count <= 0;

end

else

begin

  if (adr==0) begin

    outfile = $fopen("d:/cores2022/rf6809/rtl/dfpu/test_bench/df128Toi_tvo.txt", "wb");

    $fwrite(outfile, "s ------ flt ------  ------ bin ------  \n");

  end

        count <= count + 1;

        if (count > 140)

                count <= 1'd1;

        if (adr==1) begin

                flt <= 128'h25ffc000000000000000000000000000;   // 1

        end

        if (adr==2) begin

                flt <= 128'h26000000000000000000000000000000;   // 10

        end

        if (adr==3) begin

                flt <= 128'h26004000000000000000000000000000;   // 100

        end

        if (adr==4) begin

                flt <= 128'h26008000000000000000000000000000;   // 1000

        end

        if (adr==5) begin

                flt <= 128'h2601934B9C0C00000000000000000000;   // 12345678

        end

        if (count==140) begin

        $fwrite(outfile, "%c %h\t%h%c\n", adr[11] ? "s" : "u", flt, bin, vf ? "v": " ");

                adr <= adr + 1;

        end

end

df128Toi u6 (

        .rst(rst),

  .clk(clk),

  .ce(1'b1),

  .op(adr[11]),

  .ld(count==3),

  .i(flt),

  .o(bin),

  .overflow(vf),

  .done()

);

endmodule