Subversion Repositories ft816float

`timescale 1ns / 1ps

module positAddsub_tb_v;

function [31:0] log2;

input reg [31:0] value;

        begin

        value = value-1;

        for (log2=0; value>0; log2=log2+1)

                value = value>>1;

        end

endfunction

parameter N=52;

parameter E=8;

parameter Bs=log2(N);

parameter es = 4;

reg [N-1:0] in;

reg clk;

reg [5:0] cnt;

wire [N-1:0] out, out2, out3;

reg [N-1:0] a1, b1;

wire [N-1:0] a, b;

wire [N-1:0] psum, fsum, fa, fb, ad, bd, psumd, out2d, psum1;

// Instantiate the Unit Under Test (UUT)

intToPosit #(.PSTWID(N), .es(es)) u1a (.i(a1), .o(a));

intToPosit #(.PSTWID(N), .es(es)) u1b (.i(b1), .o(b));

positToFp #(.FPWID(N), .PSTWID(N), .es(es)) u2

(

  .i(a),

        .o(fa)

);

positToFp #(.FPWID(N), .PSTWID(N), .es(es)) u3

(

  .i(b),

        .o(fb)

);

positAddsub #(.PSTWID(N), .es(es)) uadd1 (1'b0,a,b,psum);

fpAddsub #(.FPWID(N)) uadd2 (clk,1'b1,3'd0,1'b0,fa,fb,fsum);

posit_add #(.N(N),.es(es)) uadd3 (a, b, 1'b1, psum1);

positToFp #(.FPWID(N), .PSTWID(N), .es(es)) u4

(

  .i(psum),

        .o(out2)

);

delay2 #(N) ud1 (.i(a), .o(ad));

delay2 #(N) ud2 (.i(a), .o(bd));

delay2 #(N) ud3 (.i(psum), .o(psumd));

delay2 #(N) ud4 (.i(out2), .o(out2d));

//FP_to_posit #(.N(32), .E(8), .es(es)) u3 (in, out3);

//Posit_to_FP #(.N(32), .E(8), .es(es)) u5 (out, out3);

        initial begin

          a1 = $urandom(1);

          b1 = $urandom(2);

          cnt = 0;

                // Initialize Inputs

                clk = 1;

                // Wait 100 ns for global reset to finish

                #101 in = 32'h0080ffff;

                #325150

                $fclose(outfile);

                $finish;

        end

always #5 clk=~clk;

always @(posedge clk) begin

  cnt = cnt + 1;

  case(cnt)

  0:

    begin

      a1 = 0;

      b1 = 0;

    end

  1:

    begin

      a1 = 0;

      b1 = 10;

    end

  2:

    begin

      a1 = 10;

      b1 = 10;

    end

  default:

    begin

      a1 = $urandom();

      b1 = $urandom();

    end

  endcase

end

integer outfile;

initial outfile = $fopen("d:/cores5/Gambit/v5/rtl/cpu/fpu/test_bench/positAddsub_tvo32.txt", "wb");

  always @(negedge clk) begin

     $fwrite(outfile, "%h\t%h\t%h\t%h\n",a,b,psum,psum1);

  end

endmodule