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

//        __

//   \\__/ o\    (C) 2019  Robert Finch, Waterloo

//    \  __ /    All rights reserved.

//     \/_//     robfinch<remove>@finitron.ca

//       ||

//

//      fpAddsub_tb.v

//

// This source file is free software: you can redistribute it and/or modify 

// it under the terms of the GNU Lesser General Public License as published 

// by the Free Software Foundation, either version 3 of the License, or     

// (at your option) any later version.                                      

//                                                                          

// This source file is distributed in the hope that it will be useful,      

// but WITHOUT ANY WARRANTY; without even the implied warranty of           

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            

// GNU General Public License for more details.                             

//                                                                          

// You should have received a copy of the GNU General Public License        

// along with this program.  If not, see <http://www.gnu.org/licenses/>.    

//                                                                          

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

module fpAddsub_tb();

reg rst;

reg clk;

reg [15:0] adr;

reg [103:0] mem [0:38000];

reg [103:0] memo [0:38000];

reg [199:0] memd [0:38000];

reg [199:0] memdo [0:38000];

reg [391:0] memq [0:38000];

reg [391:0] memqo [0:38000];

reg [31:0] a,b,a6,b6;

reg [63:0] ad, bd;

reg [127:0] aq, bq;

wire [127:0] oq;

wire [31:0] a5,b5;

wire [31:0] o;

wire [63:0] od;

reg [3:0] rm, op, rmq, opq, rmd, opd;

wire [3:0] rm5;

wire [3:0] op5;

initial begin

        rst = 1'b0;

        clk = 1'b0;

        adr = 0;

        $readmemh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvs.txt", mem);

        $readmemh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvd.txt", memd);

        $readmemh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvq.txt", memq);

        #20 rst = 1;

        #50 rst = 0;

end

always #5

        clk = ~clk;

reg [7:0] count;

always @(posedge clk)

if (rst) begin

        adr <= 0;

        count <= 0;

end

else

begin

        count <= count + 1;

        if (count==49)

                count <= 0;

        if (count==2) begin

                a <= mem[adr][31: 0];

                b <= mem[adr][63:32];

                rm <= mem[adr][99:96];

                op <= mem[adr][103:100];

                ad <= memq[adr][63: 0];

                bd <= memq[adr][127:64];

                rmd <= memq[adr][195:192];

                opd <= memq[adr][199:196];

                aq <= memq[adr][127: 0];

                bq <= memq[adr][255:128];

                rmq <= memq[adr][387:384];

                opq <= memq[adr][391:388];

        end

        if (count==48) begin

                memo[adr] <= {op,rm,o,b,a};

                memdo[adr] <= {opd,rmd,od,bd,ad};

                memqo[adr] <= {opq,rmq,oq,bq,aq};

                if (adr==8192) begin

                        $writememh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvso.txt", memo);

                        $writememh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvdo.txt", memdo);

                        $writememh("d:/cores6/nvio/v2/rtl/fpUnit/test_bench/fpAddsub_tvqo.txt", memqo);

                        $finish;

                end

                adr <= adr + 1;

        end

end

fpAddsubnr #(32) u1 (clk, 1'b1, rm[2:0], op[0], a, b, o);

fpAddsubnr #(64) u2 (clk, 1'b1, rmd[2:0], opd[0], ad, bd, od);

fpAddsubnr #(128) u3 (clk, 1'b1, rmq[2:0], opq[0], aq, bq, oq);

endmodule