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[/] [ft816float/] [trunk/] [test_bench/] [fpDivide_tb.v] - Rev 61
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`timescale 1ns / 1ps // ============================================================================ // __ // \\__/ o\ (C) 2006-2020 Robert Finch, Waterloo // \ __ / All rights reserved. // \/_// robfinch<remove>@finitron.ca // || // // fpDivider_tb.v // - floating point divider test bench // // BSD 3-Clause License // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // // Floating Point Multiplier / Divider // // This multiplier/divider handles denormalized numbers. // The output format is of an internal expanded representation // in preparation to be fed into a normalization unit, then // rounding. Basically, it's the same as the regular format // except the mantissa is doubled in size, the leading two // bits of which are assumed to be whole bits. // // // ============================================================================ module fpDivide_tb(); reg rst; reg clk; reg [15:0] adr; reg [63:0] a,b; wire [63:0] o; reg [63:0] ad,bd; wire [63:0] od; reg [3:0] rm; wire [63:0] doubleA = {a[31], a[30], {3{~a[30]}}, a[29:23], a[22:0], {29{1'b0}}}; wire [63:0] doubleB = {b[31], b[30], {3{~b[30]}}, b[29:23], b[22:0], {29{1'b0}}}; integer outfile; initial begin rst = 1'b0; clk = 1'b0; adr = 0; a = $urandom(1); b = 1; #20 rst = 1; #50 rst = 0; #1000000 $fclose(outfile); #10 $finish; end always #5 clk = ~clk; reg [7:0] count; always @(posedge clk) if (rst) begin adr <= 0; count <= 0; end else begin if (adr==0) begin outfile = $fopen("d:/cores2020/rtf64/v2/rtl/verilog/cpu/fpu/test_bench/fpDivide_tvo.txt", "wb"); $fwrite(outfile, "rm ------ A ------ ------- B ------ - DUT Quotient - - SIM Quotient -\n"); end count <= count + 1; if (count > 52) count <= 1'd1; if (count==2) begin a[31:0] <= $urandom(); b[31:0] <= $urandom(); a[63:32] <= $urandom(); b[63:32] <= $urandom(); rm <= adr[15:13]; //ad <= memd[adr][63: 0]; //bd <= memd[adr][127:64]; end if (count==51) begin $fwrite(outfile, "%h\t%h\t%h\t%h\t%h%c\n", rm, a, b, o, $realtobits($bitstoreal(a) / $bitstoreal(b)),$realtobits($bitstoreal(a) / $bitstoreal(b))!=o ? "*":" "); adr <= adr + 1; end end //fpMulnr #(64) u1 (clk, 1'b1, a, b, o, rm);//, sign_exe, inf, overflow, underflow); fpDividenr u6 ( .rst(rst), .clk(clk), .clk4x(1'b0), .ce(1'b1), .ld(count==3), .op(1'b0), .a(a), .b(b), .o(o), .rm(rm), .done(), .sign_exe(), .inf(), .overflow(), .underflow() ); endmodule
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