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Diffstat (limited to 'bench/tb_lowlevel_adder47.v')
| -rw-r--r-- | bench/tb_lowlevel_adder47.v | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/bench/tb_lowlevel_adder47.v b/bench/tb_lowlevel_adder47.v new file mode 100644 index 0000000..2a575a8 --- /dev/null +++ b/bench/tb_lowlevel_adder47.v @@ -0,0 +1,151 @@ +//------------------------------------------------------------------------------
+//
+// tb_lowlevel_adder47.v
+// -----------------------------------------------------------------------------
+// Testbench for 47-bit adder.
+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2016, NORDUnet A/S
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - 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.
+//
+// - Neither the name of the NORDUnet 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.
+//
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+`timescale 1ns / 1ps
+//------------------------------------------------------------------------------
+
+
+module tb_lowlevel_adder47;
+
+ //
+ // Inputs
+ //
+ reg clk;
+ reg [46: 0] a;
+ reg [46: 0] b;
+
+ //
+ // Outputs
+ //
+ wire [46: 0] s;
+
+ //
+ // Test Vectors {a, b}
+ //
+ wire [93: 0] vec_0 = {47'h2a87ca22be8b, 47'h05378eb1c71e};
+ wire [93: 0] vec_1 = {47'h7320ad746e1d, 47'h3b628ba79b98};
+ wire [93: 0] vec_2 = {47'h59f741e08254, 47'h2a385502f25d};
+ wire [93: 0] vec_3 = {47'h3f55296c3a54, 47'h5e3872760ab7};
+ wire [93: 0] vec_4 = {47'h3617de4a9626, 47'h2c6f5d9e98bf};
+ wire [93: 0] vec_5 = {47'h1292dc29f8f4, 47'h1dbd289a147c};
+ wire [93: 0] vec_6 = {47'h69da3113b5f0, 47'h38c00a60b1ce};
+ wire [93: 0] vec_7 = {47'h1d7e819d7a43, 47'h1d7c90ea0e5f};
+
+ //
+ // UUT
+ //
+ adder47_wrapper uut
+ (
+ .clk (clk),
+ .a (a),
+ .b (b),
+ .s (s)
+ );
+
+
+ //
+ // Testbench Routine
+ //
+ reg ok = 1;
+ initial begin
+ //
+ clk = 0;
+ //
+ #100;
+ //
+ test_adder47(vec_0);
+ test_adder47(vec_1);
+ test_adder47(vec_2);
+ test_adder47(vec_3);
+ test_adder47(vec_4);
+ test_adder47(vec_5);
+ test_adder47(vec_6);
+ test_adder47(vec_7);
+ //
+ if (ok) $display("tb_lowlevel_adder47: SUCCESS");
+ else $display("tb_lowlevel_adder47: FAILURE");
+ //
+ $finish;
+ //
+ end
+
+
+ //
+ // Test Routine
+ //
+ reg [46: 0] ss; // reference value of sum
+ reg cc; // reference value of carry
+ reg ss_ok; // result matches reference value
+
+ task test_adder47;
+
+ input [93: 0] vec;
+
+ begin
+
+ /* break down test vector */
+ a = vec[93:47];
+ b = vec[46: 0];
+
+ /* calculate reference values */
+ ss = a + b;
+
+ /* send one clock tick */
+ #10 clk = 1;
+ #10 clk = 0;
+
+ /* check outputs */
+ ss_ok = (s == ss);
+
+ /* display results */
+ $display("test_adder47(): %s", ok ? "OK" : "ERROR");
+
+ /* update global flag */
+ ok = ok && ss_ok;
+
+ end
+
+ endtask
+
+endmodule
+
+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------
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