//------------------------------------------------------------------------------
//
// tb_modular_mover.v
// -----------------------------------------------------------------------------
// Testbench for multi-word data mover.
//
// 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_mw_mover;
//
// Test Vectors
//
localparam [255:0] X_1 = 256'h1ddbd0769df27bab1e234019dad09dccce1e87e2193b417ffa1a3465d7439ecd;
localparam [255:0] X_2 = 256'h1f67cdc34bac91a072945d212f0a03442fc4855788583ecb7b2e375ad3848210;
localparam [255:0] X_3 = 256'hff563f653b1392a6fa6b0295a280f7a904a11e22d8ae468e220301d8ac232fcf;
localparam [255:0] X_4 = 256'hf6f53c4b57b25453b68e923fb118e4f753d74af01fc58476dd15a80933453899;
//
// Core Parameters
//
localparam WORD_COUNTER_WIDTH = 3;
localparam OPERAND_NUM_WORDS = 8;
//
// Clock (100 MHz)
//
reg clk = 1'b0;
always #5 clk = ~clk;
//
// Inputs, Outputs
//
reg rst_n;
reg ena;
wire rdy;
//
// Buffers (X, Y)
//
wire [WORD_COUNTER_WIDTH-1:0] core_x_addr;
wire [WORD_COUNTER_WIDTH-1:0] core_y_addr;
wire core_y_wren;
wire [ 32-1:0] core_x_data;
wire [ 32-1:0] core_y_data;
reg [WORD_COUNTER_WIDTH-1:0] tb_x_addr;
reg [WORD_COUNTER_WIDTH-1:0] tb_y_addr;
reg tb_x_wren;
reg [ 32-1:0] tb_x_data;
wire [ 32-1:0] tb_y_data;
bram_1rw_1ro_readfirst #
(
.MEM_WIDTH (32),
.MEM_ADDR_BITS (WORD_COUNTER_WIDTH)
)
bram_x
(
.clk (clk),
.a_addr (tb_x_addr),
.a_wr (tb_x_wren),
.a_in (tb_x_data),
.a_out (),
.b_addr (core_x_addr),
.b_out (core_x_data)
);
bram_1rw_1ro_readfirst #
(
.MEM_WIDTH (32),
.MEM_ADDR_BITS (WORD_COUNTER_WIDTH)
)
bram_d
(
.clk (clk),
.a_addr (core_y_addr),
.a_wr (core_y_wren),
.a_in (core_y_data),
.a_out (),
.b_addr (tb_y_addr),
.b_out (tb_y_data)
);
//
// UUT
//
mw_mover #
(
.WORD_COUNTER_WIDTH (WORD_COUNTER_WIDTH),
.OPERAND_NUM_WORDS (OPERAND_NUM_WORDS)
)
uut
(
.clk (clk),
.rst_n (rst_n),
.ena (ena),
.rdy (rdy),
.x_addr (core_x_addr),
.y_addr (core_y_addr),
.y_wren (core_y_wren),
.x_din (core_x_data),
.y_dout (core_y_data)
);
//
// Testbench Routine
//
reg ok = 1;
initial begin
/* initialize control inputs */
rst_n = 0;
ena = 0;
tb_x_wren = 0;
/* wait for some time */
#200;
/* de-assert reset */
rst_n = 1;
/* wait for some time */
#100;
/* run tests */
test_modular_mover(X_1);
test_modular_mover(X_2);
test_modular_mover(X_3);
test_modular_mover(X_4);
/* print result */
if (ok) $display("tb_modular_mover: SUCCESS");
else $display("tb_modular_mover: FAILURE");
//
$finish;
//
end
//
// Test Task
//
reg [255:0] y;
reg y_ok;
integer w;
reg [255:0] x_shreg;
reg [255:0] y_shreg;
task test_modular_mover;
input [255:0] x;
begin
/* start filling memories */
tb_x_wren = 1;
/* initialize shift registers */
x_shreg = x;
/* write all the words */
for (w=0; w<OPERAND_NUM_WORDS; w=w+1) begin
/* set addresses */
tb_x_addr = w[WORD_COUNTER_WIDTH-1:0];
/* set data words */
tb_x_data = x_shreg[31:0];
/* shift inputs */
x_shreg = {{32{1'bX}}, x_shreg[255:32]};
/* wait for 1 clock tick */
#10;
end
/* wipe addresses */
tb_x_addr = {WORD_COUNTER_WIDTH{1'bX}};
/* wipe data words */
tb_x_data = {32{1'bX}};
/* stop filling memories */
tb_x_wren = 0;
/* start operation */
ena = 1;
/* clear flag */
#10 ena = 0;
/* wait for operation to complete */
while (!rdy) #10;
/* read result */
for (w=0; w<OPERAND_NUM_WORDS; w=w+1) begin
/* set address */
tb_y_addr = w[WORD_COUNTER_WIDTH-1:0];
/* wait for 1 clock tick */
#10;
/* store data word */
y_shreg = {tb_y_data, y_shreg[255:32]};
end
/* compare */
y_ok = (y_shreg == x);
/* display results */
$display("test_modular_mover(): %s", y_ok ? "OK" : "ERROR");
/* update global flag */
ok = ok && y_ok;
end
endtask
endmodule
//------------------------------------------------------------------------------
// End-of-File
//------------------------------------------------------------------------------
