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-- Filename: ratpack_tb1.vhd
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-- Purpose : A simple testbench for "ratpack".
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-- Author : Nikolaos Kavvadias <nikolaos.kavvadias@gmail.com>
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-- Date : 14-May-2010
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-- Version : 0.1
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-- Revision: 0.0.0 (2010/05/14)
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-- Initial version.
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-- License : Copyright (C) 2010 by Nikolaos Kavvadias
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-- This program is free software. You can redistribute it and/or
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-- modify it under the terms of the GNU Lesser General Public License,
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-- either version 3 of the License, or (at your option) any later
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-- version. See COPYING.
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--
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--------------------------------------------------------------------------------
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library STD, IEEE;
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use STD.textio.all;
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use IEEE.std_logic_1164.all;
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use WORK.ratpack.all;
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entity ratpack_tb is
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end ratpack_tb;
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architecture tb_arch of ratpack_tb is
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-------------------------------------------------------
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-- Declare results file
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-------------------------------------------------------
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file ResultsFile: text open write_mode is
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"ratpack_results.txt";
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-------------------------------------------------------
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-- Constant declarations
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-------------------------------------------------------
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constant CLK_PERIOD : time := 10 ns;
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begin
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-- Test the basic operators.
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TEST_OPS: process
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variable a, b, c: rational := RAT_ZERO;
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variable BufLine: line;
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begin
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a := to_rational(5, 12);
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b := to_rational(2, 3);
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wait for CLK_PERIOD;
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-- Test rational addition
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c := a + b;
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write(Bufline, a(numer));
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write(Bufline, string'("/"));
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write(Bufline, a(denom));
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write(Bufline, string'(" + "));
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write(Bufline, b(numer));
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write(Bufline, string'("/"));
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write(Bufline, b(denom));
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write(Bufline, string'(" = "));
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write(Bufline, c(numer));
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write(Bufline, string'("/"));
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write(Bufline, c(denom));
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writeline(ResultsFile, Bufline);
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wait for CLK_PERIOD;
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-- Test rational subtraction
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c := a - b;
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write(Bufline, a(numer));
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write(Bufline, string'("/"));
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write(Bufline, a(denom));
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write(Bufline, string'(" - "));
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write(Bufline, b(numer));
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write(Bufline, string'("/"));
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write(Bufline, b(denom));
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write(Bufline, string'(" = "));
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write(Bufline, c(numer));
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write(Bufline, string'("/"));
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write(Bufline, c(denom));
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writeline(ResultsFile, Bufline);
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wait for CLK_PERIOD;
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-- Test rational multiplication
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c := a * b;
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write(Bufline, a(numer));
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write(Bufline, string'("/"));
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write(Bufline, a(denom));
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write(Bufline, string'(" * "));
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write(Bufline, b(numer));
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write(Bufline, string'("/"));
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write(Bufline, b(denom));
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write(Bufline, string'(" = "));
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write(Bufline, c(numer));
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write(Bufline, string'("/"));
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write(Bufline, c(denom));
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writeline(ResultsFile, Bufline);
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wait for CLK_PERIOD;
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-- Test rational division
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c := a / b;
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write(Bufline, a(numer));
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write(Bufline, string'("/"));
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write(Bufline, a(denom));
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write(Bufline, string'(" : "));
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write(Bufline, b(numer));
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write(Bufline, string'("/"));
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write(Bufline, b(denom));
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write(Bufline, string'(" = "));
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write(Bufline, c(numer));
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write(Bufline, string'("/"));
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write(Bufline, c(denom));
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writeline(ResultsFile, Bufline);
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wait for CLK_PERIOD;
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-- Test mediant
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c := mediant(a, b);
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write(Bufline, string'("mediant("));
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write(Bufline, a(numer));
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write(Bufline, string'("/"));
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write(Bufline, a(denom));
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write(Bufline, string'(" , "));
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write(Bufline, b(numer));
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write(Bufline, string'("/"));
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write(Bufline, b(denom));
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write(Bufline, string'(") = "));
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write(Bufline, c(numer));
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write(Bufline, string'("/"));
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write(Bufline, c(denom));
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writeline(ResultsFile, Bufline);
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wait for CLK_PERIOD;
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end process TEST_OPS;
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end tb_arch;
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