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/**
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* Copyright 2006, Ira W. Snyder (devel@irasnyder.com)
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* License: GNU General Public License v2 (or, at your option, any later
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* version)
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*/
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/**
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* Name: Ira Snyder
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* Class: CS365 - Computer Architecture
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* Project #1 - Part 1
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* Due: 2006-02-06
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*/
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/**
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* File: ALU4_test.v
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* Purpose: Test the ALU4 module.
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*/
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module ALU4_test;
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reg[0:3] a, b;
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reg[0:1] op;
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reg cin;
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wire[0:3] result;
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wire cout;
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ALU4 alu (a, b, cin, op, cout, result);
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initial begin
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$monitor ("time=%0d a=%b b=%b op=%b cin=%b cout=%b result=%b",
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$time, a, b, op, cin, cout, result);
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end
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initial begin
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a='b0000; b='b0000; cin=0; op='b00; $display; $display("AND");
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#1 a='b0001; b='b0000; cin=0; op='b00;
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#1 a='b0101; b='b1010; cin=0; op='b00;
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#1 a='b1100; b='b1111; cin=0; op='b00;
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#1 a='b1010; b='b1010; cin=0; op='b00;
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#1 a='b0000; b='b0000; cin=0; op='b01; $display; $display ("OR");
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#1 a='b0001; b='b0000; cin=0; op='b01;
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#1 a='b0101; b='b1010; cin=0; op='b01;
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#1 a='b1100; b='b1111; cin=0; op='b01;
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#1 a='b1010; b='b1010; cin=0; op='b01;
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#1 a='b0000; b='b0000; cin=0; op='b10; $display; $display ("ADD");
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#1 a='b0001; b='b0000; cin=0; op='b10;
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#1 a='b0001; b='b0000; cin=1; op='b10;
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#1 a='b0001; b='b0001; cin=0; op='b10;
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#1 a='b0001; b='b0001; cin=1; op='b10;
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#1 a='b0011; b='b1100; cin=0; op='b10;
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#1 a='b0011; b='b1100; cin=1; op='b10;
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#1 a='b0000; b='b0000; cin=0; op='b11; $display; $display ("SUB");
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#1 a='b0001; b='b0001; cin=0; op='b11;
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#1 a='b0001; b='b0001; cin=1; op='b11;
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#1 a='b0011; b='b0001; cin=0; op='b11;
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#1 a='b0011; b='b0001; cin=1; op='b11;
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#1 a='b1001; b='b0001; cin=0; op='b11;
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#1 a='b1001; b='b0001; cin=1; op='b11;
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end
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endmodule
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