1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
/*
* Basics tests of continuous assignment.
*/
module testbench();
reg [3:0] a, b;
integer c, d;
wire [3:0] x, y, z;
assign x = a + b + b;
assign y = b - a;
assign z = a + (a * b);
initial begin
a <= 4'h2;
b <= 4'h3;
#1;
if (x !== 4'h8)
begin
$display("FAILED -- 2 + 3 + 3 !== 8");
$finish;
end
if (y !== 4'h1)
begin
$display("FAILED -- 3 - 2 !== 1");
$finish;
end
if (z !== 4'h8)
begin
$display("FAILED -- 2 + (2 * 3) !== 8");
$finish;
end
$display("PASSED");
end
endmodule // testbench
|
