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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2003 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
module t (/*AUTOARG*/
// Inputs
clk
);
input clk;
reg [7:0] cyc; initial cyc = 0;
reg [31:0] loops;
reg [31:0] loops2;
always @ (posedge clk) begin
cyc <= cyc+8'd1;
if (cyc == 8'd1) begin
$write("[%0t] t_loop: Running\n", $time);
// Unwind <
loops = 0;
loops2 = 0;
for (int i=0; i<16; i=i+1) begin
loops = loops + i; // surefire lint_off_line ASWEMB
loops2 = loops2 + i; // surefire lint_off_line ASWEMB
end
if (loops !== 120) $stop;
if (loops2 !== 120) $stop;
// Check we can declare the same signal twice
loops = 0;
for (int i=0; i<=16; i=i+1) begin
loops = loops + 1;
end
if (loops !== 17) $stop;
// Check type is correct
loops = 0;
for (byte unsigned i=5; i>4; i=i+1) begin
loops = loops + 1;
end
if (loops !== 251) $stop;
// Check large loops
loops = 0;
for (int i=0; i<100000; i=i+1) begin
loops = loops + 1;
end
if (loops !== 100000) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
|
