File: t_order_loop_bad.v

package info (click to toggle)
verilator 5.038-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 162,552 kB
  • sloc: cpp: 139,204; python: 20,931; ansic: 10,222; yacc: 6,000; lex: 1,925; makefile: 1,260; sh: 494; perl: 282; fortran: 22
file content (42 lines) | stat: -rw-r--r-- 913 bytes parent folder | download | duplicates (2)
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
// DESCRIPTION: Verilator: Non-cutable edge in loop
//
// This code (stripped down from a much larger application) has a loop between
// the use of ready in the first two always blocks. However it should
// trivially trigger the $write on the first clk posedge.
//
// This is a regression test against issue #513.
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2012 by Jeremy Bennett.
// SPDX-License-Identifier: CC0-1.0

module t (/*AUTOARG*/
   // Inputs
   clk
   );
   input clk;

   reg   ready;

   initial begin
      ready = 1'b0;
   end

   always @(posedge ready) begin
      if ((ready === 1'b1)) begin
         $write("*-* All Finished *-*\n");
         $finish;
      end
   end

   always @(posedge ready) begin
      if ((ready === 1'b0)) begin
         ready = 1'b1 ;
      end
   end

   always @(posedge clk) begin
      ready = 1'b1;
   end

endmodule