Assertion in verilog

Question

In my Verilog project, the signal "CsrPlugin_exceptionPortCtrl_exceptionContext_code" is typically set to 4'bxxxx under normal conditions and take values from 4'b0000 to 4'b1111 during exceptional conditions. To monitor this signal during simulation, I aim to identify exceptional conditions and promptly respond. I have implemented the following code:

always @(posedge clk) begin
  if (CsrPlugin_exceptionPortCtrl_exceptionContext_code >= 0) begin
    $display("crash");
    $stop;
  end
end

I want to ask if possible to realize this goal by using assert?

Answer 1

In verilog you could emulate an assert with a define.

`define my_assert(signal, value) \
if (signal >= value) $display("my error message"); \
$stop;


always @(posedge clk) begin
  `my_assert(CsrPlugin_exceptionPortCtrl_exceptionContext_code, 0);