cadence - A yellow icon appears at toggle of signal in ncsim. Cant make out what is it?

Question

I can see a yellow icon appearing at the toggle of a signal in my simulations. The icon shows a square wave like image. I tried to look up for an explanation, closest enough was "zero pulse width" but I am still unsure. No documentation explains what it is exactly and what causes it. Its not causing me any problem but I am just curious. Does anyone have any idea ?

Answer 1

这表明在同一仿真时间步中信号上发生了多次转换。这可以扩展以显示中间值。请参阅 Cadence 论坛上的讨论：http: //community.cadence.com/cadence_technology_forums/f/30/t/26894

一些显示行为的示例代码：

module test;

   logic [1:0] bus;

   initial begin
      bus  = 2'b00;
      #10;
      for(int i = 0; i<8; i++) begin
         bus     = bus + 1;
      end
      #10;
      bus  = 2'b11;
      #10;
      $finish();
   end

endmodule

Simvision 屏幕截图没有和随着时间扩展。要扩展时间，请从“查看”菜单中选择“扩展序列时间->所有时间”。