Detecting the Time Unit from `timescale

SystemVerilog
,
2

In reply to rr2007:

Please ignore the arrow anti-pattern, basically you can try to cast to int to get the time unit

`timescale 1ns/1fs

module test;
  
  initial 
    begin
      if (int'(1us) == 1) begin 
        $display("It's us");
      end 
      else begin
        if (int'(1ns) == 1) begin
          $display("It's ns");
        end
        else begin
          if (int'(1ps) == 1) begin 
            $display("It's ps");
          end
          else begin
            if (int'(1fs) == 1) $display("It's fs");
          end
        end
      end
    end  
endmodule

It gives

# KERNEL: It's ns

If the time unit matches the value in the cast then the expression int’(1[timeunit]) == 1 will become true.

HTH,

-R