How to write coverpoint for real data type?

Coverage
1

Hi,

I want to write coverage for the real data type. I had written my code as mentioned below :

//Real datatype to store timing
realtime tdqss;

covergroup timing_param_cg (string name=“bank_addr_cg”);
option.per_instance = 1;
option.name = name;
//coverage related to tdqss
tdqss_cp : coverpoint m_tdqss
{
option.range_precision = 0.01;
bins tdqss_min = {-0.25};
bins tdqss_max = { 0.25};
bins tdqss_range[3] = {[-0.24 : 0.24]};
}
endgroup : timing_param_cg

I had written above covergroup in interface and when I had run above code it shout below error :
"Field/method name (range_precision) not in ‘option’ "

So can anyone please tell me how to write coverage for real variable ??

2

In reply to Vatsal Solanki:
Functional coverage of real data types is not part of the current SystemVerilog standard. You will need to contact your vendor for support of any extensions.

3

In reply to Vatsal Solanki:

You could possibly use $realtobits and convert the real number to a 64-bit vector and cover that?

Give it a try. A similar trick was used for randomization at: http://cvcblr.com/?p=400 (if you get a 404 error, try reload, some website issue)

Srini