Difference between get_inst_coverage and get_coverage

[omahesh]

Hi,

I'm trying to observe the difference between get_coverage & get_inst_coverage with the following example;

class trans;

rand logic wrd;

rand logic [2:0] addr;

rand logic [7:0] din;

rand logic [2:0] no_of_rst;

covergroup cg;

type_option.merge_instances = 1;

option.per_instance = 1;

option.get_inst_coverage = 1;

op_t: coverpoint addr;

op_r: coverpoint din;

endgroup

function new();

cg = new();

endfunction : new

endclass

program main();

trans trans_0 = new();

trans trans_1 = new();

trans trans_2 = new();

initial begin

trans_0.randomize();

trans_1.randomize();

trans_2.randomize();

trans_0.cg.sample();

trans_2.cg.sample();

$display("coverage:%f",trans_0.cg.get_coverage());

$display("coverage1:%f",trans_2.cg.get_inst_coverage());

$display("coverage1:%f",trans_2.cg.get_coverage());

end

endprogram

But the tool is showing error at lines type_option.merge_instances and at option.get_inst_coverage.

Can anyone suggest me the how can i get the get_inst_coverage result which is different from get_coverage?

Thanks,

Regards,

Mahee.

[omahesh]

Hi,

I forgot to share one thing that is, I got those errors in Cadence 10.20 version.

Regards,

Mahee.

[uwes]

i assume the tool is saying that this is not supported in the 10.20 release, right? you should try a more recent release such as 11.*,12.1,12.20,... as a side note you can view the type and/or instance based coverage using "iccr" or "imc" without the need of the direct coverage api/options.

/uwe