Cadence code coverage tool

So it is recommended not to enable code coverage during your test development, and do it during your regression run only. To enable code coverage in Incisive, give -coverage all option to irun.

You can also specify which type is required as follows -coverage block:fsm. Limitations of Code Coverage: Code coverage is an important indication for the verification engineer on how well the design code has been executed by the tests.

But it does not know anything about the design and what the design is supposed to do. There is no way to find what is missing in the RTL code, as code coverage can only tell quality of the implemented code.

Non-implemented features cannot be identified. Missing feature cannot be identified by code coverage as it only look into design code and does not know the functionality of the design. Not possible to indicate whether all possible values of a feature are tested. For example code coverage cannot report whether all legal combination of states are executed by the tests. Another example is, generate packets using randomization with all possible lengths.

Code coverage does not look into the sequences of events which is happened before, after or during the line of code has been executed. Hence code coverage does not ensure verification completeness.

Code coverage and Functional coverage comparison. Which is important — Functional or Code Coverage? Code coverage is a measure of quality of RTL code execution while simulating the test-cases. Functional coverage measure how well the design functionality have been covered by the tests during simulation. Functionality is defined using coverage groups and points. The functional coverage metric is very subjective, so to improve the quality of functional coverage report, quality of functional coverage points and its implementation have to be improved.

So both code coverage and functional coverage are equally important in verification. All simulation tool does. For example Incisive From Cadence. It needs switches to enable different types of coverage like branch, fsm etc. Pingback: What is code coverage? It may not display this or other websites correctly. You should upgrade or use an alternative browser.

Generating coverage data with Cadence NCsim. Thread starter junaid Start date Aug 14, Status Not open for further replies. Hi folks, Can anyone help me for generating coverage data with cadence NCsim.? Actaully I am facing problem in specifing arguments constraints especailly for locating the design unit. Regards, Junaid. Regards Ramesh.

S Added after 2 minutes: Hi i forgot to mention that the instance name should be given from top level i. DUT regards Ramesh. Click to expand U r correct I was not giving proper path in hierarchy. And Ajeetha, U also mentioned that right its looking for the design unit in compiled work library Thanx for info.

I'll get back to you on further progress I have. In cds. I even tried that. I think the probelm is to provide path of library which contains design unit. I'm still working on that. I wonder because the whole design has already been compiled, elaborated and runned on simvision. Only in case of coverage its not working. The design is quite big and written in verilog as well.

I'm still working on it and will update you on that.. U might have documents given with cadence tools. You can find the pdf document with name "nccodcov. This document has the description of code coverage Bye, Praveen. I need help on functional coverage. But it doesnt have any coverage information. Thanks Praveen I got it.

Re: ncelab -coverage hi dear, as i am a newcomer,i need your help to start the code coverage as i have got the VHDL coding for a two port and the test bench coding for that ,but can you just help me that how i should start for code coverage.