# How can I go from timing reports to Verilog?

Tool: OpenSTA

Subcategory: Tracing timing paths

## Conversation

### oharboe
I have a timing path in the OpenROAD GUI that I want to understand.

How can I go from the timing report in the GUI to the Verilog?

### maliberty
https://github.com/The-OpenROAD-Project/OpenROAD-flow-scripts/pull/1129 should help with naming once merged.

There is no direct link today so you'll have to work back from the names.  @QuantamHD has some work to store line numbers that is hopefully going to land but has been tied up in OSS licensing issues.

### oharboe
@maliberty Here is an example of how it is hard to get from the static timing report to the Verilog:

Build the design with ` make DESIGN_CONFIG=designs/asap7/mock-array-big/config.mk`, then look at the Element `make DESIGN_CONFIG=designs/asap7/mock-array-big/Element/config.mk gui_final`.

How, in general, do I find my way to the Verilog code?

![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/2798822/840713c0-f33a-484f-b156-9a79e4aad50d)




### maliberty
If you use the rename PR I mentioned then the register should have a name matching the Element.v to some degree.  Does that work here?

### oharboe
What I've heard is that tracking from timing reports back to RTL is an "unsolved problem in EDA tools", so https://github.com/The-OpenROAD-Project/OpenROAD-flow-scripts/pull/1129 is probably as good as it gets for now.

To go beyond this, I suppose Yosys has to grow some sophistication w.r.t. tracking back to the original Verilog.

One of the goals of https://circt.llvm.org/ is to provide an improved infrastructure for RTL as it goes through a number of tools in a flow. Perhaps, one day, yosys will support https://circt.llvm.org/. Ideally this would give Yosys more input languages and better "debug information" through synthesis and technology mapping...