SDF annotation and a flatten netlist (schematic)

[ywguo]

Hi Guys,

I have a flatten schematic, imported from a flatten verilog netlist. To speed the ams simulation, I want to annotate SDF. However, it always reports the following Warning info. It seems that ams simulator does not find the instance in my flatten neltist.

Tools version are
irun(64): 10.20-s043

The irun.log has the following information.

Reading SDF file from location "./tmp/digital_top_hold_func.3.0.sdf"
Annotating SDF timing data:
Compiled SDF file: digital_top_hold_func.3.0.sdf.X
Log file:
Backannotation scope: mux_sim.u_digital_top
Configuration file:
MTM control: MINIMUM
Scale factors:
Scale type:
ncelab: *W,SDFINF: Instance u_filter_q/u_if_process/FE_OCPC17354_N_120 not found at scope level <top-level> <./tmp/digital_top_func_hold.3.0.sdf, liine 164027>.

In line 164027, ./tmp/digital_top_func_hold.3.0.sdf, it is

(INTERCONNECT u_filter_q\/u_if_process\/FE_OCPC17354_N_120/Y u_filter_q\/u_if_process\/p0654A1920/A0 (0.0000: :0.0000) (0.0000: :0.0000))

Every slash indicates the hierarchy is preceded by a back slash in SDF file. I think that eliminates the hierarchy and make it suitable for a flatten netlist. However, in the irun.log file the back slash disappears and it did not find the instance FE_OCPC17354_N_120.

What's wrong with my simulation? Any comments are appreciated.

Best Regards,
Yawei

 

[tariq786]

why not you ignore the warnings and check the simulation result from waveform viewer or testbench?

If there are errors, report them here

 

[my2817]

ur netlist is flattened, but ur sdf is in hierachy format, so, that is where the warning coming out. Try to write out the sdf file after flatten ur netlist,Best regard!

 

[ywguo]

Hi my2817,

You said that my SDF file is in hierarchy format. I thought it was in flatten format because there is back slash "\" leading the slash "/". Is it correct?


Yawei