Not getting the actual names of inputs,outputs,registers in sta.

[Vinayakamk]

INTENTION: to set path groups, so we need list of inputs ,registers and outputs from sta tool after reading sythesised verilog.

now,after reading liberty,verilog and linking the design ,all_inputs,all_outputs,all_registers cmd gives list renamed intances, why it isnt showing actual names of inputs,registers,outputs as specified in verilog?

{kindy see the preview for image and attached yosys generated verilog file in txt as extention. }

mk_combo_mul.txt sythesised verilog

[rovinski]

Those commands return pointers to the objects. If you want the names, then use get_name. I don't know if there's a command that works on a list, but a for loop will work:

openroad> all_registers
_90dec8996d550000_p_Instance _00dfc8996d550000_p_Instance _70dfc8996d550000_p_Instance _e0dfc8996d550000_p_Instance

openroad> foreach reg [all_registers] {puts [get_name $reg]}
_672_
_673_
_674_
_675_
_676_

[jjcherry56]

set_path_group arguments accept the result of all_registers or all_inputs like any other sta command. That is the whole point of SDC. The printed result is irrelevant. get_full_name is more appropriate if the netlist has hierarchy.

[Vinayakamk]

thanx for replying u both. my problem is what could be the issue for this design (mk_combo_mul ) that i couldnot able to set path group apart from input to output path group.

but i could get all the path groups for the picorv32 which is available code in openlane design section.

.sdc file is attached for setting up path group.. mk_combo_mul_sdc.txt

kindly check where i went wrong should the liberty file should be choosen which supports all this or something else?

[jjcherry56]

I can't decode your message but it is pretty obvious that the command file does not use sdc commands correctly. It looks like you cut/pasted the output of all_inputs/all_registers commands into the command file. The correct way to call the command is as a tcl function that returns the value:

group_path -name i2o -from [all_inputs] -to [all_outputs]

or something similar.