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retime failed with error msg "Failed on find_unique_design"

archive

I have set attribute retime to a certain design

set_attr retime 1 [find / -subdesign some_design]

after elaboration. However I get following error message after the generic synthesis:

Failed on find_unique_design

The script is structured as follows;
1. read libraries and set library
2. read don't use cells
3. read_hdl
4. elaborate
5. read constraints
6. set costs groups/path groups
7. set_attr retime true [find / -subdesign *]
7. run generic synthesis
8. run technology mapping etc...

I have set this attribute to only one subdesign. find_unique_design is an internal command I think.

Do you have any idea?


Originally posted in cdnusers.org by sporadic crash
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  • archive

    Hi grasshopper,

    The flow is stable and we are pretty confident that only and only one elab occurs.

    That I want to retime a particular subdesign, is correct. Due to my typo, [find / -subdesign *] was stated above. No, I have used the name of the particular subdesign.

    I have tried different combinations but RTL Compiler does not like the retime attributes I set. It always gives me the same error.
    I have set the attrib, run generic synthesis -to_generic. No, I get that error.
    I havfe run generic synthesis -to_generic, I have set the attrib. The same error.
    I have set the attrib right after elab. Then directly synthesize -to_mapped. The same error.
    I am pretty sure that only one subdesign was set for the retime attrib for all tries above.

    The error refers to an internal TCL command/procedure intransparent to the user. I thus dont know what the error is.


    Originally posted in cdnusers.org by sporadic crash
Reply
  • archive

    Hi grasshopper,

    The flow is stable and we are pretty confident that only and only one elab occurs.

    That I want to retime a particular subdesign, is correct. Due to my typo, [find / -subdesign *] was stated above. No, I have used the name of the particular subdesign.

    I have tried different combinations but RTL Compiler does not like the retime attributes I set. It always gives me the same error.
    I have set the attrib, run generic synthesis -to_generic. No, I get that error.
    I havfe run generic synthesis -to_generic, I have set the attrib. The same error.
    I have set the attrib right after elab. Then directly synthesize -to_mapped. The same error.
    I am pretty sure that only one subdesign was set for the retime attrib for all tries above.

    The error refers to an internal TCL command/procedure intransparent to the user. I thus dont know what the error is.


    Originally posted in cdnusers.org by sporadic crash
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