Cannot find clock gating cell in ASAP7 VLSI flow

[임기엽]

Hi, i got some error at the synthesis

I cannot compile liberty file of asap7sc7p5t_27 at Library_compiler , so I'm trying to use asap7sc7p5t_28.

But when I synthesise  asap7sc7p5t_28 then Genus cannot find clock gating cell

  Clock gating cell 'ICGx1_ASAP7_75t_R' does not contain gated clock function.
  Clock gating cell 'ICGx2_ASAP7_75t_R' does not contain gated clock function.
  Clock gating cell 'ICGx2p67DC_ASAP7_75t_R' does not contain gated clock function.
  Clock gating cell 'ICGx3_ASAP7_75t_R' does not contain gated clock function.
  Clock gating cell 'ICGx4DC_ASAP7_75t_R' does not contain gated clock function.
  Clock gating cell 'ICGx4_ASAP7_75t_R' does not contain gated clock function.

How can I fix it?

If without clock_gating then it passed, but I need clock_gating option

[Harrison Liew]

Hi,

This is a known issue for asap7 v28 library. Our effort to update Hammer to support v28 was orphaned. However, there is an old PR and discussion here:  update asap7 std cell library version 28 by Waxpple · Pull Request #673 · ucb-bar/hammer (github.com) that you can likely try to adapt to current Hammer. We would appreciate an update to that PR if you manage to figure it out.

Best,

Harrison

[임기엽]

Hi, I guess fix_icg_libs has some problems

https://github.com/ucb-bar/hammer/blob/46b4e7525d8050904ad71786c57a2593976592a2/hammer/technology/asap7/__init__.py#L175C16-L175C16

asap7sc7p5t_28 is already modified, but hammer edit once more, so ICG libs in /tech-asap7-cache directory cause error

I'm in synthesis, so I will check tomorrow

2023년 8월 31일 목요일 오전 8시 47분 14초 UTC+9에 harris...@berkeley.edu님이 작성: