Hyper-Retiming, How to disable it in the .qsf?

Hi Alex,

Below are the updates from engineering team:

The retimer is working as expected when you enable the ASIC_PROTOTYPING_FEATURES setting. This setting only affects the retime stage runtime by disabling register retiming and it doesn't skip the whole retime stage.

(1) The info messages are a bug and they plan to change the messages in a future version of Quartus (I legally cannot disclose which version as that is confidential information). For now, you may ignore the messages, the retimer is working just fine when you enable the ASIC_PROTOTYPING_FEATURES setting.

(2) With regards to the retime stage runtime- when using ASIC_PROTOTYPING_FEATURES setting, it only marks all registers as non-retimeable but doesn't actually skip retime stage, so seeing some time spent here is expected. The flow is that the retimer will get loaded then exit with a no-op, so it will take a small amount of runtime.

If you are seeing significant amount of runtime at retime stage, we require you to send your design. Because we do not see this problem from our end and there are many factors that can contribute to this- machine environment, qsf settings, etc.

Regards,

Nurina