Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
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What's the reason rejecting register duplication?

BigHandsomeBee
771 Views

I'm trying to manually duplicate a register with the following assignment:

set_instance_assignment -name DUPLICATE_REGISTER -to *is_all_mt_veri_not_empty*

BigHandsomeBee_0-1626933826549.png

As shown in the figure, the duplication is rejected with the reason "synchronization register".

I was wondering what's the meaning of this reason? I did not find any document elaborating the reason more detailedly.

 

Thank you.

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sstrell
Honored Contributor III
756 Views

If the register was detected as one that's part of a synchronization chain between clock domains, that would prevent duplication in this way.

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3 Replies
sstrell
Honored Contributor III
757 Views

If the register was detected as one that's part of a synchronization chain between clock domains, that would prevent duplication in this way.

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SyafieqS
Moderator
720 Views

Hi Yu,


The reason mean your register is one of the synchronizer chain for CDC thus it prevent reg duplication.


SyafieqS
Moderator
700 Views

May I know if there is any update?


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