Custom Placement of Two-Row Tall Cells #4442
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In the OpenFASoC LDO generator, a two-row tall comparator latch is custom placed using the This used to work in earlier versions of OpenROAD, but recently the CI is failing with the following error:
The custom placement is done before running the
Relevant Information:
Is there a way to place this cell (not as a macro) without placement violations? cc: @msaligane |
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Replies: 3 comments 5 replies
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Have you tried marking the cells as |
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We have recently being doing work related to multi-height cells. The error indicates that the detailed placer is trying to legalize this instance which is sounds like you don't want. FIRM should work for that purpose. Can you provide a test case? |
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Your other option is to provide double height site rows. |
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You would need a corresponding site. You would set PLACE_SITE to a list of your regular and double height site.