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AR# 23131

8.1i Virtex-4 PAR - Unclear message about "hybrid components" is being printed

Description

I have upgraded to version 8.1i SP2 and now I am seeing messages during placement about "hybrid components." What does this mean and what am I supposed to do about it? 

 

Release 8.1.02i - Map I.26 

Copyright (c) 1995-2005 Xilinx, Inc. All rights reserved. 

Using target part "4vlx100ff1148-10". 

Mapping design into LUTs... 

Writing file fpga_name_map.ngm... 

Running directed packing... 

Running delay-based LUT packing... 

Running timing-driven packing... 

Phase 1.1 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components 

Found a carry chain which has hybrid components

Solution

This message is an internal debug message that is being printed inadvertently. It is related to some internal processing of carry chains that contains both SLICEM and SLICEL components and the automatic adjustments that need to be made so that these carry chains can be placed successfully. The message can be considered harmless and should be ignored.  

 

This message will be removed in a future revision.

AR# 23131
Date Created 09/04/2007
Last Updated 05/20/2014
Status Archive
Type General Article