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AR# 6728

1.5i SP2 Virtex Map - Crash during map.

Description

A case has been seen where map crashes on a Virtex design in 1.5i SP2.
The problem is related to the packing of carry chains.

Solution

A work around for this case is to set the environment variable
"XVKMA_NO_CARRY_CHAIN_PACK" which disables the map stage
that leads to the crash. The workaround will cause increase in # of slices
and possibly slower timing.

The problem is fixed in version 2.1i which is set to begin shipping at the end of June.
AR# 6728
Date Created 06/10/1999
Last Updated 04/25/2000
Status Archive
Type General Article