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AR# 4886

A1.5/F1.5 MAP - Map will not put two SRL16 instances into a single Virtex CLB

Description

The SRL16 symbol takes up less than half of the resources of a single
Virtex CLB, yet MAP is only able to put one SRL16 per CLB, and nothing
else. In this way, MAP uses twice as many CLBs as it should. Setting
the RLOC attribute on two SRL16 instances to the same CLB will produce
a, "fatal error... placement constraint cannot be met," error.

解决方案

This problem is fixed in the M1.5i Performance Pack Update due to begin
shipping in December 1998.
AR# 4886
创建日期 10/22/1998
Last Updated 04/19/2000
状态 Archive
Type 综合文章