请问大家有没有碰到过综合后还有assign语句残留的问题

yilan77

同上问 需要解决吗 对STA及后端工作有没有影响

yifan225

DC里面有一个命令可以去掉综合后还有assign的
我不是很清楚啦
你可以资料找找
或者明天我去办公室看看后给你说说

robberxiong

必须消除这些语句，不然后面的DFT等没法做的。
出现这种情况一般有两种可能：
1. 综合中出现错误。要仔细查看log file文件，查看error和warning信息。
2. 综合设置没有设置好关于处理asign语句的设置。

francisus

You have to remove all the "assign" statements. Assignments cause place * route to run into infinite loops because router cannot differentiate different names of the same physical wires.
To remove assign in Design compiler, use "set_fix_multiple_port_nets -all -buffer_constants".

chamot

Sometimes you can not remove by setting "set_fix_multiple_port_nets -all -buffer_constants".
Sometimes the problem can be solved by compiling with
1). Compile-ultra
2). upgroup option
3). Set tight timing to the clock cycle (i.e. slack ~ 0)
Hope that helps

atuhappy

set_fix_multiple_port_nets -all -buffer_constants
综合后可能还会有assign，我是手工修改网表解决的

yuanpin318

Feedthrough can also cause same issue.
I remember you need to set one attribute in DC.

lrl5473

看不动

enjoy545352

francisus 发表于 2005-9-7 10:20
You have to remove all the "assign" statements. Assignments cause place * route to run into infinit ...

thanks for sharing