发明授权
US08418113B1 Consideration of local routing and pin access during VLSI global routing
失效
在VLSI全局路由期间考虑本地路由和引脚接入
- 专利标题: Consideration of local routing and pin access during VLSI global routing
- 专利标题(中): 在VLSI全局路由期间考虑本地路由和引脚接入
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申请号: US13252067申请日: 2011-10-03
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公开(公告)号: US08418113B1公开(公告)日: 2013-04-09
- 发明人: Charles J. Alpert , Zhuo Li , Chin Ngai Sze , Yaoguang Wei
- 申请人: Charles J. Alpert , Zhuo Li , Chin Ngai Sze , Yaoguang Wei
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理商 Dwayne Nelson; Jack V. Musgrove
- 主分类号: G06F17/50
- IPC分类号: G06F17/50
摘要:
Global routing and congestion evaluation is enhanced by including consideration of local routing and pin access. Pin information is computed for each global edge based on adjacent tiles, and the wiring track capacity for an edge is reduced based on the pin information. After global routing, the wiring track capacities are increased by previous reduction amounts for detailed routing. The pin information can include pin count for an associated tile, the Steiner tree length for the pins, or relative locations of the pins. Wiring track capacities are preferably reduced by creating blockages in tracks of a particular metal layer of the circuit design used for logic gates of the pins. The blockage tracks can be spread evenly across the wiring tracks of a given edge.
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