An analytical placer for mixed-size 3D placement

10 years 8 months ago
An analytical placer for mixed-size 3D placement
Existing 3D placement techniques are mainly used for standardcell circuits, while mixed-size placement is needed to support highlevel functional units and intellectual property (IP) blocks. In this paper we present an analytical 3D placement method that is capable of placing mixed-size circuits. A multiple-stepsize scheme for the analytical solver is proposed to handle standard cells and macros differently for stability and efficiency. To relieve the difficulty of legalization, 3D floorplan-based initial solutions are used to guide the analytical solver. As far as we know, this is the first work that reports 3D placement results for mixed-size circuits. Our experiments show that the multiple-stepsize scheme is better than single-stepsize schemes in both quality and runtime. The experimental results on the ICCAD’04 mixed-size benchmarks show that the 4-tier 3D mixed-size placement can reduce the wirelength by 27% on average compared to 2D placement. The results also show that the 3D ...
Jason Cong, Guojie Luo
Added 17 May 2010
Updated 17 May 2010
Type Conference
Year 2010
Where ISPD
Authors Jason Cong, Guojie Luo
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