Multi-voltage floorplan design with optimal voltage assignment

Qian, Zaichen; Young, Evangeline F. Y.

doi:10.1145/1514932.1514937

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…The definition is the same as that defined by [16]. Table VII shows that our results are 16.8%, 18.6%, 16.4%, and 10.1% better than PN-FP [16], [23], [37], and VOBB [38], respectively. Since other works only encourage blocks of the same voltages placed in neighboring locations without giving restrict constraints, our approach can consume less power-network resource than others because the blocks of the same supply voltage are clustered into one region.…”

Section: B Comparison Of Voltage Island Floorplanningmentioning

confidence: 85%

“…According to the design stage which the technique is applied to, we can classify them into two categories such as those targeted on the floorplanning/placement stage [10], [11], [16], [23], [29], [38] and the others focused on the post-floorplanning/placement stage [5], [17], [24], [34], and [35]. Our work focuses on the floorplanning/placement stage since a good quality MSV floorplan can reduce the further complication of physical layout and power optimization, which have to be considered in the post-floorplanning/placement stage.…”

Section: B Voltage-island Driven Floorplanningmentioning

confidence: 99%

“…Finally, we compared the power-network routing resource required by SKB-tree-based method with other approaches [16], [23], [37], and VOBB [38]. For the cost of the power-network resource, we use the equation to measure it, where is the half perimeter wirelength of the bounding box in .…”

Section: B Comparison Of Voltage Island Floorplanningmentioning

confidence: 99%

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SKB-Tree: A Fixed-Outline Driven Representation for Modern Floorplanning Problems

Lin

Hung

2012

IEEE Trans. VLSI Syst.

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In this paper, we propose an SKB-tree representation for two modern floorplaning problems: fixed-outline and voltageisland driven floorplanning. Since SKB-tree can dynamically allocate regions for blocks so that all blocks can be placed into a specific outline for each solution, it is a suitable representation for dealing with the fixed-outline constraint. Due to this good property, we also use it to deal with the voltage-island driven floorplanning. Different from previous works, we constrain blocks of the same voltage to be placed into one region to save power routing resource, simplify power planning, and reduce IR Drop. Experimental results show the feasibility of SKB-tree. For the fixed-outline constraint with zero deadspace, SKB-tree achieved significantly better wirelength than A-FP, Parquet 4.0, ZDS, and SAFFOA. SKB-tree can get better results than other fixed-outline driven floorplanners because it only needs to focus on wirelength optimization during simulated annealing. Besides, for voltage island driven floorplanning, SKB-tree also consumes less power and wirelength.Index Terms-Fixed-outline, floorplanning, multiple supply voltage, voltage island.

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