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The analog placement algorithm Plantage, presented in this paper, generates placements for analog circuits with comprehensive placement constraints. Plantage is based on a hierarchically bounded enumeration of basic building blocks, using B*-trees. The practically relevant solution space is thereby enumerated quasi-complete. The sets of possible placements of the basic building blocks are represented...
The force-directed quadratic placer ldquoKraftwerk2,rdquo as described in this paper, is based on two main concepts. First, the force that is necessary to distribute the modules on the chip is separated into the following two components: a hold force and a move force. Both components are implemented in a systematic manner. Consequently, Kraftwerk2 converges such that the module overlap is reduced...
This paper presents a fast and accurate routing demand estimation called RUDY and its efficient integration in a force-directed quadratic placer to optimize placements for routability. RUDY is based on a rectangular uniform wire density per net and accurately models the routing demand of a circuit as determined by the wire distribution after final routing. Unlike published routing demand estimation,...
This paper presents a robust quadratic placement approach, which offers both high-quality placements and excellent computational efficiency. The additional force which distributes the modules on the chip in force-directed quadratic placement is separated into two forces: hold force and move force. Both of these forces are determined without any heuristics. Based on this novel systematic force implementation,...
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