Maple: A Simultaneous Technology Mapping, Placement, and Global Routing Algorithm for Field-Programmable Gate Arrays

Nozomu TOGAWA  Masao SATO  Tatsuo OHTSUKI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E77-A   No.12   pp.2028-2038
Publication Date: 1994/12/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
FPGA,  look up table,  technology mapping,  layout design,  placement,  global routing,  

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Technology mapping algorithms for LUT (Look Up Table) based FPGAs have been proposed to transfer a Boolean network into logic-blocks. However, since those algorithms take no layout information into account, they do not always lead to excellent results. In this paper, a simultaneous technology mapping, placement and global routing algorithm for FPGAs, Maple, is presented. Maple is an extended version of a simultaneous placement and global routing algorithm for FPGAs, which is based on recursive partition of layout regions and block sets. Maple inherits its basic process and executes the technology mapping simultaneously in each recursive process. Therefore, the mapping can be done with the placement and global routing information. Experimental results for some benchmark circuits demonstrate its efficiency and effectiveness.