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IEICE TRANSACTIONS on Fundamentals

A New Approach for Datapath Synthesis of Application Specific Instruction Processor

Kyung-Sik JANG, Hiroaki KUNIEDA

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Summary :

In this paper, a systematic method which synthesizes the datapath of Application Specific Instruction Processor (ASIP) is proposed. The behavioral description of application is written in instruction code defined on abstract machine. We introduce register transfer graph (RTG) to represent instructions and synthesis constraint tree to select the combinations of synthesis constraints to explore design space along area and performance axis. The high performance is achieved by scheduling micro-operations of instruction in out-of-order. The practical datapath is synthesized by considering connection geometry as well as the maximum utilization of hardware resources. To reduce connection cost, data transfer paths are minimized by replacing an inefficient data transfer path with its bypass route. The feasibility of the proposed synthesis method is verified with several experimental instruction sequences.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E80-A No.8 pp.1478-1488
Publication Date
1997/08/25
Publicized
Online ISSN
DOI
Type of Manuscript
Category
VLSI Design Technology and CAD

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