A New Hardware/Software Partitioning Algorithm for DSP Processor Cores with Two Types of Register Files

Nozomu TOGAWA  Takashi SAKURAI  Masao YANAGISAWA  Tatsuo OHTSUKI  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E84-A   No.11   pp.2802-2807
Publication Date: 2001/11/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on VLSI Design and CAD Algorithms)
Category: Hardware/Software Codesign
Keyword: 
hardware/software cosynthesis,  hardware/software partitioning,  digital signal processor (DSP),  register file,  hardware unit,  

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Summary: 
This letter proposes a hardware/software partitioning algorithm for digital signal processor cores with two register files. Given a compiled assembly code and a timing constraint of execution time, the proposed algorithm generates a processor core configuration with a new assembly code running on the generated processor core. The proposed algorithm considers two register files and determines the number of registers in each of register files. Moreover the algorithm considers two or more types of functional units for each arithmetic or logical operation and assigns functional units with small area to a processor core without causing performance penalty. A generated processor core will have small area compared with processor cores which have a single register file or those which consider only one type of functional units for each operation. The experimental results demonstrate the effectiveness and efficiency of the proposed algorithm.