Publication: Efficient and Scalable CGRA-based Implementation of Column-wise Givens Rotation 

Authors:
Rákossy, Z. E. ,  Merchant, F. ,  Acosta Aponte, A. ,  Nandy, S. K. ,  Chattopadhyay, A.
Book Title:
25th IEEE International Conference on Application-specific Systems, Architectures and Processors
Organization:
IEEE
Address:
Zuerich, Switzerland
Date:
Jun. 2014
DOI:
10.1109/ASAP.2014.6868659
Language:
English

Abstract

Givens Rotation is a key computation-intensive block in embedded wireless applications.
In order to achieve an efficient mapping which smoothly scales to the underlying architecture, we propose two new Column-based Givens Rotation algorithms, derived from traditional Fast Givens and Square-root and Division Free Givens algorithms.
These algorithms allow annihilation of multiple elements in a column of the input matrix simultaneously, without a dependency bottle-neck allowing increased parallelism, resource sharing and scalability.
The ease of mapping and scalability has been tested on a layered coarse-grained reconfigurable architecture reaching close to optimal results for highly parallel architectures.

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