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Issue No.04 - April (2010 vol.59)

pp: 449-456

Amirhossein Alimohammad , Ukalta Engineering, Edmonton

Saeed Fouladi Fard , Ukalta Engineering, Edmonton

Bruce F. Cockburn , University of Alberta, Edmonton

DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TC.2009.169

ABSTRACT

This paper presents a unified architecture for the compact implementation of several key elementary functions, including reciprocal, square root, and logarithm, in single-precision floating-point arithmetic. The proposed high-throughput design is based on uniform domain segmentation and curve fitting techniques. Numerically accurate least-squares regression is utilized to calculate the polynomial coefficients. The architecture is optimized by analyzing the trade-off between the size of the required memory and the precision of intermediate variables to achieve the minimum 23-bit accuracy required for single-precision floating-point representation. The efficiency of the proposed unified data path is demonstrated on a common field-programmable gate array.

INDEX TERMS

Floating-point arithmetic, single-precision arithmetic, reciprocal, square root, logarithm, computer arithmetic.

CITATION

Amirhossein Alimohammad, Saeed Fouladi Fard, Bruce F. Cockburn, "A Unified Architecture for the Accurate and High-Throughput Implementation of Six Key Elementary Functions",

*IEEE Transactions on Computers*, vol.59, no. 4, pp. 449-456, April 2010, doi:10.1109/TC.2009.169REFERENCES