An automatic hardware generator for special arithmetic functions using various ROM-based approximation approaches

In this paper we develop an automatic generator to produce hardware units that compute various single-value functions using table-method approaches and compare their performance and area costs with other alternative implementations. Experimental results show that making choices between these approaches depends on the tradeoffs between speed, area and especially the required output precision. In particular, the proposed hardware function units produced have better delay and/or area cost compared with those available from Synopsys DesignWare library, a popular commercial library for generating various arithmetic units.