Title :
Comments on "An architecture for addition and subtraction of long word length numbers in the logarithmic number system" by D.M. Lewis
Author :
Arnold, Martin ; Bailey, T. ; Cowles, J.
Author_Institution :
Dept. of Comput. Sci., Wyoming Univ., Laramie, WY, USA
fDate :
6/1/1992 12:00:00 AM
Abstract :
D.M. Lewis (ibid., vol.39, no.11, p.1325-36, Nov. 1990) recently described an architecture for performing addition and subtraction in the logarithmic number system using a Taylor series approximation and ROM tables. Here it is shown that a 25% improvement can be achieved in the table used to implement addition. This improvement is significant when Lewis´ technique is used to implement variations of the logarithmic number system which do not require the subtraction logarithm.<>
Keywords :
digital arithmetic; table lookup; ROM tables; Taylor series approximation; addition; logarithmic number system; subtraction; Adders; Circuits; Computer science; Digital arithmetic; Hardware; Linear approximation; Read only memory; Taylor series;
Journal_Title :
Computers, IEEE Transactions on
