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Implementation of four common functions on an LNS co-processor

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3 Author(s)
Das, D. ; Electron. Unit, Indian Stat. Inst., Calcutta, India ; Mukhopadhyaya, K. ; Sinha, B.P.

We propose a scheme for evaluating four commonly used functions namely, (1) inverse trigonometric functions, (2) trigonometric functions, (3) the exponential function, and (4) the logarithmic function with the help of a logarithmic number system (LNS) processor. A novel idea of series folding has been introduced for computing the above functions, expressed in the form of infinite series. We also show that with a suitable choice of the radix for the LNS we can evaluate exponential and logarithmic functions without using any extra hardware

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Computers, IEEE Transactions on  (Volume:44 ,  Issue: 1 )