Extended precision with a rounding mode toward zero environment. Application to the Cell processor Online publication date: Sat, 27-Jun-2009
by Hong Diep Nguyen, Stef Graillat, Jean-Luc Lamotte
International Journal of Reliability and Safety (IJRS), Vol. 3, No. 1/2/3, 2009
Abstract: In the field of scientific computing, the exactness of the calculation is of prime importance. That leads to efforts made to increase the precision of the floating point algorithms. One of them is to increase the precision of the floating point number to double or quadruple the working precision. The building block of these efforts is the Error-Free Transformations (EFT). In this paper, we develop EFT operations in truncation rounding mode optimised for the Cell processor. They have been implemented and used in double precision library using only single precision numbers. We compare the performance of our library with the native one in double precision on vectors operations. In the best case, the performance of our library is very closed to the standard double precision implementation. The work could be easily extended to obtain quadruple precision.
Online publication date: Sat, 27-Jun-2009
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