Performance Evaluation of an Efficient Double-Double BLAS1 Function With Error-Free Transformation and its Application to Explicit Extrapolation Methods

Error-free transformation (EFT) has been recently applied to solve ill-conditioned problems. This transformation can reduce the number of arithmetic operations required compared to multiple precision arithmetic. In this study, we implement double-double (DD) BLAS1 functions with EFT and propose the application of the approach to explicit extrapolation methods for solving initial value problems of ordinary differential equations (ODEs). The presented routines can be effective for a large system of linear ODEs, especially when a harmonic sequence is used.