Online computing system for octuple-precision computation with Fortran
نویسندگان
چکیده
Computations with higher than the IEEE 754 standard double-precision (about 16 significant digits) are required recently. Although there are available software routines in Fortran and C for high-precision computation, users are required to implement such routines in their own computers with detailed knowledges about them. We have constructed an user-friendly online system for octupleprecision computation. In our Web system users with no knowledges about high-precision computation can easily perform octupleprecision computations, by choosing mathematical functions with argument(s) inputted, by writing simple mathematical expression(s) or by uploading C program(s). In this paper we enhance the Web system above by adding the facility of uploading Fortran programs, which have been widely used in scientific computing. To this end we construct converter routines in two stages. Keywords—Fortran, numerical computation, octuple-precision, Web.
منابع مشابه
NAS Kernels on the Connection Machine RND-90-005
The NAS Kernel Benchmark Program is a collection of FORTRAN subroutines, or "kernels", which were chosen to be representative of the computational workload of the Numerical Aerodynamic Simulation (NAS) facility located at NASA Ames Research Center. Details of the kernels are provided in [1]. The kernels provide benchmark measures of double precision (64 bit) floating point computation rate and ...
متن کاملAn improved algorithm and a Fortran 90 module for computing the conical function fm-1/2+iτ(x)
In this paper we describe an algorithm and a Fortran 90 module (Conical) for the computation of the conical function P −1 2+iτ (x) for x > −1, m ≥ 0, τ > 0. These functions appear in the solution of Dirichlet problems for domains bounded by cones; because of this, they are involved in a large number of applications in Engineering and Physics. In the Fortran 90 module, the admissible parameter r...
متن کاملImporting Pre-packaged Software into Lisp: Experience with Arbitrary-Precision Floating-Point Numbers
We advocate the use of a Common Lisp as a central organizing environment for building scientific computing systems, based on its debugging features, interactivity, memory model, existing code-base for computer algebra and user interfaces, and its ability to dynamically load modules written in other languages. In this paper we primarily address one example of mixing pre-existing (non Lisp) code ...
متن کاملTrends in Quantum Chemistry Program Abstracts Participants December 12 – 14 , 2008 Department of Chemistry Aarhus
s Computer arithmetic and the MathCW library Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB Internet e-mail: [email protected] Salt Lake City, UT 84112-0090, USA URL: http://www.math.utah.edu/~beebe/ Abstract This talk describes the significance of specific features of integer and floating-point arithmetic for computation. It discusses the impact of the recent intro...
متن کاملH2SOLV: Fortran solver for diatomic molecules in explicitly correlated exponential basis
We present the Fortran package H2SOLV for an efficient computation of the nonrelativistic energy levels and the wave functions of diatomic twoelectron molecules within the Born-Oppenheimer approximation. The wave function is obtained as a linear combination of the explicitly correlated exponential (Ko los-Wolniewicz) functions. The computations of H2SOLV are performed within the arbitrary-preci...
متن کامل