A Fortran Multiple-Precision Arithmetic Package
Richard P. Brent · ACM Transactions on Mathematical Software · 1978
A collection of ANSI Standard Fortran subroutines for performing multiple-precision floatingpoint arithmetic and evaluating elementary and special functions is described.The subroutines are machine independent and the precision is arbitrary, subject to storage limitations.The design of the package is discussed, some of the algomthms are described, and test results are given.