ddfun

Double-double package with special functions

DDFUN: A double-double package with special functions (approximately 30 digit precision). This package permits one to perform floating-point computations (real and complex) to double-double precision (approximately 30 digits), by making only relatively minor changes to existing Fortran programs. It is intended as a substitute for IEEE 128-bit quad precision on systems where quad precision is not available. All basic arithmetic operations and transcendental functions are supported, together with numerous special functions. The package should run correctly on any Unix-based system supporting a Fortran-2008 compiler and IEEE 64-bit floating-point arithmetic.