This directory contains high-precision code for evaluating
certain functions. The code can be used
- for verification of standard double-accuracy code,
- for generating reference values in tests, and
- for deriving coefficients in polynomial expansions.

For background, see
- forthcoming paper by Wuttke and Kleinsorge, available
  upon request, and
- software project PPAPP, https://jugit.fz-juelich.de/mlz/ppapp,
  in particular R/userManual/userManual.pdf.

The code in the present directory is meant to be compiled
from a ppapp/build directory, using ppapp/CMakeLists.txt,
as described in the PPAPP user manual, Sect 2.1.
