This subdirectory contains Agner Fog's vectorclass2 library
version 2.02.00 (commit 08959ebe6ea5d8317330b242e28ba0d2938ac52f, Aug 7 2022),
available at

https://github.com/vectorclass/version2/releases

These are used for the HILA AVX2 and AVX512 targets.

The vectorclass2 library is included here verbatim, all files are
unmodified (excepting this file, of course).  We are not using git submodule
in order to simplify distribution.  These files are naturally distributed under
the original Apache 2.0 licence.
