Intel® oneAPI Math Kernel Library Developer Reference - Fortran
This section describes service routines for obtaining properties of the previously registered basic generators (vslGetBrngProperties). See VS Notes ("Basic Generators" section of VS Structure chapter) for substantiation of the need for several basic generators including user-defined BRNGs.
The vslRegisterBrng function is provided in C for registering a user-defined basic generator, but it is not supported for Fortran. If you need to use a user-defined generator in Fortran, use an abstract basic random generator and abstract stream as described in the VS Notes.