ASSET_A_411:  Generic Math Functions
     This is an implementation of the generic_elementary_functions package 
specified by the ISO Numerics Rapporteur Group, as well as of 
generic_primitive_functions, generic_algebraic_functions, and math_constants.  
As with most software, this carries no guarantees.  Single precision and double 
precision have been pretty well tested on an Apollo (Alsys) and a VAX (DEC).
Longest_Float precision is mostly finished, but rough.  This will also compile 
on VAX/Unix (Verdix), Apollo/SR10.2 (Verdix) and somewhere or other (Telesoft).
Verdix Ada on Apollo trashes the functions round and "**", because of a 
compiler bug.