496 /* NOTE: unlike all other standard functions, the arithmetic based (extensible) functions

   497  *       (ADD, MUL, AND, OR, XOR) have several implementations:

   498  *        - 8 optimized versions for when the functon is called with 1 to 8 INput parameters

   499  *        - an extra non-optimized version for every other case. 

   500  *       

   501  *       This means that instead of the functions usually named 

   502  *           ADD_TTTT() 

   503  *           ADD__TTTT__TTTT()        (where TTTT is a type, e.g. INT)

   504  *       we have instead

   505  *           ADD_TTTT1(),  ADD_TTTT2(), ... ,ADD_TTTT8()

   506  *           ADD_TTTTX()              

   507  *           ADD_TTTT_VAR()           

   508  *           ADD__TTTT__TTTT1(), ..., ADD__TTTT__TTTT8()       

   509  *           ADD__TTTT__TTTT_VAR()    

   510  *       

   511  *       The standard names

   512  *           ADD_TTTT() 

   513  *           ADD__TTTT__TTTT()

   514  *       are instead later (in this .h file) declared as macros, which will choose

   515  *       at compilation time the correct version/implementation to call

   516  *       based on the number of input parameters in that specific call.

   517  */