It is possible to define user callable functions which are recognized in
the mathematical formulae evaluations, using subroutine ` SIC_DEF_FUNC` as follows

CALL SIC_DEF_FUNC(NAME,SF,DF,NARG,ERROR) where NAME is the function name SF is the address of the single precision implementation of the function DF is the address of the double precision implementation of the function NARG is the number of arguments of the function. ERROR is an error flagBoth single and Double precision routines will be called like as (e.g. for two arguments)

S = SF(arg1,arg2) and D = DF(arg1,arg2)

Gildas manager 2014-07-01