If the language doesn't already support it (not sure myself, never needed to use it before directly in HDL) then a simple little function should do the trick. You could keep dividing the parameter by ten and reassembling the digits until the value is less than 1.
Normally when I need such a thing it's in a SOPC Builder/Qsys component and I handle this sort of thing in .tcl and hand off the integer number to the HDL.
