[boost] integer_mask for long long

Hi boosters, I am trying to do a small template based fixed-point arithmetic library and I am using integer_mask.hpp to extract some bit-masks I need. Everything works as expected as long as my fixed-point numbers are not larger than 32bit. I am on Intel hardware using gcc and there is long long, wich is 64bit. I would like to be able to use it together with my fixed point template, but integer_mask.hpp works only up to long. Is there a compelling reason for this? Greetings, Aki