I have an exponent and mantissa of the float.
How do I figure out that the float is very, very close, almost exact of is round value i.e. I want to find out all values like: 6100, -450, 20, 6100.xx

At first I've used brainlet way to just check if exponenta is < 139 but that quickly turned out to be mistake.
So I need to somehow determine if based on both, e and m

Any simple ways exist without deconstructing whole thing with something like Dragon4 or whatever, I dont have brain capacity for all that jazz