Hello,

I have added some examples for these (where `d` is double and `f` is float):

#x1.921fb54442d18pd+1 	≈ π
#x1.921fb54442d18pf+1 	= #x1.921fb6pf+1 ≈ π
#xxxxxx@1p6 	xxxxxx@64 ≈ 12.539+29.440i

-- Peter McGoron