Vibrant 1.5

[#ponce]

> 
> Actually, I don't see any functions which are faster than std.math. 
> std.math.exp2() is *much* faster than common.pow2() (one slow 
> instruction, vs five!!!) And exp2 sets the flags correctly.
> expi() is faster than sincos().
> 

I wrote that years ago because Pascal didn't have those ;)
I refused to use std.math function because they were taking a real argument. is that optimized ?

I've strong NIH syndrom. ;)