RFR: 8234331: Add robust and optimized utility for rounding up to next power of two+

[John Rose]

On Nov 28, 2019, at 1:02 PM, Claes Redestad <claes.redestad at oracle.com> wrote:
> 
> I just want to point out that the "round up to power of 2"
> implementations I've seen seem prone to the same kind of overflows as a
> next up would, just not for exactly the same set of inputs.

Thanks; I stand corrected.