Checking if an Integer is an Exact Binary Power

[David Nadlinger via Digitalmars-d]

On Sunday, 24 April 2016 at 23:00:56 UTC, Temtaime wrote:
> Please no cmp.
> Just
> bool isPowerOf2(uint x) { return x && !(x & (x - 1)); }

You do realise that this will (typically) emit a branch?

  — David