On 20 December 2017 at 17:00, Peter Zijlstra <[email protected]> wrote: > On Wed, Dec 20, 2017 at 02:39:26PM +0000, David Laight wrote: > >> With minor changes it ought to be possible to remove most of the >> 64bit arithmetic and shifts. >> >> If you care about performance then using 32 bit maths will be much faster. > > Some, u64 add/sub/shift isn't exactly expensive, but yes, I also > indicated that improvement is possible. At the very least y can be made > a u32 I suppose.
OK, is there any more easy optimizations you see?
