Messages in this thread | | | Date | Wed, 20 Dec 2017 17:00:01 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v10 1/3] lib: Add strongly typed 64bit int_sqrt |
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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.
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