Re: kernel bitreverse function

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Sat, Apr 02, 2011 at 11:11:39PM +0200, Frank Wille wrote:
> is there already a global function to reverse the bits in a byte?

I don't think so.

> If not, wouldn't it be useful to put an optimized function (e.g. with
> a 256-byte lookup-table, or 16-byte for the two nibbles to save space)
> into the kernel, or into libkern?

Depending on the platform, one of the approaches from
http://graphics.stanford.edu/~seander/bithacks.html#BitReverseTable
makes sense.

Joerg