On Wed, Sep 17, 2008 at 07:21:23PM +0100, Maciej W. Rozycki wrote: > > > Hmm, what's the purpose of doing the fold in csum_partial() then? > > > > Well, maybe odd-byte handling requires 16-bit holded values? > > It should be enough to swap odd and even bytes in the word in the > unaligned path. Though perhaps extra code to do masking would make it no > shorter/faster than what we have now; however the aligned path would > benefit. Hmm... Which is a truely weird operation - but MIPS R2 happens to have a wonderful instruction for this operation, WSBH / DSBH. Ralf
