[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: PPC/PPC64 disabled in Koji for dist-f13



John Reiser <jreiser bitwagon com> writes:

> The IXP4xx networking engine operates big endian only.  Nevertheless
> many NSLU2 machines run little-endian and still use that networking
> hardware.

With a performance penalty since all buffers have to be swapped.

> Little-
> endian operation of the CPU offers the advantage that an unaligned
> fetch from memory gives results that are usable after quick fixup.
> An unaligned fetch in big-endian mode essentially gives junk.

Both BE and LE obviously have advantages and disadvantages.
-- 
Krzysztof Halasa


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]