Subject: Re: ARM9 Endian mode
To: Snorlax <firstname.lastname@example.org>
From: Richard Earnshaw <email@example.com>
Date: 01/27/2004 10:00:53
> Is there in relation to Big/Little endian mode any performance penalties =
> on a ARM920T core?
> I noticed that on some of the Intel XScale processors only Big endian =
> mode is allowed, so I figure the dual compatible endian mode processors =
> has to do some conversion internally in one of the modes not native to =
> the execution unit.
For the core there are no performance penalties. However, ARM chips often
appear as part of a larger ASIC and peripherals in that ASIC may be
restricted to one Endian configuration.