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Re: iWMMXt/Linux EABI toolchain
On Wednesday 01 March 2006 05:05, Daniel Jacobowitz wrote:
> On Wed, Mar 01, 2006 at 04:57:03AM +0000, Steven Newbury wrote:
> > Thanks for the quick response!
> > I'm sure it seems I like to make hard wok for myself! It gets worse, I'm
> > porting Gentoo Linux to iWMMXt with pure EABI kernel and userspace. I'm
> > not concerned about being able to run old binaries. So is using
> > abi=iwmmxt really not what I want? A really bad idea?
>
> Absolutely. You want the AAPCS, not Intel's pre-AAPCS ABI.
Actually, -mabi=iwmmxt is AAPCS based. It's diffferent from the old intel
iwmmxt ABI.
Having said that, it probably hasn't been tested particularly well, and I
wouldn't advise using it unless you really need it (ie. you know you have
performace sensitive code that makes extensive use of iWMMXt vector types in
function arguments).
Paul