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Re: [Ubuntu-loongson] Loongson 2 and 3 code in the official kernel at kernel.org (was Re: Hi and initial questions)

To: ubuntu-mips@xxxxxxxxxxxxxxxxxxx
From: LIU Qi <liuqi82@xxxxxxxxx>
Date: Fri, 31 Jul 2009 15:48:52 +0800
Cc: Siggy Brentrup <bsb@xxxxxxxxxxxxxx>
In-reply-to: <20090730214410.GH7828@keuner.winnegan.fake>
Reply-to: LIU Qi <liuqi82@xxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)

On Thu, Jul 30, 2009 at 11:44:10PM +0200, Siggy Brentrup wrote:
 > Please bear with me writing this out of lack of information:  provided
 > user space can take advantage of these loongson enhancements, why not
 > add them to gcc's repertoire: cf. info '(gccint-4.3.info)Machine Desc' ?
Many enhanced instructions, such as SIMD instructions of loongson could
not be taken advantage by gcc automatically. They will be used as the
hand-writing assemble for the best performance.
 > 
 > From the Wikipedia article on Loongson I learned that Loongson 3 will
 > have support for emulating x86 code.  Should we target in the long run
 > at installing i386 versions of packages not available for mipsel?
No. The support for emulating x86 code will be used by binary
translator. The x86 code will not run on the loongson-3 natively. So the
x86 support is not related to our ubuntu port.