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From: Tom H. <to...@co...> - 2005-06-22 13:05:35
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In message <170...@ca...>
Paul Mackerras <pa...@sa...> wrote:
> Julian Seward writes:
>
>> * hardware_capabilities. Hmm. What's that used for? Is there
>> any significance to the fact that neither the x86 nor amd64
>> code read that auxv entry?
>
> That's mainly used to tell whether we have altivec or not. I assume
> x86 and amd64 use cpuid to tell whether they have mmx/sse/sse2 etc.
I believe that x86 systems use it to decide which libraries to use
if there is more than one choice - so an i686 library will be
preferred over a standard i386 one if the processor can handle it.
Tom
--
Tom Hughes (to...@co...)
http://www.compton.nu/
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