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Re: [PATCH] Optimize MIPS memcpy

On Mon, Oct 15, 2012 at 1:34 PM, Steve Ellcey <sellcey@mips.com> wrote:
> On Mon, 2012-10-15 at 13:20 -0700, Andrew Pinski wrote:
>
>> On:
>> system type             : EBB6300 (CN6335p2.1-1500-AAP)
>> processor               : 0
>> cpu model               : Cavium Octeon II V0.9
>>
>> I get:
>> ...
>> 0x200757cb, (no zeros)
>> 0x200757cc, (no zeros)
>> 0x200757cd, (no zeros)
>> 0x200757ce, (no zeros)
>> 0x200757cf, (0x20075780 to 0x20075800, 128 byte prefetch)
>>
>> Thanks,
>> Andrew Pinski
>
> Andrew,
>
> Is there a macro I can/should use when building glibc/memcpy to know
> that it should assume a Cavium Octeon with 128 byte prefetch instead of
> the 32 byte prefetch?


Building you could use __OCTEON__ but that does not change the fact
you could build glibc for the standard mips32/mips64 and then not get
a working glibc if it defaults to 32bytes prefetch.

Thanks,
Andrew Pinski

>
> Steve Ellcey
> sellcey@mips.com
>
>
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