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Re: _mm_store_pd/s translated to movntpd/s

On Mon, Mar 21, 2011 at 7:49 AM, Matthias Kretz
<kretz@compeng.uni-frankfurt.de> wrote:
> Hi,
>
> On Monday 21 March 2011 15:23:02 Matthias Kretz wrote:
>> I tested the GCC 4.6.0 RC on Intel systems with good success so far. Now I
>> tested on an AMD Magny-Cours using the -march=barcelona flag and gcc
>> translated _mm_store_pd/s calls in the code to streaming stores in the
>> resulting binary.
>>
>> Where does this "optimization" come from and how can I disable it? This
>> doesn't make much sense on a working set that fits into the cache...
>>
>> Is this intended behavior or a bug?
>
> Additional info: If I add -fno-prefetch-loop-arrays I get normal stores as
> expected. I don't consider this a solution, though.
>
> Regards,
> ? ? ? ?Matthias
>
> --
> Dipl.-Phys. Matthias Kretz
> http://compeng.uni-frankfurt.de/?mkretz
>

Do you mean _mm_stream_pd/s?  I think store will still take your
values to cache...

  Brian
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