_mm_store_pd/s translated to movntpd/s

[Matthias Kretz]

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