m256 missing from <xmmintrin.h>

[olivaE]

Hello everyone,

I'm not sure I should be asking for this here or in apple or intel forums,
but anyway, I have a mac book intel core duo and I'm running mac os 10.6.7.
I have xcode 3.2.6 and the default compiler is gcc 4.2, and it's the last
version of gcc supported in xcode yet. I lately started to use intel SSE for
some linear algebra routines and I would like to use _m256 type but I
couldn't find it in the xmmintrin.h header, is this because It's not
supported by the hardware , I bought my mac on 2007, or I just have to
update the intel SSE headers.

thanks for all   
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