Intel® Software Network

Can someone post an example of how to write an accumlate (for eight 32bit regs) using the vector instructions in AVX?

It would be best if the code could be written with gcc (extensions are ok).

You would require the ix86/avx branch of gcc 4.4 http://www.gnu.org/software/gcc/svn.html  AVX support presumably is mainly floating point; ideally, a float sum reduction in C should work with -ffast-math (doubt if it is so yet).