AVX generic mode tuning discussion.

[Richard Henderson]

On 07/12/2011 02:22 PM, harsha.jagasia@amd.com wrote:
> We would like to propose changing AVX generic mode tuning to generate 128-bit
> AVX instead of 256-bit AVX.

You indicate a 3% reduction on bulldozer with avx256.
How does avx128 compare to -mno-avx -msse4.2?
Will the next AMD generation have a useable avx256?

I'm not keen on the idea of generic mode being tune
for a single processor revision that maybe shouldn't
actually be using avx at all.


r~