[PATCH] Compile AVX libm functions with -mavx -mprefer-avx128

[Matt Turner]

On Thu, Oct 4, 2012 at 6:56 AM, Dmitrieva Liubov
<liubov.dmitrieva@gmail.com> wrote:
> We will check performance on unit tests for each affected function separately.
> I guess unit tests are good benchmark here.

I don't think so. The change prevents the stalls caused by switching
between 256-bit AVX and legacy SSE instructions, so just running these
functions won't tell you anything.

Maybe running these functions with a single legacy SSE instruction
added to the end will get the results you want?