amd64 arch and sse optimization

[Fabian Greffrath]

Am Montag, den 03.02.2014, 22:45 +0100 schrieb Jaromír Mikeš: 
> Used flags -mmmx -msse -mfpmath=sse
> Improvement in performance wasn't so huge ... it was about 15% ...
> sorry for my bad memory.  

Are you sure this was on amd64, not on i386? Also, it would be
intersting to know which compiler that was.

As Reinhard already pointed out, explicitely telling the compiler that
it may use SSE instructions on amd64 shouldn't make any difference.

- Fabian