[x264-devel] x264-devel Digest, Vol 56, Issue 5

[Loren Merritt]

On Mon, 9 Jan 2012, haibo_xie wrote:

> How to measure the AMD bulldozer XOP/FMA4 instruction's impact to x264 performance?
> Want to know the version/branch before and after XOP adoption and give a brief comparison on my FX8150.

We didn't add XOP all at once, so any comparison of different versions
will mix in unrelated changes.

Instead, compare the same build of x264 with
--asm avx,ssemisalign,lzcnt,xop,fma4
vs
--asm avx,ssemisalign,lzcnt

--Loren Merritt