[Ffmpeg-devel] [RFC] port cabac asm to AMD64

[Loren Merritt]

On Sat, 21 Oct 2006, Reimar D?ffinger wrote:

> though it should be possible to optimize further, mixing use of 64 and
> 32 bit registers is said to be quite slow.

How so? My AMD optimization manual says that you _should_ mix 32bit and 
64bit registers, because there's no penalty and the 32bit opcodes are 
smaller.
(http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/25112.PDF 
page 68)

--Loren Merritt