[Ffmpeg-devel] [RFC] port cabac asm to AMD64
Sat Oct 21 23:33:00 CEST 2006
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
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