[XviD-devel] [RFC] AMD64 support

[Andrew Dunstan]

>So the question is:
>  - Do i dumbly include all asm code port or,
>  - Do i include only meaningfull functions (mostly xmm functions which
>    perform far better than sse2, and are more accurate than their mmx
>    cousins for MPEG quant)

Not sure if you consider this relevant, but the x86-64 version of windows 
only supports SSE and SSE2 instructions using the XMM registers so all 
functions need to be 128-bit. Also from what I can gather windows uses 
different registers to pass function parameters from those used in linux.