[x264-devel] [PATCH] msvc workaround against SSE2 deblocking issue

[Gabriel Bouvigne]

After digging into msdn docs and links, it appears that MSVC is aligning 
the stack on mod4 when targetting x86, and mod16 when targetting x64. As 
the SSE2 deblocking is assuming a stack aligned on 128bits, it obviously 
doesn't work when compiled/linked with msvc.

Any suggestion on how to properly deal with this issue?

*manually aligning the stack before going into the problematic assembly 
code will likely kill performance, and would require platform-specific 
assembly code (as in: only used if msvc)

*don't bother with msvc doesn't seems to be a good solution (well, at 
least for me)

*compiler-specific disabling of the problematic function (as done with 
this patch) will introduce yet another platform-specific #ifdef

Right now, my own opinion is that platform-specific disabling of those 
function would be the best choice.