YUV422 extension (or shader?)

Hi,

I’ve got a GTX680 which has a lot of extension: https://gist.github.com/roxlu/390c6f634063d9b35f3a
but from that list I don’t see any which name represents a yuv422 one. Does someone knows if there is a
nvidia specific YUV422 extension?

I do have a shader which can handle YUV422, though it needs to check for even/odd texture coordinates which isn’t a perfect solution; wasting GPU cycles.

Thanks
roxlu