[Bug 734043] videoconvert: add Orc optimization for I420 to BGRA for x86 [32 bit]

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734043
  GStreamer | gst-plugins-base | 1.4.0

--- Comment #6 from Edward Hervey <bilboed at bilboed.com> 2014-11-13 07:11:06 UTC ---
So there are two ways to fix this:
1) Implement orc code that doesn't use too many registers (so it works on
architectures with less registers than x86-64)
2) Implement register spilling in orc (i.e. use memory when we exceed the
available number of available registers).

I'm not 100% sure we can achieve the same quality/speed results with 1) accross
all platforms. Maybe wim has some feedback on this.

2) doesn't seem as trivial as it seems (how do you figure out what's the
*right* register to spill into main memory).

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