[Mesa-dev] [PATCH] r600g: adjust QUANT_MODE for higher precision

[Andy Furniss]

Vadim Girlin wrote:
> Use 1/256 for R6xx/7xx, 1/4096 for evergreen, instead of default 1/16.
>
> Helps to pass some piglit tests (fbo, multisample).

It also fixes the worse inaccuracies seen when using vdpau mpeg2 decode 
on my rv790. It's still not as accurate as s/w, but the remaining errors 
maybe a separate (chroma) issue.