On Mon, Jul 22, 2013 at 12:22 PM,  <srol...@vmware.com> wrote:
> From: Roland Scheidegger <srol...@vmware.com>
>
> The codeword must be unsigned (otherwise will shift in 1's from above when
> merging low/high parts so some texels decode wrong).
> This also affects gallium's util/u_format_rgtc.
> ---

Write a piglit test for this too?
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