On Mon, Aug 16, 2010 at 4:53 PM, Luca Barbieri <l...@luca-barbieri.com> wrote: >> IIRC, the vertex fetch constants for r6xx+ accept 0 stride. > > But does the hardware fetch the same value repeatedly, wasting memory > bandwidth, or is it smart enough to fetch it once and store it? > (question applies to both r300-r500 and r600-eg) > > In other words, is it necessary to rewrite shaders and pass constant > elements in constant buffers for optimal performance, or are there > other ways? >
I'm pretty sure it just fetches it repeatedly. I don't remember the fetch details on r300. I suspect using constants would be better performance-wise. Alex _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
