On Wed, Jun 20, 2012 at 01:44:14PM +0100, Roland Scheidegger wrote: > A lot of code I just glossed over it, but seems to look ok other than > the (performance) implications this might have.
Actually whether there's a performance implication is not obvious. In practice the code just kicks the 4-pixel loop one or two function calls higher. This unshares some tests, some function calls, and the mip-size computation shifts. For normal texturing and on x86 the tests are correctly predicted after the first one, and so are the function calls, giving all of them a near zero cost. So I'm not sure the costs is that measurable. With the actual vectorization the llvmpipe situation may be different (not so sure with the aos texturing though). Best, OG. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
