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Well they don't need to do anything further for openCL support for Bulldozer. CPU openCL support has been available for a long time now.
As you say, AMD CPU-based CL support has been available for a while now through the AMD APP (formerly Stream) SDK...
BUT the thing is that the AMD CPU-CL implementation might need some work. I'm getting 2.5 times the performance using Apple's CPU CL on a C2D 2.53Ghz as I do when running AMD CPU CL on a Phenom II X6 1055T (2.8Ghz). Could be a difference in the CL code which I am running, but I've been led to believe that it's a difference in the optimization of the two platforms.