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Fastpath on signed short (16bit) images

Question asked by thesmileman on Apr 23, 2012
Latest reply on Apr 26, 2012 by thesmileman

According to the programming guide "OpenCL read-only images always use FastPath" but it also says you cannot use the fastpath unless you are using 32bit datatypes. This seems to be a conflict for images which are shorts. I would think a test would tell me what would happen but reading and writing to a single channel CL_R signed short opencl image gives me 25% utlization which doesn't make any sense to me because I would have thought 50% if reads were using the fastpath and writes were not, or 0% if non were using them.


Can anyone clarify this (hopefully from AMD).