5 minutes of Googling didn't return any image of either skylake or 12 die shots with labelled predictors. Do you have any pointers?
Also I know nothing about the details, but I expect that most of the predictor consists of CAM memory used to store the historical information. I doubt that without internal knoledge, is it possible to distinguish it reliably from other internal memories.
CAM is expensive and requires some kind of replacement scheduling logic. I believe that branch predictors are still implemented as straight one-way associative RAM, often even without any kind of tagging and only true CAM in the CPU core is TLB.
Also I know nothing about the details, but I expect that most of the predictor consists of CAM memory used to store the historical information. I doubt that without internal knoledge, is it possible to distinguish it reliably from other internal memories.