Results 4 comments of Chao Liu

Sorry, accidentally closed it.

@poyenc If you see any issue with the coding, please add them in the description above. I will fix them in a major refactor PR

@illsilin Could you evaluate the applicability of @rosenrodt 's suggestion?

more specifically, we should have a single device operation class that support 1D~5D tensor elementwise operation, instead of 5 device operation classes.