nvchai opened a new pull request #15044: [WIP] Added fused slice sum operator
URL: https://github.com/apache/incubator-mxnet/pull/15044
 
 
   ## Description ##
   This PR adds a fused slice sum operator that fuses the slice operation with 
a sum operation. The code is a work in progress as it only implements the 
forward op for now and includes a dummy backward op implementation. When the 
slice_sum operator is used for half precision tensors, it is required that the 
last dimension be a multiple of 2 in order to use the vectorized half type. 
   
   ## Checklist ##
   ### Essentials ###
   Please feel free to remove inapplicable items for your PR.
   - [ ] Changes are complete (i.e. I finished coding on this PR)
   - [x] All changes have test coverage:
   - [ ] Code is well-documented: 
   - [x] To the my best knowledge, examples are either not affected by this 
change, or have been fixed to be compatible with this change
   

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