GitLab

* optimizations of spmm for CPU

* Added names of contributors

* Minor code cleanup

* Moved the spmm optimization code to a new header file

* Moved to DGL's logging method

* removed duplicate code between SpMMSumCsr and SpMMCmpCsr

* Changes made to follow Google coding style

* Fixed lint errors in spmm.h

* Fixed some lint errors from spmm_blocking_libxsmm.h

* Fixed lint errors from spmm_blocking_libxsmm.h

* Added comments to SpMMCreateLibxsmmKernel

* to enable building of tests, and other cosmetic changes

* disabling libxsmm on windows

* Put a condition to avoid opt impl for FP64 as libxsmm does not have FP64 support yet

* cosmetic changes and documentation

* cosmetic changes

* to pass lint tests

* replaced multiple allocations for buffers of indices and edges with a single allocation
Co-authored-by: Minjie Wang <wmjlyjemaine@gmail.com>