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* add two operators ceil and floor

* clang format

* add unit test for the ceil and floor operators

* remove unintended code

* first version of refactoring reduce operators.

* clang format

* refactor the gpu implemantation of the reduce_mean operator

* clang format

* refactor gpu implementation of the resuce_sum operator

* fix cpp check error

* fix cppcheck error

* fix cppcheck error

* fix review comments

* clang format

* fix a jenkin error

* fixed review comments

* clang format

* fix review comments

* clang format

* fix review comments

* clang format

* add implemenation of reduce_min and reduce_max

* clang format

* add unit test for reduce_min/max operator

* clang format

* add more unit tests

* clang format

* fix review comments

* Remove extra copy in gemm

* combine rocblas gemm call

* clang format

* fix a bug in calling rocblas function

* clang format'

* backup of temporary changes

* clang format

* unify the gemm call to avoid multiple gpu implemantation

* clang format

* remove unnecessary code

* backup temp changes

* clang format

* fix cppcheck error

* code backup

* clang format

* remove unnecessary synchronization function

* clang format

* fix bugs

* clang format

* more optimization related to gemm

* clang format

* code cleanup

* implementation that can achieves better performance

* clang format

* temp changes to try performance

* clang format

* revert to previous commits

* fixed review comments

* clang format

* fix review comments

fake up to make the int8_convolution outputs the int32_t data type. With MIOpen to support int32_t output shape, this tmp change will be removed.