* enhance grid_sampler cpu kernel to 5D input

* fix bug when 5D input tensor running on the cudnn kernel

* move elementwise_floordiv、elementwise_max、elementwise_max_grad XPU kernel to phi,test=kunlun

* move elementwise_min elementwise_min_grad kernels to phi,test=kunlun

* delete elementwise_min_xpu.cc,test=kunlun

* move elementwise_mod elementwise_pow XPU kernels to phi,test=kunlun

* move elementwise test=kunlun

* move add/sub/mul/div kernel to elementwise_kernel, test=kunlun

* fix ci bugs,test=kunlun

* fix ci bugs

* test=kunlun

* move clip XPU kernel to PHI,test=kunlun

* delete clip_op_xpu.cc,test=kunlun

* migrate truncated_gaussian_random kernel to phi, test=kunlun

* reuse CPU kernel, test=kunlun

* debug kernel, test=kunlun

* migrate truncated_gaussian_random kernel to phi, test=kunlun

* split truncated_normal, test=kunlun

* try fix error from CI, test=kunlun

* move label_smmoth XPU kernel to PHI,test=kunlun

* delete label_smooth_op_xpu.cc and modfied label_smooth_kernel.cc,test=kunlun

* delete add_label_smooth.cc,test=kunlun

* test=kunlun

* test=kunlun

* test=kunlun

* test=kunlun

* test=kunlun

* test=kunlun

* migrate compare op(E/NE/LE/LT/GE/GT) from fluid to phi

* fix compile error

* fix memory alloc; test=kunlun

* refine code; test=kunlun

* replace PADDLE_ENFORCE with PADDLE_ENFORCE_XDNN_SUCCESS

* [OpAttr]output_size of unpool support Tensor type

* fix coverage

* fix contain_var

* fix coverage

* Move XPU momentum to phi, test=kunlun

* Fix mu type, test=kunlun

* [XPU]Migrate argsort and arg_max XPU kernel into Phi

* test=kunlun

* test=kunlun

* transfer concat kernel

* test=kunlun

* test=kunlun

* test=kunlun

* test=kunlun

* move pool/pool_grad xpu kernel to phi, test=kunlun

* replace mutable_data() with DeviceContext::Alloc()

* replace PADDLE_ENFORCE_EQ with PADDLE_ENFORCE_XDNN, test=kunlun

* adjust function param name & update include header

* remove pool_op_xpu.cc

* fire r200 test

* minor, test=kunlun

* fix split bug

* solve function redefine

* fix fluid.layers.split and add unit test

* delete splitInferMeta register in unary.cc

* modify test_split_op GPU unit test

* modify test_split_op GPU unit test place param

* refactor split op and fix infershape bugs

* add () in && and ||

* fix split C++ unit test

* fix split infershape

* Move XPU mean and mean_grad to phi, test=kunlun

* Fix stream, test=kunlun

* Replace ENFORCE, test=kunlun

* add coalesce_tensor kernel

* polist coalesce_tensor kernel

* add sig and InferMeta

* add testcase

* add legacy_api.yaml

* fix infermeta

* fix yaml

* fix kernel implementation

* add compile dependency of phi/kernels

* fix MetaConfig

* add python api

* add and fix testcase

* rnn.py add import

* change _C_ops.coalesce_tensor

* remove useless comments

* add SetBackend

* restore XPU kernel temporarily

* fix code according to PR comments

* move huber_loss xpu kernel to phi, test=kunlun

* fix, test=kunlun

* fix paddle_enforce, test=kunlun

* Adapt tensor axis for argmin/max

* Add UT

* Polish UT

* move layer_norm xpu kernel to phi, test=kunlun

* fix, test=kunlun

* [OpAttr]Adapt tensor axis for reduce_min/max/mean/sum/prod

* [OpAttr]padding_value of Pad support Tensor type

* fix unittest

* fix unittest

* fix coverage

* fix memcpy_h2d bug related to cuda stream setting when allocate memory

* add header file

* fix compile error for cpu only

* move xpu kernel to phi

* delete fluid file

* fix compile

* add guard, test=kunlun

* xpu set constant

* fix xpu error, test=kunlun

* mv elementwise add to xpu , test=kunlun

* fix ci bugs, test=kunlun

* fix ci bugs , test=kunlun

* abs relu6 fwd

* abs bwd

* gaussian_random_kernel and mkldnn-onednn renaming

* scale kernel

* whitespace

* whitespace

* revert scale migration

* whitespaces

* revert changes to gaussian kernel

* whitespaces

* [XPU] migrate mul to phi;test=kunlun

* rm fluid mul xpu op;test=kunlun

* migrate assign xpu kernel, test=kunlun

* remove assign_value xpu, test=kunlun

* gather gather_grad gather_nd gaussian_random xpu to phi

* fix hard_swish inf

* skip_check_grad for mkldnn op

* 'fix code style'

* fix unittest