zheng-da commented on a change in pull request #8302: Refactor operators & 
MKLDNN
URL: https://github.com/apache/incubator-mxnet/pull/8302#discussion_r156510825
 
 

 ##########
 File path: src/operator/nn/activation.cc
 ##########
 @@ -21,65 +21,128 @@
  * Copyright (c) 2015 by Contributors
  * \file activation.cc
  * \brief activation op
- * \author Bing Xu
+ * \author Bing Xu, Da Zheng
 */
 #include "./activation-inl.h"
 #include "../mshadow_op.h"
-#if MXNET_USE_MKL2017 == 1
-#include <mkl_memory.h>
-#include "../mkl/mkl_memory-inl.h"
-#include "../mkl/mkl_relu-inl.h"
-#endif  // MXNET_USE_MKL2017
+#include "../tensor/elemwise_unary_op.h"
+#if MXNET_USE_MKLDNN == 1
+#include "./mkldnn/mkldnn_base-inl.h"
+#include "./mkldnn/mkldnn_act-inl.h"
+#endif  // MXNET_USE_MKLDNN
 
 namespace mxnet {
 namespace op {
-template<>
-Operator *CreateOp<cpu>(ActivationParam param, int dtype, const TShape& 
dshape) {
-  Operator *op = NULL;
-#if MXNET_USE_MKL2017 == 1
-  if (param.act_type == activation::kReLU && dshape.ndim() <= 4) {
-      switch (dtype) {
-      case mshadow::kFloat32:
-          return new MKLReluOp<cpu, float>();
-      case mshadow::kFloat64:
-          return new MKLReluOp<cpu, double>();
-      default:
-          break;
-      }
+
+DMLC_REGISTER_PARAMETER(ActivationParam);
+
+// This will determine the order of the inputs for backward computation.
+struct ActivationGrad {
 
 Review comment:
   I see. I just copied and pasted...

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