piiswrong commented on a change in pull request #7393: add depthwise 
convolution's gpu version optimization
URL: https://github.com/apache/incubator-mxnet/pull/7393#discussion_r132093964
 
 

 ##########
 File path: src/operator/convolution.cu
 ##########
 @@ -45,6 +47,18 @@ Operator* CreateOp<gpu>(ConvolutionParam param, int dtype,
     })
     return op;
   }
+
+  // depth wise conv
+  if (!param.depthwise_conv_off &&
+      param.num_filter == param.num_group &&
+      param.layout.value() == mshadow::kNCHW &&
+      param.num_filter == (*in_shape)[conv::kData][1] &&
+      param.kernel.ndim() == 2 &&
+      param.dilate == mshadow::Shape2(1, 1) &&
+      dtype == mshadow::kFloat32) {
 
 Review comment:
   any reason for limiting to float32?
 
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