zheng-da commented on a change in pull request #8302: Refactor operators &
MKLDNN
URL: https://github.com/apache/incubator-mxnet/pull/8302#discussion_r162523269
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File path: src/operator/tensor/elemwise_binary_op_basic.cc
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@@ -46,6 +103,41 @@ The storage type of ``elemwise_add`` output depends on
storage types of inputs
// this must differ from elemwise_add to prevent add to optimization in
forward pass.
MXNET_OPERATOR_REGISTER_BINARY_WITH_SPARSE_CPU(_grad_add,
op::mshadow_op::plus);
+static void _backward_ElemwiseAddEx(const nnvm::NodeAttrs& attrs,
+ const OpContext& ctx,
+ const std::vector<NDArray>& inputs,
+ const std::vector<OpReqType>& req,
+ const std::vector<NDArray>& outputs) {
+ CHECK_EQ(inputs.size(), 1U);
+ CHECK_EQ(outputs.size(), 2U);
+#if MXNET_USE_MKLDNN == 1
+ if (inputs[0].IsMKLDNNData()) {
+ MKLDNNCopy(attrs, ctx, inputs[0], req[0], outputs[0]);
+ MKLDNNCopy(attrs, ctx, inputs[0], req[1], outputs[1]);
+ return;
+ }
+#endif
+ ElemwiseBinaryOp::BackwardUseNoneEx<cpu, mshadow_op::identity,
mshadow_op::identity>(
+ attrs, ctx, inputs, req, outputs);
+}
+
+static inline bool _backward_ElemwiseAddStorageType(const nnvm::NodeAttrs&
attrs,
Review comment:
right. i need to change the name.
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