apeforest commented on a change in pull request #14779: Fully connected, higher
order grad
URL: https://github.com/apache/incubator-mxnet/pull/14779#discussion_r311756546
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File path: src/operator/nn/fully_connected.cc
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@@ -176,11 +176,23 @@ struct FullyConnectedGrad {
}
};
-inline static bool FCStorageType(const nnvm::NodeAttrs& attrs,
- const int dev_mask,
- DispatchMode* dispatch_mode,
- std::vector<int> *in_attrs,
- std::vector<int> *out_attrs) {
+
+struct FullyConnectedGradGrad {
+ const char *op_name;
+ std::vector<nnvm::NodeEntry> operator()(const nnvm::NodePtr& n,
+ const std::vector<nnvm::NodeEntry>&
ograds) const {
+ std::vector<nnvm::NodeEntry> heads(ograds.begin(), ograds.end());
+ heads.push_back(n->inputs[0]); // o_y : head gradient of the output y
+ return MakeGradNode(op_name, n, heads, n->attrs.dict);
+ }
+};
+
+
+static bool FCStorageType(const nnvm::NodeAttrs& attrs,
Review comment:
Can you provide reference and document it somewhere. It's not clear why we
need to remove inline here especially it's not related to this feature at all.
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