apeforest commented on a change in pull request #15531: [MXNET-978] Higher
Order Gradient Support `arctan`, `arctanh`, `radians`.
URL: https://github.com/apache/incubator-mxnet/pull/15531#discussion_r305531609
##########
File path: src/operator/tensor/elemwise_unary_op_trig.cc
##########
@@ -201,7 +202,35 @@ The storage type of ``arctan`` output depends upon the
input storage type:
.set_attr<nnvm::FGradient>("FGradient", ElemwiseGradUseIn{ "_backward_arctan"
});
MXNET_OPERATOR_REGISTER_BINARY_WITH_SPARSE_CPU_DR(_backward_arctan,
-
unary_bwd<mshadow_op::arctan_grad>);
+
unary_bwd<mshadow_op::arctan_grad>)
+.set_attr<nnvm::FGradient>("FGradient",
+ [](const nnvm::NodePtr& n, const std::vector<nnvm::NodeEntry>& ograds) {
+ // ograds[0]: head_grad_grads (dL/dy_grad)
Review comment:
Isn't it dL/dx_grad?
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