kshitij12345 commented on a change in pull request #15413: [MXNET-978] Higher
Order Gradient Support `reciprocal`, `abs`.
URL: https://github.com/apache/incubator-mxnet/pull/15413#discussion_r300451842
##########
File path: src/operator/tensor/elemwise_unary_op_basic.cc
##########
@@ -708,7 +739,26 @@ The storage type of ``abs`` output depends upon the input
storage type:
)code" ADD_FILELINE)
.set_attr<nnvm::FGradient>("FGradient", ElemwiseGradUseIn{"_backward_abs"});
-MXNET_OPERATOR_REGISTER_BINARY_WITH_SPARSE_CPU(_backward_abs,
unary_bwd<mshadow_op::sign>);
+MXNET_OPERATOR_REGISTER_BINARY_WITH_SPARSE_CPU(_backward_abs,
unary_bwd<mshadow_op::sign>)
+.set_attr<nnvm::FGradient>("FGradient",
+ [](const nnvm::NodePtr& n, const std::vector<nnvm::NodeEntry>& ograds) {
+ // ograds[0]: dL/dxgrad
+ // inputs[0]: dL/dy
+ // inputs[1]: y
Review comment:
Fixed.
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