larroy commented on a change in pull request #15120: [bug] fix higher grad log
URL: https://github.com/apache/incubator-mxnet/pull/15120#discussion_r290528016
##########
File path: src/operator/tensor/elemwise_unary_op_basic.cc
##########
@@ -1074,16 +1074,19 @@
MXNET_OPERATOR_REGISTER_BINARY_WITH_SPARSE_CPU_DR(_backward_log,
[](const nnvm::NodePtr& n, const std::vector<nnvm::NodeEntry>& ograds) {
// For f(x) -> f = log
// f''(x) = -1 * (f'(x) * f'(x))
- auto gx = nnvm::NodeEntry{n};
+ auto gx_mul_head_grads = nnvm::NodeEntry{n}; // f'(x) * head_grads
+ auto head_grads = nnvm::NodeEntry{n->inputs[0]};
+ auto g_lx = MakeNode("reciprocal", n->attrs.name + "_backward_log_grad",
Review comment:
can we add a comment about the inputs? it would help reason about the code.
Are the inputs
- [0]: ograd
- [1]: f(x)
?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
