TaoLv commented on a change in pull request #13699: add mkldnn softmax_output
URL: https://github.com/apache/incubator-mxnet/pull/13699#discussion_r246771873
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File path: src/operator/softmax_output.cc
##########
@@ -21,30 +21,141 @@
* Copyright (c) 2015 by Contributors
* \file softmax_output.cc
* \brief
- * \author Bing Xu
+ * \author Bing Xu, Zhang Rong A
*/
#include "./softmax_output-inl.h"
-
+#if MXNET_USE_MKLDNN == 1
+#include "./nn/mkldnn/mkldnn_ops-inl.h"
+#endif
namespace mxnet {
namespace op {
-template<>
-Operator *CreateOp<cpu>(SoftmaxOutputParam param, int dtype) {
- Operator *op = nullptr;
- MSHADOW_REAL_TYPE_SWITCH(dtype, DType, {
- op = new SoftmaxOutputOp<cpu, DType>(param);
- })
- return op;
+
+DMLC_REGISTER_PARAMETER(SoftmaxOutputParam);
+struct SoftmaxOutputGrad {
+ const char *op_name;
+ std::vector<nnvm::NodeEntry> operator()(const nnvm::NodePtr& n,
+ const std::vector<nnvm::NodeEntry>&
ograds) const {
+ std::vector<nnvm::NodeEntry> out_data(n->num_outputs());
+ for (uint32_t i = 0; i < out_data.size(); ++i) {
+ out_data[i] = nnvm::NodeEntry{n, i, 0};
+ }
+ std::vector<nnvm::NodeEntry> heads;
+ heads.push_back(out_data[softmaxout_enum::kOut]);
+ heads.push_back(n->inputs[softmaxout_enum::kLabel]);
+
+ nnvm::NodePtr gnode = nnvm::Node::Create();
+ gnode->inputs = std::move(heads);
+ gnode->control_deps.emplace_back(n);
+ gnode->attrs = n->attrs;
+ gnode->attrs.op = nnvm::Op::Get("_backward_SoftmaxOutput");
+ gnode->attrs.name = n->attrs.name + "_backward";
+ std::vector<nnvm::NodeEntry> in_grad(2);
+ for (uint32_t i = 0; i < 2; ++i) {
Review comment:
if there are only two elements, no need to have for-loop.
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