haojin2 commented on a change in pull request #11587: [MXNET-378] Adding
depth_to_space and space_to_depth operator(Updated)
URL: https://github.com/apache/incubator-mxnet/pull/11587#discussion_r200792447
##########
File path: src/operator/tensor/matrix_op-inl.h
##########
@@ -2158,6 +2158,285 @@ inline bool SqueezeShape(const nnvm::NodeAttrs& attrs,
return true;
}
+
+struct DepthToSpaceParam : public dmlc::Parameter<DepthToSpaceParam> {
+ int blockSize;
+ DMLC_DECLARE_PARAMETER(DepthToSpaceParam) {
+ DMLC_DECLARE_FIELD(blockSize)
+ .describe("The size of chunks that need to be taken from depth and
spread across to the "
+ "shape dimension of the tensor");
+ }
+};
+
+inline bool DepthToSpaceOpShape(const nnvm::NodeAttrs& attrs,
+ std::vector<TShape>* in_attrs,
+ std::vector<TShape>* out_attrs) {
+ const DepthToSpaceParam& param = nnvm::get<DepthToSpaceParam>(attrs.parsed);
+ CHECK_EQ(in_attrs->size(), 1U);
+ CHECK_EQ(out_attrs->size(), 1U);
+ CHECK_EQ(in_attrs->at(0).ndim(), 4) << "Operation Depth To Space requires
exactly 4D tensor";
+
+ TShape expected_out(in_attrs->at(0).ndim());
+
+ TShape& in_shape = in_attrs->at(0);
+ int block = param.blockSize;
+ CHECK_NE(in_shape[1], 0)
+ << "Depth dimension:1 cannot be 0";
+ CHECK_EQ(in_shape[1]%(block*block), 0)
+ << "Cannot perform Depth To Space operation on the specified tensor. "
+ "Dimension:1(depth dimension) should be a multiple of 'block^2' ";
+ CHECK_NE(in_shape[0], 0)
+ << "Operation requires a 4D tensor. Size of dimension:0 cannot be 0";
+ CHECK_NE(in_shape[2], 0)
+ << "Operation requires a 4D tensor. Size of dimension:2 cannot be 0";
+ CHECK_NE(in_shape[3], 0)
+ << "Operation requires a 4D tensor. Size of dimension:3 cannot be 0";
+
+ expected_out[0] = in_shape[0];
+ expected_out[1] = in_shape[1]/(block*block);
+ uint16_t i = 2;
+ while (i < expected_out.ndim()) {
+ expected_out[i] = in_shape[i] * block;
+ ++i;
+ }
+
+ SHAPE_ASSIGN_CHECK(*out_attrs, 0, expected_out);
+ return true;
+}
+
+inline bool DepthToSpaceOpType(const nnvm::NodeAttrs& attrs,
+ std::vector<int>* in_attrs,
+ std::vector<int>* out_attrs) {
+ CHECK_EQ(in_attrs->size(), 1U);
+ CHECK_EQ(out_attrs->size(), 1U);
+
+ TYPE_ASSIGN_CHECK(*out_attrs, 0, in_attrs->at(0));
+ TYPE_ASSIGN_CHECK(*in_attrs, 0, out_attrs->at(0));
+ return out_attrs->at(0) != -1;
+}
+
+#define UPDATE_INDEX_USING_OFFSET(X) \
+ next_idx_val = idx/dim_size; \
+ inp_index += (idx - (next_idx_val) * dim_size) * offset_arr[X]; \
+ idx = next_idx_val;
+
+template<int req>
+struct depth_to_space_forward {
+ template<typename DType>
+ MSHADOW_XINLINE static void Map(int i, DType* out_data, const DType* in_data,
+ const int block, const int* size, const int* offset_arr) {
+ int inp_index = 0, idx = i, next_idx_val, dim_size;
+ dim_size = block;
+ UPDATE_INDEX_USING_OFFSET(2)
+ dim_size = size[3];
+ UPDATE_INDEX_USING_OFFSET(5)
+ dim_size = block;
+ UPDATE_INDEX_USING_OFFSET(1)
+ dim_size = size[2];
+ UPDATE_INDEX_USING_OFFSET(4)
+ dim_size = size[1]/block/block;
+ UPDATE_INDEX_USING_OFFSET(3)
+ dim_size = size[0];
+ UPDATE_INDEX_USING_OFFSET(0)
+ KERNEL_ASSIGN(out_data[i], req, in_data[inp_index]);
+ }
+};
+
+template<int req>
+struct compute_offset_for_depth_to_space {
+ template<typename DType>
+ MSHADOW_XINLINE static void Map(int i, DType* offset_arr, DType* size, const
int block,
+ const int32_t size0, const int32_t size1, const int32_t size2, const
int32_t size3) {
Review comment:
Alignment
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