eric-haibin-lin commented on a change in pull request #11024: [MXNET-394]
concat of CSR NDArrays on first dimension
URL: https://github.com/apache/incubator-mxnet/pull/11024#discussion_r194191072
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File path: src/operator/nn/concat-inl.h
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@@ -154,6 +154,92 @@ void ConcatGradCompute(const nnvm::NodeAttrs& attrs,
const OpContext& ctx,
});
}
+/*!
+ * \brief concat CSRNDArray on the first dimension.
+ */
+struct concat_csr_first_dim {
+ /*!
+ * \param i the i-th row of the input ndarray
+ * \param out_idx output csr ndarray column indices
+ * \param out_data output csr ndarray data
+ * \param out_indptr output csr ndarray row index pointer
+ * \param in_idx input csr ndarray column indices
+ * \param in_data input csr ndarray data
+ * \param in_indptr input csr ndarray row index pointer
+ * \param indptr_offset offset for ouput ndarray row index pointer
+ * \param idx_offset offset for ouput ndarray column indices
+ */
+ template<typename DType, typename RType, typename IType>
+ MSHADOW_XINLINE static void Map(int i, const OpReqType req,
+ DType* out_data, const DType* in_data,
+ RType* out_indptr, const RType* in_indptr,
+ IType* out_idx, const IType* in_idx,
+ const nnvm::dim_t indptr_offset,
+ const nnvm::dim_t idx_offset) {
+ if (i == 0) out_indptr[0] = 0;
+ out_indptr[i+1+indptr_offset] = in_indptr[i+1] + idx_offset;
+ for (nnvm::dim_t j = in_indptr[i]; j < in_indptr[i+1]; ++j) {
+ KERNEL_ASSIGN(out_idx[j+idx_offset], req, in_idx[j]);
+ KERNEL_ASSIGN(out_data[j+idx_offset], req, in_data[j]);
+ }
+ }
+};
+
+template<typename xpu>
+void ConcatRspImpl(const nnvm::NodeAttrs& attrs,
Review comment:
Is this CSR Impl or RSP impl??
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