hzfan commented on a change in pull request #15258: Numpy Trace URL: https://github.com/apache/incubator-mxnet/pull/15258#discussion_r295652673
########## File path: src/operator/numpy/np_trace_op-inl.h ########## @@ -0,0 +1,255 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/*! + * \file np_trace_op-inl.h + * \brief Function definition of matrix numpy-compatible trace operator + */ + +#ifndef MXNET_OPERATOR_NUMPY_NP_TRACE_OP_INL_H_ +#define MXNET_OPERATOR_NUMPY_NP_TRACE_OP_INL_H_ + +#include <dmlc/parameter.h> +#include <mxnet/operator_util.h> +#include <vector> +#include <utility> +#include <algorithm> +#include "../mxnet_op.h" +#include "../operator_common.h" +#include "../elemwise_op_common.h" +#include "../tensor/broadcast_reduce_op.h" + +namespace mxnet { +namespace op { + +struct NumpyTraceParam: public dmlc::Parameter<NumpyTraceParam> { + int offset, axis1, axis2; + DMLC_DECLARE_PARAMETER(NumpyTraceParam) { + DMLC_DECLARE_FIELD(offset) + .set_default(0) + .describe("Offset of the diagonal from the main diagonal. " + "Can be both positive and negative. Defaults to 0."); + DMLC_DECLARE_FIELD(axis1) + .set_default(0) + .describe("Axes to be used as the first axis of the 2-D sub-arrays " + "from which the diagonals should be taken. Defaults to 0."); + DMLC_DECLARE_FIELD(axis2) + .set_default(1) + .describe("Axes to be used as the second axis of the 2-D sub-arrays " + "from which the diagonals should be taken. Defaults to 1."); + } +}; + +template<int ndim, int req, bool back> +struct numpy_trace { + template<typename DType> + MSHADOW_XINLINE static void Map(index_t i, DType* out, const DType* a, + mshadow::Shape<ndim> oshape, + mshadow::Shape<ndim> ishape, + index_t stride, index_t offset, int dlength) { + using namespace mxnet_op; + using namespace mshadow; + index_t j = ravel(unravel(i, oshape), ishape) + offset; + if (back) { + for (index_t k = 0; k < dlength; ++k) { + KERNEL_ASSIGN(out[j], req, a[i]); + j += stride; + } + } else { + if (req == kWriteTo) { + out[i] = 0; + for (index_t k = 0; k < dlength; ++k) { + out[i] += a[j]; + j += stride; + } + } else if (req == kAddTo) { + for (index_t k = 0; k < dlength; ++k) { + out[i] += a[j]; + j += stride; + } + } + } + } +}; + + +template<typename xpu, bool back> +void NumpyTraceOpProcess(const TBlob& in_data, + const TBlob& out_data, + const mxnet::TShape& ishape, + const mxnet::TShape& oshape, + index_t dsize, + const NumpyTraceParam& param, + mxnet_op::Stream<xpu> *s, + const std::vector<OpReqType>& req) { + using namespace mxnet_op; + using namespace mshadow; + if (dsize == 0) { + if (back) { + if (out_data.Size() != 0) { + MSHADOW_TYPE_SWITCH(out_data.type_flag_, DType, { + MXNET_ASSIGN_REQ_SWITCH(req[0], req_type, { + if (req_type == kWriteTo) + out_data.FlatTo1D<xpu, DType>(s) = 0; + }); + }); + } + } + return; + } else if (ishape.Size() == 0) { + if (!back) { + MSHADOW_TYPE_SWITCH(out_data.type_flag_, DType, { + MXNET_ASSIGN_REQ_SWITCH(req[0], req_type, { + if (req_type == kWriteTo) + out_data.FlatTo1D<xpu, DType>(s) = 0; Review comment: fixed ---------------------------------------------------------------- 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
