58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
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/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// Created by Yurii Shyrma on 07.12.2017.
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//
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#include "ResultSet.h"
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#include <ops/declarable/helpers/matrixSetDiag.h>
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namespace nd4j {
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namespace ops {
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namespace helpers {
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//////////////////////////////////////////////////////////////////////////
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// Returns a batched matrix tensor with new batched diagonal values.
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// for detailed explanations please take a look on web page: https://www.tensorflow.org/api_docs/python/tf/matrix_set_diag
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template <typename T>
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static void _matrixSetDiag(const NDArray* input, const NDArray* diagonal, NDArray* output) {
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*output = *input;
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const int lastDimSize = input->sizeAt(-1);
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const int last2DimSize = input->sizeAt(-1) * input->sizeAt(-2);
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const int lastSmallDim = diagonal->sizeAt(-1);
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const int batchSize = input->lengthOf()/last2DimSize;
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for(int i = 0; i < batchSize; ++i )
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for(int j = 0; j < lastSmallDim; ++j) {
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output->p(i*last2DimSize + j*(lastDimSize + 1), diagonal->e<T>(i*lastSmallDim + j));
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}
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}
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void matrixSetDiag(nd4j::LaunchContext * context, const NDArray* input, const NDArray* diagonal, NDArray* output) {
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BUILD_SINGLE_SELECTOR(input->dataType(), _matrixSetDiag, (input, diagonal, output), LIBND4J_TYPES);
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}
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BUILD_SINGLE_TEMPLATE(template void _matrixSetDiag, (const NDArray* input, const NDArray* diagonal, NDArray* output), LIBND4J_TYPES);
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}
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}
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}
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