cavis/libnd4j/include/ops/declarable/generic/linalg/matrix_diag.cpp

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/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
//
// @author GS <sgazeos@gmail.com> 3/21/2018
// @author Yurii Shyrma (iuriish@yahoo.com)
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//
#include <ops/declarable/CustomOperations.h>
#include <ops/declarable/helpers/matrixSetDiag.h>
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namespace sd {
namespace ops {
CUSTOM_OP_IMPL(matrix_diag, 1, 1, false, 0, 0) {
auto diagonal = INPUT_VARIABLE(0);
auto output = OUTPUT_VARIABLE(0);
REQUIRE_TRUE(!diagonal->isScalar(), 0, "CUSTOM_OP matrix_diag: input diagonal array must be at list a vector, but scalar was given!");
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helpers::matrixSetDiag(block.launchContext(), *output, *diagonal, *output, true);
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return Status::OK();
}
DECLARE_SHAPE_FN(matrix_diag) {
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Nd4jLong* outShapeInfo = nullptr;
auto in = inputShape->at(0);
int inRank = shape::rank(in);
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// if for example diagonal array has shape [A,B,C] then output array has shape [A,B,C,C]
int outRank = inRank + 1;
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ALLOCATE(outShapeInfo, block.getWorkspace(), shape::shapeInfoLength(outRank), Nd4jLong);
outShapeInfo[0] = outRank;
for(int i = 0; i < inRank; ++i)
outShapeInfo[i + 1] = shape::sizeAt(in, i);
outShapeInfo[outRank] = shape::sizeAt(in, -1);
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ShapeUtils::updateStridesAndType(outShapeInfo, in, shape::order(in));
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return SHAPELIST(CONSTANT(outShapeInfo));
}
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DECLARE_TYPES(matrix_diag) {
getOpDescriptor()
->setAllowedInputTypes(sd::DataType::ANY)
->setSameMode(true);
}
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}
}