wehub-resource-sync
138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
/* ******************************************************************************
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*
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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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* See the NOTICE file distributed with this work for additional
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* information regarding copyright ownership.
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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 02.01.2018
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//
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#include <helpers/hhSequence.h>
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#include <helpers/householder.h>
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namespace sd {
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namespace ops {
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namespace helpers {
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//////////////////////////////////////////////////////////////////////////
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HHsequence::HHsequence(NDArray* vectors, NDArray* coeffs, const char type)
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: _vectors(vectors), _coeffs(coeffs) {
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_diagSize = math::sd_min(_vectors->sizeAt(0), _vectors->sizeAt(1));
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_shift = 0;
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_type = type;
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}
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//////////////////////////////////////////////////////////////////////////
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template <typename T>
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void HHsequence::mulLeft_(NDArray* matrix) {
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const int rows = _vectors->sizeAt(0);
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const int cols = _vectors->sizeAt(1);
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const int inRows = matrix->sizeAt(0);
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NDArray matrixRef = *matrix;
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NDArray vectorsRef = *_vectors;
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for (int i = _diagSize - 1; i >= 0; --i) {
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if (_type == 'u') {
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NDArray *blockPtr = matrixRef({inRows - rows + _shift + i, inRows, 0, 0}, true);
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NDArray block = *blockPtr;
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NDArray *vectorPtr = vectorsRef({i + 1 + _shift, rows, i, i + 1}, true);
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NDArray vector = *vectorPtr;
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Householder<T>::mulLeft(block, vector, _coeffs->t<T>(i));
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delete blockPtr;
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delete vectorPtr;
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} else {
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NDArray *blockPtr = matrixRef({inRows - cols + _shift + i, inRows, 0, 0}, true);
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NDArray block = *blockPtr;
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NDArray *vectorPtr = vectorsRef({i, i + 1, i + 1 + _shift, cols}, true);
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NDArray vector = *vectorPtr;
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Householder<T>::mulLeft(block, vector, _coeffs->t<T>(i));
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delete blockPtr;
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delete vectorPtr;
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////
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NDArray HHsequence::getTail(const int idx) const {
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int first = idx + 1 + _shift;
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NDArray vectorsRef = *_vectors;
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if (_type == 'u') {
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NDArray *tailPtr = vectorsRef({first, -1, idx, idx + 1}, true);
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NDArray tail = *tailPtr;
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delete tailPtr;
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return tail;
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} else {
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NDArray *tailPtr = vectorsRef({idx, idx + 1, first, -1}, true);
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NDArray tail = *tailPtr;
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delete tailPtr;
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return tail;
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}
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}
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//////////////////////////////////////////////////////////////////////////
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template <typename T>
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void HHsequence::applyTo_(NDArray* dest) {
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int size = _type == 'u' ? _vectors->sizeAt(0) : _vectors->sizeAt(1);
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NDArray *originalDest = dest;
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NDArray destRef = *dest;
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std::vector<LongType> sizeShape = {size,size};
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if (dest->rankOf() != 2 || (dest->sizeAt(0) != size && dest->sizeAt(1) != size)) {
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dest = new NDArray(dest->ordering(), sizeShape, dest->dataType(), dest->getContext());
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destRef = *dest;
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}
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dest->setIdentity();
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for (int k = _diagSize - 1; k >= 0; --k) {
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int curNum = size - k - _shift;
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if (curNum < 1 || (k + 1 + _shift) >= size) continue;
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NDArray *blockPtr = destRef({dest->sizeAt(0) - curNum, dest->sizeAt(0), dest->sizeAt(1) - curNum, dest->sizeAt(1)}, true);
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NDArray block = *blockPtr;
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NDArray tailK = getTail(k);
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Householder<T>::mulLeft(block, tailK, _coeffs->t<T>(k));
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delete blockPtr;
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}
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if(originalDest != dest) {
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delete dest;
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void HHsequence::applyTo(NDArray* dest) {
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auto xType = _coeffs->dataType();
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BUILD_SINGLE_SELECTOR(xType, applyTo_, (dest), SD_FLOAT_TYPES);
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}
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//////////////////////////////////////////////////////////////////////////
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void HHsequence::mulLeft(NDArray* matrix) {
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auto xType = _coeffs->dataType();
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BUILD_SINGLE_SELECTOR(xType, mulLeft_, (matrix), SD_FLOAT_TYPES);
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}
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BUILD_SINGLE_TEMPLATE( void HHsequence::applyTo_, (sd::NDArray * dest), SD_FLOAT_TYPES);
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BUILD_SINGLE_TEMPLATE( void HHsequence::mulLeft_, (NDArray * matrix), SD_FLOAT_TYPES);
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} // namespace helpers
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} // namespace ops
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} // namespace sd
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