chore: import upstream snapshot with attribution

2026-07-13 12:47:05 +08:00
commit 4f3b7da785
7394 changed files with 2005594 additions and 0 deletions
@@ -0,0 +1,137 @@
+/* ******************************************************************************
+ *
+ *
+ * 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.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * 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
+ ******************************************************************************/
+
+//
+// Created by Yurii Shyrma on 02.01.2018
+//
+#include <helpers/hhSequence.h>
+#include <helpers/householder.h>
+
+namespace sd {
+namespace ops {
+namespace helpers {
+
+//////////////////////////////////////////////////////////////////////////
+HHsequence::HHsequence(NDArray* vectors, NDArray* coeffs, const char type)
+    : _vectors(vectors), _coeffs(coeffs) {
+  _diagSize = math::sd_min(_vectors->sizeAt(0), _vectors->sizeAt(1));
+  _shift = 0;
+  _type = type;
+}
+
+//////////////////////////////////////////////////////////////////////////
+template <typename T>
+void HHsequence::mulLeft_(NDArray* matrix) {
+  const int rows = _vectors->sizeAt(0);
+  const int cols = _vectors->sizeAt(1);
+  const int inRows = matrix->sizeAt(0);
+  NDArray matrixRef = *matrix;
+  NDArray vectorsRef =  *_vectors;
+  for (int i = _diagSize - 1; i >= 0; --i) {
+    if (_type == 'u') {
+      NDArray *blockPtr = matrixRef({inRows - rows + _shift + i, inRows, 0, 0}, true);
+      NDArray block = *blockPtr;
+      
+      NDArray *vectorPtr = vectorsRef({i + 1 + _shift, rows, i, i + 1}, true);
+      NDArray vector = *vectorPtr;
+      
+      Householder<T>::mulLeft(block, vector, _coeffs->t<T>(i));
+      
+      delete blockPtr;
+      delete vectorPtr;
+    } else {
+      NDArray *blockPtr = matrixRef({inRows - cols + _shift + i, inRows, 0, 0}, true);
+      NDArray block = *blockPtr;
+      
+      NDArray *vectorPtr = vectorsRef({i, i + 1, i + 1 + _shift, cols}, true);
+      NDArray vector = *vectorPtr;
+      
+      Householder<T>::mulLeft(block, vector, _coeffs->t<T>(i));
+      
+      delete blockPtr;
+      delete vectorPtr;
+    }
+  }
+}
+
+//////////////////////////////////////////////////////////////////////////
+NDArray HHsequence::getTail(const int idx) const {
+  int first = idx + 1 + _shift;
+  NDArray vectorsRef =  *_vectors;
+
+  if (_type == 'u') {
+    NDArray *tailPtr = vectorsRef({first, -1, idx, idx + 1}, true);
+    NDArray tail = *tailPtr;
+    delete tailPtr;
+    return tail;
+  } else {
+    NDArray *tailPtr = vectorsRef({idx, idx + 1, first, -1}, true);
+    NDArray tail = *tailPtr;
+    delete tailPtr;
+    return tail;
+  }
+}
+//////////////////////////////////////////////////////////////////////////
+template <typename T>
+void HHsequence::applyTo_(NDArray* dest) {
+  int size = _type == 'u' ? _vectors->sizeAt(0) : _vectors->sizeAt(1);
+ NDArray *originalDest = dest;
+ NDArray destRef = *dest;
+  std::vector<LongType> sizeShape = {size,size};
+  if (dest->rankOf() != 2 || (dest->sizeAt(0) != size && dest->sizeAt(1) != size)) {
+    dest = new NDArray(dest->ordering(), sizeShape, dest->dataType(), dest->getContext());
+    destRef = *dest;
+  }
+  dest->setIdentity();
+
+  for (int k = _diagSize - 1; k >= 0; --k) {
+    int curNum = size - k - _shift;
+    if (curNum < 1 || (k + 1 + _shift) >= size) continue;
+    
+    NDArray *blockPtr = destRef({dest->sizeAt(0) - curNum, dest->sizeAt(0), dest->sizeAt(1) - curNum, dest->sizeAt(1)}, true);
+    NDArray block = *blockPtr;
+
+    NDArray tailK = getTail(k);
+    Householder<T>::mulLeft(block, tailK, _coeffs->t<T>(k));
+    
+    delete blockPtr;
+  }
+
+  if(originalDest != dest) {
+    delete dest;
+  }
+}
+
+//////////////////////////////////////////////////////////////////////////
+void HHsequence::applyTo(NDArray* dest) {
+  auto xType = _coeffs->dataType();
+  BUILD_SINGLE_SELECTOR(xType, applyTo_, (dest), SD_FLOAT_TYPES);
+}
+
+//////////////////////////////////////////////////////////////////////////
+void HHsequence::mulLeft(NDArray* matrix) {
+  auto xType = _coeffs->dataType();
+  BUILD_SINGLE_SELECTOR(xType, mulLeft_, (matrix), SD_FLOAT_TYPES);
+}
+
+BUILD_SINGLE_TEMPLATE( void HHsequence::applyTo_, (sd::NDArray * dest), SD_FLOAT_TYPES);
+BUILD_SINGLE_TEMPLATE( void HHsequence::mulLeft_, (NDArray * matrix), SD_FLOAT_TYPES);
+
+}  // namespace helpers
+}  // namespace ops
+}  // namespace sd