dynamic_update_slice.cc | Explore in Territory

/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.

Licensed 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.
==============================================================================*/

#include <algorithm>
#include <cmath>
#include <cstdint>
#include <vector>

#include "tensorflow/lite/core/c/c_api_types.h"
#include "tensorflow/lite/core/c/common.h"
#include "tensorflow/lite/kernels/internal/optimized/optimized_ops.h"
#include "tensorflow/lite/kernels/internal/tensor.h"
#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
#include "tensorflow/lite/kernels/internal/types.h"
#include "tensorflow/lite/kernels/kernel_util.h"

namespace tflite {
namespace ops {
namespace builtin {
namespace dynamic_update_slice {

constexpr int kOperandTensor = …;
constexpr int kUpdateTensor = …;
constexpr int kStartIndicesTensor = …;
constexpr int kOutputTensor = …;

// TFLite DynamicUpdateSlice op follows the semantics of XLA DynamicUpdateSlice
// op. See https://www.tensorflow.org/xla/operation_semantics#dynamicupdateslice
// for details.
TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) { … }

// A helper function that converts a tensor index into a flat array index.
// Takes `start_indices` as an offset if not null.
int TensorIndexToFlat(const int* index, const int dims,
                      const RuntimeShape& shape,
                      const int* start_indices = nullptr) { … }

// A helper function to compute the clamped start indices to ensure they are
// not out of bounds.
std::vector<int> ClampStartIndices(int input_dims, const int64_t* indices_data,
                                   const RuntimeShape& input_shape,
                                   const RuntimeShape& update_shape) { … }

template <typename T>
void DynamicUpdateSlice(const TfLiteTensor* input, const TfLiteTensor* update,
                        const int64_t* indices_data, TfLiteTensor* output) { … }

TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) { … }
}  // namespace dynamic_update_slice

TfLiteRegistration* Register_DYNAMIC_UPDATE_SLICE() { … }

}  // namespace builtin
}  // namespace ops
}  // namespace tflite
chromium/third_party/tflite/src/tensorflow/lite/kernels/dynamic_update_slice.cc
