topk_v2.cc | Explore in Territory

/* Copyright 2017 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 <stdint.h>

#include <algorithm>
#include <iterator>
#include <vector>

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

namespace tflite {
namespace ops {
namespace builtin {
namespace topk_v2 {
constexpr int kInputTensor = …;
constexpr int kInputTopK = …;
constexpr int kOutputValues = …;
constexpr int kOutputIndexes = …;

namespace {
TfLiteStatus ResizeOutput(TfLiteContext* context, TfLiteNode* node) { … }

// Class that collects indices of top k values.  Based on template
// tensorflow::gtl::TopN<> but, for optimization, it re-uses the same container.
template <typename T, typename Tidx>
class TopContainer { … };

// Mostly modeled on tensorflow/core/kernels/topk_op.cc for CPU.
template <typename T, typename Tidx = int32>
void TopK(int32 row_size, int32 num_rows, const T* data, int32 k,
          Tidx* output_indexes, T* output_values) { … }

}  // namespace

TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) { … }

template <typename idx_type>
TfLiteStatus TopKImpl(TfLiteContext* context, TfLiteNode* node, int32_t k,
                      idx_type* output_indexes) { … }

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

}  // namespace topk_v2
TfLiteRegistration* Register_TOPK_V2() { … }
}  // namespace builtin
}  // namespace ops
}  // namespace tflite
chromium/third_party/tflite/src/tensorflow/lite/kernels/topk_v2.cc
