chromium/third_party/tflite/src/tensorflow/lite/kernels/while.cc

/* Copyright 2019 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 <stddef.h>

#include <cstring>
#include <vector>

#include "tensorflow/lite/context_util.h"
#include "tensorflow/lite/core/c/builtin_op_data.h"
#include "tensorflow/lite/core/c/common.h"
#include "tensorflow/lite/core/subgraph.h"
#include "tensorflow/lite/kernels/control_flow_common.h"
#include "tensorflow/lite/kernels/kernel_util.h"

namespace tflite {
namespace ops {
namespace builtin {
namespace while_kernel {

struct OpData { … };

namespace {


TfLiteStatus CheckCondOutput(TfLiteContext* context,
                             const TfLiteTensor* cond_output) { … }

}  // namespace

void* Init(TfLiteContext* context, const char* buffer, size_t length) { … }

void Free(TfLiteContext* context, void* buffer) { … }

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

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

// Evaluate cond subgraph and set the result.
TfLiteStatus Eval_cond_subgraph(TfLiteContext* context, Subgraph* cond_subgraph,
                                bool cond_has_dynamic_output_tensors,
                                bool* cond_subgraph_output) { … }

void SetupUnconsumedOutputs(const TfLiteNode* node, const OpData* op_data,
                            Subgraph* this_subgraph, Subgraph* body_subgraph) { … }

// Evaluate WHILE op when body subgraph has dynamic outputs.
TfLiteStatus Eval_dynamic(TfLiteContext* context, TfLiteNode* node) { … }

// Evaluate WHILE op when body subgraph has static outputs.
TfLiteStatus Eval_static(TfLiteContext* context, TfLiteNode* node) { … }

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

}  // namespace while_kernel

TfLiteRegistration* Register_WHILE() { … }

}  // namespace builtin
}  // namespace ops
}  // namespace tflite