third_party/hexagon/fully_connected.cc

/* 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

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

/* Copyright 2020 The Qualcomm Innovation Center, Inc. All Rights Reserved.

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below) provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
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* Neither the name of Qualcomm Innovation Center, Inc. nor the names of its
  contributors may be used to endorse or promote products derived from this
  software without specific prior written permission.

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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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==============================================================================*/

#include "tensorflow/lite/micro/kernels/fully_connected.h"

#include "tensorflow/lite/c/builtin_op_data.h"
#include "tensorflow/lite/c/common.h"
#include "tensorflow/lite/kernels/internal/common.h"
#include "tensorflow/lite/kernels/internal/quantization_util.h"
#include "tensorflow/lite/kernels/internal/reference/fully_connected.h"
#include "tensorflow/lite/kernels/internal/reference/integer_ops/fully_connected.h"
#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
#include "tensorflow/lite/kernels/kernel_util.h"
#include "tensorflow/lite/micro/kernels/kernel_util.h"
#include "tensorflow/lite/micro/micro_log.h"
#include "third_party/hexagon/hexagon_fully_connected.h"
#include "third_party/hexagon/hexagon_tflm_translation_fully_connected.h"

namespace tflite {

namespace {

TfLiteStatus EvalFloat(TfLiteContext* context, TfLiteNode* node,
                       TfLiteFusedActivation activation,
                       const TfLiteEvalTensor* input,
                       const TfLiteEvalTensor* filter,
                       const TfLiteEvalTensor* bias, TfLiteEvalTensor* output) {
  float output_activation_min, output_activation_max;
  CalculateActivationRange(activation, &output_activation_min,
                           &output_activation_max);
  tflite::FullyConnectedParams op_params;
  op_params.float_activation_min = output_activation_min;
  op_params.float_activation_max = output_activation_max;

  const float* bias_data =
      nullptr != bias ? tflite::micro::GetTensorData<float>(bias) : nullptr;

  tflite::reference_ops::FullyConnected(
      op_params, tflite::micro::GetTensorShape(input),
      tflite::micro::GetTensorData<float>(input),
      tflite::micro::GetTensorShape(filter),
      tflite::micro::GetTensorData<float>(filter),
      tflite::micro::GetTensorShape(bias), bias_data,
      tflite::micro::GetTensorShape(output),
      tflite::micro::GetTensorData<float>(output));
  return kTfLiteOk;
}

}  // namespace

TfLiteStatus HexagonFullyConnectedEval(TfLiteContext* context,
                                       TfLiteNode* node) {
  TFLITE_DCHECK(node->builtin_data != nullptr);
  const auto* params =
      static_cast<const TfLiteFullyConnectedParams*>(node->builtin_data);

  const TfLiteEvalTensor* input =
      tflite::micro::GetEvalInput(context, node, kFullyConnectedInputTensor);
  const TfLiteEvalTensor* filter =
      tflite::micro::GetEvalInput(context, node, kFullyConnectedWeightsTensor);
  const TfLiteEvalTensor* bias =
      tflite::micro::GetEvalInput(context, node, kFullyConnectedBiasTensor);
  TfLiteEvalTensor* output =
      tflite::micro::GetEvalOutput(context, node, kFullyConnectedOutputTensor);

  TFLITE_DCHECK(node->user_data != nullptr);

  // Checks in Prepare ensure input, output and filter types are all the same.
  switch (input->type) {
    case kTfLiteFloat32:
      return EvalFloat(context, node, params->activation, input, filter, bias,
                       output);

    case kTfLiteInt8:
      return HexagonFullyConnectedEvalInt8(context, node);

    default:
      MicroPrintf( "Type %s (%d) not supported.",
                         TfLiteTypeGetName(input->type), input->type);
      return kTfLiteError;
  }
  return kTfLiteOk;
}

TFLMRegistration Register_FULLY_CONNECTED() {
  return tflite::micro::RegisterOp(HexagonFullyConnectedInit,
                                   HexagonFullyConnectedPrepare,
                                   HexagonFullyConnectedEval);
}

TFLMInferenceRegistration RegisterInference_FULLY_CONNECTED() {
  return tflite::micro::RegisterOp(HexagonFullyConnectedEval);
}

}  // namespace tflite