TfLiteStatus EvalHybridPerChannel(TfLiteContext* context, TfLiteNode* node,
                                  TfLiteConvParams* params, OpData* data,
                                  const TfLiteTensor* input,
                                  const TfLiteTensor* filter,
                                  const TfLiteTensor* bias,
                                  TfLiteTensor* im2col, TfLiteTensor* output) {
  float output_activation_min, output_activation_max;
  CalculateActivationRange(params->activation, &output_activation_min,
                           &output_activation_max);

  const int input_size = NumElements(input) / SizeOfDimension(input, 0);
  const int batch_size = SizeOfDimension(input, 0);
  TfLiteTensor* quantized_input_tensor;
  TF_LITE_ENSURE_OK(context,
                    GetTemporarySafe(context, node, data->input_quantized_index,
                                     &quantized_input_tensor));
  int8_t* quantized_input_ptr_batch =
      GetTensorData<int8_t>(quantized_input_tensor);
  TfLiteTensor* scaling_factors_tensor;
  TF_LITE_ENSURE_OK(context,
                    GetTemporarySafe(context, node, data->scaling_factors_index,
                                     &scaling_factors_tensor));
  float* scaling_factors_ptr = GetTensorData<float>(scaling_factors_tensor);
  TfLiteTensor* input_offset_tensor;
  TF_LITE_ENSURE_OK(context,
                    GetTemporarySafe(context, node, data->input_offset_index,
                                     &input_offset_tensor));
  int32_t* input_offset_ptr = GetTensorData<int32_t>(input_offset_tensor);

  for (int b = 0; b < batch_size; ++b) {
    const int offset = b * input_size;
    tensor_utils::AsymmetricQuantizeFloats(
        GetTensorData<float>(input) + offset, input_size,
        quantized_input_ptr_batch + offset, &scaling_factors_ptr[b],
        &input_offset_ptr[b]);
  }

  int8_t* im2col_ptr = nullptr;
  int8_t* filter_ptr = nullptr;
  if (im2col != nullptr) {
    im2col_ptr = im2col->data.int8;
  }
  filter_ptr = filter->data.int8;
  const auto* affine_quantization =
      reinterpret_cast<TfLiteAffineQuantization*>(filter->quantization.params);

  KernelType effective_kernel_type = kernel_type;
  // We have to fallback to reference execution path when im2col is needed but
  // disabled because to-be-allocated temporary im2col tensor is too large.
  // See b/178743262 for the detailed motivation.
  if (data->im2col_oversized) {
    effective_kernel_type = kReference;
  }

  ConvParams op_params;
  op_params.padding_type = PaddingType::kSame;
  op_params.padding_values.width = data->padding.width;
  op_params.padding_values.height = data->padding.height;
  op_params.dilation_width_factor = params->dilation_width_factor;
  op_params.dilation_height_factor = params->dilation_height_factor;
  op_params.stride_width = params->stride_width;
  op_params.stride_height = params->stride_height;
  op_params.float_activation_min = output_activation_min;
  op_params.float_activation_max = output_activation_max;
  switch (effective_kernel_type) {
    case kReference:
      reference_ops::HybridConvPerChannel(
          op_params, scaling_factors_ptr, GetTensorShape(input),
          quantized_input_ptr_batch, GetTensorShape(filter), filter_ptr,
          GetTensorShape(bias), GetTensorData<float>(bias),
          GetTensorShape(output), GetTensorData<float>(output),
          GetTensorShape(im2col), im2col_ptr, affine_quantization->scale->data,
          input_offset_ptr);
      break;
    case kGenericOptimized:
    case kMultithreadOptimized:
    case kCblasOptimized: {
      TfLiteTensor* row_sums;
      TF_LITE_ENSURE_OK(
          context,
          GetTemporarySafe(context, node, data->row_sums_index, &row_sums));
      TfLiteTensor* scratch;
      TF_LITE_ENSURE_OK(
          context,
          GetTemporarySafe(context, node, data->accum_scratch_index, &scratch));
      optimized_ops::HybridConvPerChannel(
          op_params, scaling_factors_ptr, GetTensorShape(input),
          quantized_input_ptr_batch, GetTensorShape(filter), filter_ptr,
          GetTensorShape(bias), GetTensorData<float>(bias),
          GetTensorShape(output), GetTensorData<float>(output),
          GetTensorShape(im2col), im2col_ptr, affine_quantization->scale->data,
          input_offset_ptr, GetTensorShape(scratch),
          GetTensorData<int32>(scratch), GetTensorData<int32_t>(row_sums),
          &data->compute_hybrid_row_sums,
          CpuBackendContext::GetFromContext(context));
      data->compute_hybrid_row_sums = false;
      break;
    }
  }

  return kTfLiteOk;
}