text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  
  /*
   * Copyright (c) 2021, OPEN AI LAB
   * Author: haitao@openailab.com
   */
  
  #include "relu_param.h"
  
  #include "graph/tensor.h"
  #include "graph/node.h"
  #include "graph/graph.h"
  #include "module/module.h"
  #include "operator/op.h"
  #include "utility/sys_port.h"
  #include "utility/log.h"
  #include "device/cpu/cpu_node.h"
  #include "device/cpu/cpu_graph.h"
  #include "device/cpu/cpu_module.h"
  
  #include "arm_math.h"
  
  
  /**
   * @brief Q7 RELU function
   * @param[in,out]   data        pointer to input
   * @param[in]       size        number of elements
   * @return none.
   *
   * @details
   *
   * Optimized relu with QSUB instructions.
   *
   */
  void arm_relu_q7(q7_t* data, uint16_t size);
  
  static int init_node(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      exec_node->inplace_map[0] = 0;
      exec_node->inplace_map[1] = 0;
      exec_node->inplace_map_num = 1;
  
      return 0;
  }
  
  static int release_node(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      exec_node->inplace_map_num = 0;
  
      return 0;
  }
  
  static int run(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      struct node* ir_node = exec_node->ir_node;
      struct graph* ir_graph = ir_node->graph;
      struct tensor* input_tensor;
      struct tensor* output_tensor;
  
      input_tensor = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[0]);
      output_tensor = get_ir_graph_tensor(ir_graph, ir_node->output_tensors[0]);
  
      if (input_tensor->data != output_tensor->data)
      {
          TLOG_ERR("input and output are not the same mem\n");
          set_tengine_errno(EFAULT);
          return -1;
      }
  
      arm_relu_q7(input_tensor->data, input_tensor->elem_num);
  
      return 0;
  }
  
  static int score(struct node_ops* node_ops, struct exec_graph* exec_graph, struct node* exec_node)
  {
      return OPS_SCORE_BEST;
  }
  
  static struct node_ops cmsis_node_ops = {.prerun = NULL,
                                           .run = run,
                                           .reshape = NULL,
                                           .postrun = NULL,
                                           .init_node = init_node,
                                           .release_node = release_node,
                                           .score = score};
  
  int register_relu_cmsis_op(void* arg)
  {
      return register_builtin_node_ops(OP_RELU, &cmsis_node_ops);
  }
  
  int unregister_relu_cmsis_op(void* arg)
  {
      return unregister_builtin_node_ops(OP_RELU, &cmsis_node_ops);
  }
  