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: bzhang@openailab.com
   */
  
  #include "graph/tensor.h"
  #include "graph/node.h"
  #include "graph/graph.h"
  #include "utility/sys_port.h"
  #include "utility/float.h"
  #include "utility/log.h"
  #include "device/cpu/cpu_node.h"
  #include "device/cpu/cpu_graph.h"
  #include "device/cpu/cpu_module.h"
  
  
  static int init_node(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      return 0;
  }
  
  static int release_node(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      return 0;
  }
  static int ref_where_fp32(float* condition, float* data_a, float* data_b, float* output, int size)
  {
      for(int i = 0; i < size; i++)
      {
          output[i] = condition[i] ? data_a[i] : data_b[i];
      }
      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]);
  
      struct tensor* input_tensor_a = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[1]);
      struct tensor* input_tensor_b = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[2]);
      
      int elem_num_condition = input_tensor->elem_num;
      int elem_num_a = input_tensor_a->elem_num;
      int elem_num_b = input_tensor_b->elem_num;
  
      if(elem_num_condition != elem_num_a || elem_num_condition != elem_num_b){
          TLOG_ERR("Tensor size is not equal\n");
          return -1;
      }
  
      int ret = ref_where_fp32(input_tensor->data, input_tensor_a->data, input_tensor_b->data, output_tensor->data, elem_num_a);
      if(ret < -1){
          TLOG_ERR("where operator execution error\n");
          return -1;
      }
  
      return 0;
  }
  static int reshape(struct node_ops* node_ops, struct exec_node* exec_node, struct exec_graph* exec_graph)
  {
      struct node* node = exec_node->ir_node;
      struct graph* ir_graph = node->graph;
      struct tensor* input = get_ir_graph_tensor(ir_graph, node->input_tensors[0]);
      struct tensor* output = get_ir_graph_tensor(ir_graph, node->output_tensors[0]);
  
      int ret = set_ir_tensor_shape(output, input->dims, input->dim_num);
      return ret;
  }
  
  static int score(struct node_ops* node_ops, struct exec_graph* exec_graph, struct node* exec_node)
  {
      return OPS_SCORE_CANDO;
  }
  
  static struct node_ops hcl_node_ops = {.prerun = NULL,
                                         .run = run,
                                         .reshape = reshape,
                                         .postrun = NULL,
                                         .init_node = init_node,
                                         .release_node = release_node,
                                         .score = score};
  
  int register_where_ref_op(void* arg)
  {
      return register_builtin_node_ops(OP_WHERE, &hcl_node_ops);
  }
  
  int unregister_where_ref_op(void* arg)
  {
      return unregister_builtin_node_ops(OP_WHERE, &hcl_node_ops);
  }
  