/*
 * 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.
 */

/*!
 * \file src/relay/collage/cost.cc
 * \brief Represents the estimated cost of a candidate partition.
 */

#include "./cost.h"

namespace tvm {
namespace relay {
namespace collage {

std::string Cost::ToString() const {
  if (is_invalid()) {
    return "invalid";
  } else if (is_unknown()) {
    return "unknown";
  } else if (value_ == 0.0) {
    return "0";
  } else {
    return std::to_string(value_ * 1e6) + "us";
  }
}

}  // namespace collage
}  // namespace relay
}  // namespace tvm