content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. 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
   *
   * https://opensource.org/licenses/Apache-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.
   *
   */
  
  
  package com.tencent.angel.ml.math2.ufuncs.expression;
  
  import com.tencent.angel.ml.math2.utils.Constant;
  
  public class GradLogLoss extends Binary {
  
    public GradLogLoss(boolean inplace) {
      setInplace(inplace);
      setKeepStorage(Constant.keepStorage);
    }
  
    @Override
    public OpType getOpType() {
      return OpType.UNION;
    }
  
    @Override
    public double apply(double ele1, double ele2) {
      return -ele2 / (1 + Math.exp(ele1 * ele2));
    }
  
    @Override
    public double apply(double ele1, float ele2) {
      return -ele2 / (1 + Math.exp(ele1 * ele2));
    }
  
    @Override
    public double apply(double ele1, long ele2) {
      return -ele2 / (1 + Math.exp(ele1 * ele2));
    }
  
    @Override
    public double apply(double ele1, int ele2) {
      return -ele2 / (1 + Math.exp(ele1 * ele2));
    }
  
    @Override
    public float apply(float ele1, float ele2) {
      return (float) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  
    @Override
    public float apply(float ele1, long ele2) {
      return (float) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  
    @Override
    public float apply(float ele1, int ele2) {
      return (float) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  
    @Override
    public long apply(long ele1, long ele2) {
      return (long) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  
    @Override
    public long apply(long ele1, int ele2) {
      return (long) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  
    @Override
    public int apply(int ele1, int ele2) {
      return (int) (-ele2 / (1 + Math.exp(ele1 * ele2)));
    }
  }