content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * 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
   *
   *      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.
   */
  
  // Note that $opt$ is a marker for the optimizing compiler to test
  // it does compile the method.
  public class Main {
  
    public static void expectEquals(int expected, int result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  
    public static void expectEquals(long expected, long result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  
    public static void expectEquals(float expected, float result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  
    public static void expectEquals(double expected, double result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  
    public static void expectApproxEquals(float a, float b) {
      float maxDelta = 0.0001F;
      boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
      if (!aproxEquals) {
        throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
      }
    }
  
    public static void expectApproxEquals(double a, double b) {
      double maxDelta = 0.00001D;
      boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
      if (!aproxEquals) {
        throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
      }
    }
  
    public static void expectNaN(float a) {
      if (a == a) {
        throw new Error("Expected NaN: " + a);
      }
    }
  
    public static void expectNaN(double a) {
      if (a == a) {
        throw new Error("Expected NaN: " + a);
      }
    }
  
    public static void main(String[] args) {
      subInt();
      subLong();
      subFloat();
      subDouble();
    }
  
    private static void subInt() {
      expectEquals(2, $opt$Sub(5, 3));
      expectEquals(0, $opt$Sub(0, 0));
      expectEquals(-3, $opt$Sub(0, 3));
      expectEquals(3, $opt$Sub(3, 0));
      expectEquals(4, $opt$Sub(1, -3));
      expectEquals(-9, $opt$Sub(-12, -3));
      expectEquals(134217724, $opt$Sub(134217729, 5)); // (2^27 + 1) - 5
    }
  
    private static void subLong() {
      expectEquals(2L, $opt$Sub(5L, 3L));
      expectEquals(0L, $opt$Sub(0L, 0L));
      expectEquals(-3L, $opt$Sub(0L, 3L));
      expectEquals(3L, $opt$Sub(3L, 0L));
      expectEquals(4L, $opt$Sub(1L, -3L));
      expectEquals(-9L, $opt$Sub(-12L, -3L));
      expectEquals(134217724L, $opt$Sub(134217729L, 5L)); // (2^27 + 1) - 5
      expectEquals(34359738362L, $opt$Sub(34359738369L, 7L)); // (2^35 + 1) - 7
    }
  
    private static void subFloat() {
      expectApproxEquals(2F, $opt$Sub(5F, 3F));
      expectApproxEquals(0F, $opt$Sub(0F, 0F));
      expectApproxEquals(-3F, $opt$Sub(0F, 3F));
      expectApproxEquals(3F, $opt$Sub(3F, 0F));
      expectApproxEquals(4F, $opt$Sub(1F, -3F));
      expectApproxEquals(-9F, $opt$Sub(-12F, -3F));
      expectApproxEquals(34359738362F, $opt$Sub(34359738369F, 7F)); // (2^35 + 1) - 7
      expectApproxEquals(-0.1F, $opt$Sub(0.1F, 0.2F));
      expectApproxEquals(0.2F, $opt$Sub(-0.5F, -0.7F));
  
      expectNaN($opt$Sub(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY));
      expectNaN($opt$Sub(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY));
      expectNaN($opt$Sub(Float.NaN, 11F));
      expectNaN($opt$Sub(Float.NaN, -11F));
      expectNaN($opt$Sub(Float.NaN, Float.NEGATIVE_INFINITY));
      expectNaN($opt$Sub(Float.NaN, Float.POSITIVE_INFINITY));
  
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(-Float.MAX_VALUE, Float.MAX_VALUE));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(2F, Float.POSITIVE_INFINITY));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.MAX_VALUE, -Float.MAX_VALUE));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(2F, Float.NEGATIVE_INFINITY));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY));
    }
  
    private static void subDouble() {
      expectApproxEquals(2D, $opt$Sub(5D, 3D));
      expectApproxEquals(0D, $opt$Sub(0D, 0D));
      expectApproxEquals(-3D, $opt$Sub(0D, 3D));
      expectApproxEquals(3D, $opt$Sub(3D, 0D));
      expectApproxEquals(4D, $opt$Sub(1D, -3D));
      expectApproxEquals(-9D, $opt$Sub(-12D, -3D));
      expectApproxEquals(134217724D, $opt$Sub(134217729D, 5D)); // (2^27 + 1) - 5
      expectApproxEquals(34359738362D, $opt$Sub(34359738369D, 7D)); // (2^35 + 1) - 7
      expectApproxEquals(-0.1D, $opt$Sub(0.1D, 0.2D));
      expectApproxEquals(0.2D, $opt$Sub(-0.5D, -0.7D));
  
      expectNaN($opt$Sub(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
      expectNaN($opt$Sub(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
      expectNaN($opt$Sub(Double.NaN, 11D));
      expectNaN($opt$Sub(Double.NaN, -11D));
      expectNaN($opt$Sub(Double.NaN, Double.NEGATIVE_INFINITY));
      expectNaN($opt$Sub(Double.NaN, Double.POSITIVE_INFINITY));
  
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(-Double.MAX_VALUE, Double.MAX_VALUE));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(2D, Double.POSITIVE_INFINITY));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.MAX_VALUE, -Double.MAX_VALUE));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(2D, Double.NEGATIVE_INFINITY));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY));
    }
  
    static int $opt$Sub(int a, int b) {
      return a - b;
    }
  
    static long $opt$Sub(long a, long b) {
      return a - b;
    }
  
    static float $opt$Sub(float a, float b) {
      return a - b;
    }
  
    static double $opt$Sub(double a, double b) {
      return a - b;
    }
  
  }
  