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) {
      boolean aproxEquals = (a > b)
        ? ((a - b) < maxDelta)
        : ((b - a) < maxDelta);
      if (!aproxEquals) {
        throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta);
      }
    }
  
    public static void expectApproxEquals(double a, double b, double maxDelta) {
      boolean aproxEquals = (a > b)
        ? ((a - b) < maxDelta)
        : ((b - a) < maxDelta);
      if (!aproxEquals) {
        throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta);
      }
    }
  
    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) {
      mul();
    }
  
    public static void mul() {
      mulInt();
      mulLong();
      mulFloat();
      mulDouble();
    }
  
    private static void mulInt() {
      expectEquals(15, $opt$Mul(5, 3));
      expectEquals(0, $opt$Mul(0, 0));
      expectEquals(0, $opt$Mul(0, 3));
      expectEquals(0, $opt$Mul(3, 0));
      expectEquals(-3, $opt$Mul(1, -3));
      expectEquals(36, $opt$Mul(-12, -3));
      expectEquals(33, $opt$Mul(1, 3) * 11);
      expectEquals(671088645, $opt$Mul(134217729, 5)); // (2^27 + 1) * 5
    }
  
    private static void mulLong() {
      expectEquals(15L, $opt$Mul(5L, 3L));
      expectEquals(0L, $opt$Mul(0L, 0L));
      expectEquals(0L, $opt$Mul(0L, 3L));
      expectEquals(0L, $opt$Mul(3L, 0L));
      expectEquals(-3L, $opt$Mul(1L, -3L));
      expectEquals(36L, $opt$Mul(-12L, -3L));
      expectEquals(33L, $opt$Mul(1L, 3L) * 11L);
      expectEquals(240518168583L, $opt$Mul(34359738369L, 7L)); // (2^35 + 1) * 7
    }
  
    private static void mulFloat() {
      expectApproxEquals(15F, $opt$Mul(5F, 3F), 0.0001F);
      expectApproxEquals(0F, $opt$Mul(0F, 0F), 0.0001F);
      expectApproxEquals(0F, $opt$Mul(0F, 3F), 0.0001F);
      expectApproxEquals(0F, $opt$Mul(3F, 0F), 0.0001F);
      expectApproxEquals(-3F, $opt$Mul(1F, -3F), 0.0001F);
      expectApproxEquals(36F, $opt$Mul(-12F, -3F), 0.0001F);
      expectApproxEquals(33F, $opt$Mul(1F, 3F) * 11F, 0.0001F);
      expectApproxEquals(0.02F, 0.1F * 0.2F, 0.0001F);
      expectApproxEquals(-0.1F, -0.5F * 0.2F, 0.0001F);
  
      expectNaN($opt$Mul(0F, Float.POSITIVE_INFINITY));
      expectNaN($opt$Mul(0F, Float.NEGATIVE_INFINITY));
      expectNaN($opt$Mul(Float.NaN, 11F));
      expectNaN($opt$Mul(Float.NaN, -11F));
      expectNaN($opt$Mul(Float.NaN, Float.NEGATIVE_INFINITY));
      expectNaN($opt$Mul(Float.NaN, Float.POSITIVE_INFINITY));
  
      expectEquals(Float.POSITIVE_INFINITY, $opt$Mul(2F, 3.40282346638528860e+38F));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Mul(2F, Float.POSITIVE_INFINITY));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Mul(-2F, Float.POSITIVE_INFINITY));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Mul(-2F, 3.40282346638528860e+38F));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Mul(2F, Float.NEGATIVE_INFINITY));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Mul(-2F, Float.NEGATIVE_INFINITY));
      expectEquals(Float.NEGATIVE_INFINITY, $opt$Mul(Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Mul(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY));
      expectEquals(Float.POSITIVE_INFINITY, $opt$Mul(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY));
    }
  
    private static void mulDouble() {
      expectApproxEquals(15D, $opt$Mul(5D, 3D), 0.0001D);
      expectApproxEquals(0D, $opt$Mul(0D, 0D), 0.0001D);
      expectApproxEquals(0D, $opt$Mul(0D, 3D), 0.0001D);
      expectApproxEquals(0D, $opt$Mul(3D, 0D), 0.0001D);
      expectApproxEquals(-3D, $opt$Mul(1D, -3D), 0.0001D);
      expectApproxEquals(36D, $opt$Mul(-12D, -3D), 0.0001D);
      expectApproxEquals(33D, $opt$Mul(1D, 3D) * 11D, 0.0001D);
      expectApproxEquals(0.02D, 0.1D * 0.2D, 0.0001D);
      expectApproxEquals(-0.1D, -0.5D * 0.2D, 0.0001D);
  
      expectNaN($opt$Mul(0D, Double.POSITIVE_INFINITY));
      expectNaN($opt$Mul(0D, Double.NEGATIVE_INFINITY));
      expectNaN($opt$Mul(Double.NaN, 11D));
      expectNaN($opt$Mul(Double.NaN, -11D));
      expectNaN($opt$Mul(Double.NaN, Double.NEGATIVE_INFINITY));
      expectNaN($opt$Mul(Double.NaN, Double.POSITIVE_INFINITY));
  
      expectEquals(Double.POSITIVE_INFINITY, $opt$Mul(2D, 1.79769313486231570e+308));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Mul(2D, Double.POSITIVE_INFINITY));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Mul(-2D, Double.POSITIVE_INFINITY));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Mul(-2D, 1.79769313486231570e+308));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Mul(2D, Double.NEGATIVE_INFINITY));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Mul(-2D, Double.NEGATIVE_INFINITY));
      expectEquals(Double.NEGATIVE_INFINITY, $opt$Mul(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Mul(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
      expectEquals(Double.POSITIVE_INFINITY, $opt$Mul(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
    }
  
    static int $opt$Mul(int a, int b) {
      return a * b;
    }
  
    static long $opt$Mul(long a, long b) {
      return a * b;
    }
  
    static float $opt$Mul(float a, float b) {
      return a * b;
    }
  
    static double $opt$Mul(double a, double b) {
      return a * b;
    }
  }
  