libjava/testsuite/libjava.lang/PR31264.java

   1 /*
   2  * Javolution - Java(TM) Solution for Real-Time and Embedded Systems
   3  * Copyright (C) 2006 - Javolution (http://javolution.org/)
   4  * All rights reserved.
   5  *
   6  * Permission to use, copy, modify, and distribute this software is
   7  * freely granted, provided that this notice is preserved.
   8  */
   9
  10 public final class PR31264
  11 {
  12   public static long fubar(double d, int n)
  13   {
  14     long bits = Double.doubleToRawLongBits(d);
  15     int exp = ((int)(bits >> 52)) & 0x7FF;
  16     long m = bits & 0x000fffffffffffffL;
  17     if (exp == 0)
  18       {
  19         if (m == 0) return 0L;
  20         return fubar(d * 18014398509481984L, n - 54); // 2^54 Exact.
  21       }
  22     return m;
  23   }
  24
  25   public static void main(String[] argv)
  26   {
  27   }
  28 }