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diff --git a/libjava/classpath/java/lang/Double.java b/libjava/classpath/java/lang/Double.java
new file mode 100644
index 000000000..3ae1b0111
--- /dev/null
+++ b/libjava/classpath/java/lang/Double.java
@@ -0,0 +1,625 @@
+/* Double.java -- object wrapper for double
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+   Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.lang;
+
+import gnu.java.lang.CPStringBuilder;
+
+/**
+ * Instances of class <code>Double</code> represent primitive
+ * <code>double</code> values.
+ *
+ * Additionally, this class provides various helper functions and variables
+ * related to doubles.
+ *
+ * @author Paul Fisher
+ * @author Andrew Haley (aph@cygnus.com)
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @author Tom Tromey (tromey@redhat.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.0
+ * @status partly updated to 1.5
+ */
+public final class Double extends Number implements Comparable<Double>
+{
+  /**
+   * Compatible with JDK 1.0+.
+   */
+  private static final long serialVersionUID = -9172774392245257468L;
+
+  /**
+   * The maximum positive value a <code>double</code> may represent
+   * is 1.7976931348623157e+308.
+   */
+  public static final double MAX_VALUE = 1.7976931348623157e+308;
+
+  /**
+   * The minimum positive value a <code>double</code> may represent
+   * is 5e-324.
+   */
+  public static final double MIN_VALUE = 5e-324;
+
+  /**
+   * The value of a double representation -1.0/0.0, negative
+   * infinity.
+   */
+  public static final double NEGATIVE_INFINITY = -1.0 / 0.0;
+
+  /**
+   * The value of a double representing 1.0/0.0, positive infinity.
+   */
+  public static final double POSITIVE_INFINITY = 1.0 / 0.0;
+
+  /**
+   * All IEEE 754 values of NaN have the same value in Java.
+   */
+  public static final double NaN = 0.0 / 0.0;
+
+  /**
+   * The number of bits needed to represent a <code>double</code>.
+   * @since 1.5
+   */
+  public static final int SIZE = 64;
+
+ /**
+   * The primitive type <code>double</code> is represented by this
+   * <code>Class</code> object.
+   * @since 1.1
+   */
+  public static final Class<Double> TYPE = (Class<Double>) VMClassLoader.getPrimitiveClass('D');
+
+  /**
+   * Cache representation of 0
+   */
+  private static final Double ZERO = new Double(0.0d);
+
+  /**
+   * Cache representation of 1
+   */
+  private static final Double ONE = new Double(1.0d);
+
+  /**
+   * The immutable value of this Double.
+   *
+   * @serial the wrapped double
+   */
+  private final double value;
+
+  /**
+   * Create a <code>Double</code> from the primitive <code>double</code>
+   * specified.
+   *
+   * @param value the <code>double</code> argument
+   */
+  public Double(double value)
+  {
+    this.value = value;
+  }
+
+  /**
+   * Create a <code>Double</code> from the specified <code>String</code>.
+   * This method calls <code>Double.parseDouble()</code>.
+   *
+   * @param s the <code>String</code> to convert
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+   *         <code>double</code>
+   * @throws NullPointerException if <code>s</code> is null
+   * @see #parseDouble(String)
+   */
+  public Double(String s)
+  {
+    value = parseDouble(s);
+  }
+
+  /**
+   * Convert the <code>double</code> to a <code>String</code>.
+   * Floating-point string representation is fairly complex: here is a
+   * rundown of the possible values.  "<code>[-]</code>" indicates that a
+   * negative sign will be printed if the value (or exponent) is negative.
+   * "<code>&lt;number&gt;</code>" means a string of digits ('0' to '9').
+   * "<code>&lt;digit&gt;</code>" means a single digit ('0' to '9').<br>
+   *
+   * <table border=1>
+   * <tr><th>Value of Double</th><th>String Representation</th></tr>
+   * <tr><td>[+-] 0</td> <td><code>[-]0.0</code></td></tr>
+   * <tr><td>Between [+-] 10<sup>-3</sup> and 10<sup>7</sup>, exclusive</td>
+   *     <td><code>[-]number.number</code></td></tr>
+   * <tr><td>Other numeric value</td>
+   *     <td><code>[-]&lt;digit&gt;.&lt;number&gt;
+   *          E[-]&lt;number&gt;</code></td></tr>
+   * <tr><td>[+-] infinity</td> <td><code>[-]Infinity</code></td></tr>
+   * <tr><td>NaN</td> <td><code>NaN</code></td></tr>
+   * </table>
+   *
+   * Yes, negative zero <em>is</em> a possible value.  Note that there is
+   * <em>always</em> a <code>.</code> and at least one digit printed after
+   * it: even if the number is 3, it will be printed as <code>3.0</code>.
+   * After the ".", all digits will be printed except trailing zeros. The
+   * result is rounded to the shortest decimal number which will parse back
+   * to the same double.
+   *
+   * <p>To create other output formats, use {@link java.text.NumberFormat}.
+   *
+   * @XXX specify where we are not in accord with the spec.
+   *
+   * @param d the <code>double</code> to convert
+   * @return the <code>String</code> representing the <code>double</code>
+   */
+  public static String toString(double d)
+  {
+    return VMDouble.toString(d, false);
+  }
+
+  /**
+   * Convert a double value to a hexadecimal string.  This converts as
+   * follows:
+   * <ul>
+   * <li> A NaN value is converted to the string "NaN".
+   * <li> Positive infinity is converted to the string "Infinity".
+   * <li> Negative infinity is converted to the string "-Infinity".
+   * <li> For all other values, the first character of the result is '-'
+   * if the value is negative.  This is followed by '0x1.' if the
+   * value is normal, and '0x0.' if the value is denormal.  This is
+   * then followed by a (lower-case) hexadecimal representation of the
+   * mantissa, with leading zeros as required for denormal values.
+   * The next character is a 'p', and this is followed by a decimal
+   * representation of the unbiased exponent.
+   * </ul>
+   * @param d the double value
+   * @return the hexadecimal string representation
+   * @since 1.5
+   */
+  public static String toHexString(double d)
+  {
+    if (isNaN(d))
+      return "NaN";
+    if (isInfinite(d))
+      return d < 0 ? "-Infinity" : "Infinity";
+
+    long bits = doubleToLongBits(d);
+    CPStringBuilder result = new CPStringBuilder();
+
+    if (bits < 0)
+      result.append('-');
+    result.append("0x");
+
+    final int mantissaBits = 52;
+    final int exponentBits = 11;
+    long mantMask = (1L << mantissaBits) - 1;
+    long mantissa = bits & mantMask;
+    long expMask = (1L << exponentBits) - 1;
+    long exponent = (bits >>> mantissaBits) & expMask;
+
+    result.append(exponent == 0 ? '0' : '1');
+    result.append('.');
+    result.append(Long.toHexString(mantissa));
+    if (exponent == 0 && mantissa != 0)
+      {
+        // Treat denormal specially by inserting '0's to make
+        // the length come out right.  The constants here are
+        // to account for things like the '0x'.
+        int offset = 4 + ((bits < 0) ? 1 : 0);
+        // The silly +3 is here to keep the code the same between
+        // the Float and Double cases.  In Float the value is
+        // not a multiple of 4.
+        int desiredLength = offset + (mantissaBits + 3) / 4;
+        while (result.length() < desiredLength)
+          result.insert(offset, '0');
+      }
+    result.append('p');
+    if (exponent == 0 && mantissa == 0)
+      {
+        // Zero, so do nothing special.
+      }
+    else
+      {
+        // Apply bias.
+        boolean denormal = exponent == 0;
+        exponent -= (1 << (exponentBits - 1)) - 1;
+        // Handle denormal.
+        if (denormal)
+          ++exponent;
+      }
+
+    result.append(Long.toString(exponent));
+    return result.toString();
+  }
+
+  /**
+   * Returns a <code>Double</code> object wrapping the value.
+   * In contrast to the <code>Double</code> constructor, this method
+   * may cache some values.  It is used by boxing conversion.
+   *
+   * @param val the value to wrap
+   * @return the <code>Double</code>
+   * @since 1.5
+   */
+  public static Double valueOf(double val)
+  {
+    if ((val == 0.0) && (doubleToRawLongBits(val) == 0L))
+      return ZERO;
+    else if (val == 1.0)
+      return ONE;
+    else
+      return new Double(val);
+  }
+
+ /**
+   * Create a new <code>Double</code> object using the <code>String</code>.
+   *
+   * @param s the <code>String</code> to convert
+   * @return the new <code>Double</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+   *         <code>double</code>
+   * @throws NullPointerException if <code>s</code> is null.
+   * @see #parseDouble(String)
+   */
+  public static Double valueOf(String s)
+  {
+    return valueOf(parseDouble(s));
+  }
+
+  /**
+   * Parse the specified <code>String</code> as a <code>double</code>. The
+   * extended BNF grammar is as follows:<br>
+   * <pre>
+   * <em>DecodableString</em>:
+   *      ( [ <code>-</code> | <code>+</code> ] <code>NaN</code> )
+   *    | ( [ <code>-</code> | <code>+</code> ] <code>Infinity</code> )
+   *    | ( [ <code>-</code> | <code>+</code> ] <em>FloatingPoint</em>
+   *              [ <code>f</code> | <code>F</code> | <code>d</code>
+   *                | <code>D</code>] )
+   * <em>FloatingPoint</em>:
+   *      ( { <em>Digit</em> }+ [ <code>.</code> { <em>Digit</em> } ]
+   *              [ <em>Exponent</em> ] )
+   *    | ( <code>.</code> { <em>Digit</em> }+ [ <em>Exponent</em> ] )
+   * <em>Exponent</em>:
+   *      ( ( <code>e</code> | <code>E</code> )
+   *              [ <code>-</code> | <code>+</code> ] { <em>Digit</em> }+ )
+   * <em>Digit</em>: <em><code>'0'</code> through <code>'9'</code></em>
+   * </pre>
+   *
+   * <p>NaN and infinity are special cases, to allow parsing of the output
+   * of toString.  Otherwise, the result is determined by calculating
+   * <em>n * 10<sup>exponent</sup></em> to infinite precision, then rounding
+   * to the nearest double. Remember that many numbers cannot be precisely
+   * represented in floating point. In case of overflow, infinity is used,
+   * and in case of underflow, signed zero is used. Unlike Integer.parseInt,
+   * this does not accept Unicode digits outside the ASCII range.
+   *
+   * <p>If an unexpected character is found in the <code>String</code>, a
+   * <code>NumberFormatException</code> will be thrown.  Leading and trailing
+   * 'whitespace' is ignored via <code>String.trim()</code>, but spaces
+   * internal to the actual number are not allowed.
+   *
+   * <p>To parse numbers according to another format, consider using
+   * {@link java.text.NumberFormat}.
+   *
+   * @XXX specify where/how we are not in accord with the spec.
+   *
+   * @param str the <code>String</code> to convert
+   * @return the <code>double</code> value of <code>s</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+   *         <code>double</code>
+   * @throws NullPointerException if <code>s</code> is null
+   * @see #MIN_VALUE
+   * @see #MAX_VALUE
+   * @see #POSITIVE_INFINITY
+   * @see #NEGATIVE_INFINITY
+   * @since 1.2
+   */
+  public static double parseDouble(String str)
+  {
+    return VMDouble.parseDouble(str);
+  }
+
+  /**
+   * Return <code>true</code> if the <code>double</code> has the same
+   * value as <code>NaN</code>, otherwise return <code>false</code>.
+   *
+   * @param v the <code>double</code> to compare
+   * @return whether the argument is <code>NaN</code>.
+   */
+  public static boolean isNaN(double v)
+  {
+    // This works since NaN != NaN is the only reflexive inequality
+    // comparison which returns true.
+    return v != v;
+  }
+
+  /**
+   * Return <code>true</code> if the <code>double</code> has a value
+   * equal to either <code>NEGATIVE_INFINITY</code> or
+   * <code>POSITIVE_INFINITY</code>, otherwise return <code>false</code>.
+   *
+   * @param v the <code>double</code> to compare
+   * @return whether the argument is (-/+) infinity.
+   */
+  public static boolean isInfinite(double v)
+  {
+    return v == POSITIVE_INFINITY || v == NEGATIVE_INFINITY;
+  }
+
+  /**
+   * Return <code>true</code> if the value of this <code>Double</code>
+   * is the same as <code>NaN</code>, otherwise return <code>false</code>.
+   *
+   * @return whether this <code>Double</code> is <code>NaN</code>
+   */
+  public boolean isNaN()
+  {
+    return isNaN(value);
+  }
+
+  /**
+   * Return <code>true</code> if the value of this <code>Double</code>
+   * is the same as <code>NEGATIVE_INFINITY</code> or
+   * <code>POSITIVE_INFINITY</code>, otherwise return <code>false</code>.
+   *
+   * @return whether this <code>Double</code> is (-/+) infinity
+   */
+  public boolean isInfinite()
+  {
+    return isInfinite(value);
+  }
+
+  /**
+   * Convert the <code>double</code> value of this <code>Double</code>
+   * to a <code>String</code>.  This method calls
+   * <code>Double.toString(double)</code> to do its dirty work.
+   *
+   * @return the <code>String</code> representation
+   * @see #toString(double)
+   */
+  public String toString()
+  {
+    return toString(value);
+  }
+
+  /**
+   * Return the value of this <code>Double</code> as a <code>byte</code>.
+   *
+   * @return the byte value
+   * @since 1.1
+   */
+  public byte byteValue()
+  {
+    return (byte) value;
+  }
+
+  /**
+   * Return the value of this <code>Double</code> as a <code>short</code>.
+   *
+   * @return the short value
+   * @since 1.1
+   */
+  public short shortValue()
+  {
+    return (short) value;
+  }
+
+  /**
+   * Return the value of this <code>Double</code> as an <code>int</code>.
+   *
+   * @return the int value
+   */
+  public int intValue()
+  {
+    return (int) value;
+  }
+
+  /**
+   * Return the value of this <code>Double</code> as a <code>long</code>.
+   *
+   * @return the long value
+   */
+  public long longValue()
+  {
+    return (long) value;
+  }
+
+  /**
+   * Return the value of this <code>Double</code> as a <code>float</code>.
+   *
+   * @return the float value
+   */
+  public float floatValue()
+  {
+    return (float) value;
+  }
+
+  /**
+   * Return the value of this <code>Double</code>.
+   *
+   * @return the double value
+   */
+  public double doubleValue()
+  {
+    return value;
+  }
+
+  /**
+   * Return a hashcode representing this Object. <code>Double</code>'s hash
+   * code is calculated by:<br>
+   * <code>long v = Double.doubleToLongBits(doubleValue());<br>
+   *    int hash = (int)(v^(v&gt;&gt;32))</code>.
+   *
+   * @return this Object's hash code
+   * @see #doubleToLongBits(double)
+   */
+  public int hashCode()
+  {
+    long v = doubleToLongBits(value);
+    return (int) (v ^ (v >>> 32));
+  }
+
+  /**
+   * Returns <code>true</code> if <code>obj</code> is an instance of
+   * <code>Double</code> and represents the same double value. Unlike comparing
+   * two doubles with <code>==</code>, this treats two instances of
+   * <code>Double.NaN</code> as equal, but treats <code>0.0</code> and
+   * <code>-0.0</code> as unequal.
+   *
+   * <p>Note that <code>d1.equals(d2)</code> is identical to
+   * <code>doubleToLongBits(d1.doubleValue()) ==
+   *    doubleToLongBits(d2.doubleValue())</code>.
+   *
+   * @param obj the object to compare
+   * @return whether the objects are semantically equal
+   */
+  public boolean equals(Object obj)
+  {
+    if (obj instanceof Double)
+      {
+        double d = ((Double) obj).value;
+        return (doubleToRawLongBits(value) == doubleToRawLongBits(d)) ||
+          (isNaN(value) && isNaN(d));
+      }
+    return false;
+  }
+
+  /**
+   * Convert the double to the IEEE 754 floating-point "double format" bit
+   * layout. Bit 63 (the most significant) is the sign bit, bits 62-52
+   * (masked by 0x7ff0000000000000L) represent the exponent, and bits 51-0
+   * (masked by 0x000fffffffffffffL) are the mantissa. This function
+   * collapses all versions of NaN to 0x7ff8000000000000L. The result of this
+   * function can be used as the argument to
+   * <code>Double.longBitsToDouble(long)</code> to obtain the original
+   * <code>double</code> value.
+   *
+   * @param value the <code>double</code> to convert
+   * @return the bits of the <code>double</code>
+   * @see #longBitsToDouble(long)
+   */
+  public static long doubleToLongBits(double value)
+  {
+    if (isNaN(value))
+      return 0x7ff8000000000000L;
+    else
+      return VMDouble.doubleToRawLongBits(value);
+  }
+
+  /**
+   * Convert the double to the IEEE 754 floating-point "double format" bit
+   * layout. Bit 63 (the most significant) is the sign bit, bits 62-52
+   * (masked by 0x7ff0000000000000L) represent the exponent, and bits 51-0
+   * (masked by 0x000fffffffffffffL) are the mantissa. This function
+   * leaves NaN alone, rather than collapsing to a canonical value. The
+   * result of this function can be used as the argument to
+   * <code>Double.longBitsToDouble(long)</code> to obtain the original
+   * <code>double</code> value.
+   *
+   * @param value the <code>double</code> to convert
+   * @return the bits of the <code>double</code>
+   * @see #longBitsToDouble(long)
+   */
+  public static long doubleToRawLongBits(double value)
+  {
+    return VMDouble.doubleToRawLongBits(value);
+  }
+
+  /**
+   * Convert the argument in IEEE 754 floating-point "double format" bit
+   * layout to the corresponding float. Bit 63 (the most significant) is the
+   * sign bit, bits 62-52 (masked by 0x7ff0000000000000L) represent the
+   * exponent, and bits 51-0 (masked by 0x000fffffffffffffL) are the mantissa.
+   * This function leaves NaN alone, so that you can recover the bit pattern
+   * with <code>Double.doubleToRawLongBits(double)</code>.
+   *
+   * @param bits the bits to convert
+   * @return the <code>double</code> represented by the bits
+   * @see #doubleToLongBits(double)
+   * @see #doubleToRawLongBits(double)
+   */
+  public static double longBitsToDouble(long bits)
+  {
+    return VMDouble.longBitsToDouble(bits);
+  }
+
+  /**
+   * Compare two Doubles numerically by comparing their <code>double</code>
+   * values. The result is positive if the first is greater, negative if the
+   * second is greater, and 0 if the two are equal. However, this special
+   * cases NaN and signed zero as follows: NaN is considered greater than
+   * all other doubles, including <code>POSITIVE_INFINITY</code>, and positive
+   * zero is considered greater than negative zero.
+   *
+   * @param d the Double to compare
+   * @return the comparison
+   * @since 1.2
+   */
+  public int compareTo(Double d)
+  {
+    return compare(value, d.value);
+  }
+
+  /**
+   * Behaves like <code>new Double(x).compareTo(new Double(y))</code>; in
+   * other words this compares two doubles, special casing NaN and zero,
+   * without the overhead of objects.
+   *
+   * @param x the first double to compare
+   * @param y the second double to compare
+   * @return the comparison
+   * @since 1.4
+   */
+  public static int compare(double x, double y)
+  {
+      // handle the easy cases:
+      if (x < y)
+          return -1;
+      if (x > y)
+          return 1;
+
+      // handle equality respecting that 0.0 != -0.0 (hence not using x == y):
+      long lx = doubleToRawLongBits(x);
+      long ly = doubleToRawLongBits(y);
+      if (lx == ly)
+          return 0;
+
+      // handle NaNs:
+      if (x != x)
+          return (y != y) ? 0 : 1;
+      else if (y != y)
+          return -1;
+
+      // handle +/- 0.0
+      return (lx < ly) ? -1 : 1;
+  }
+}