/[classpath]/classpath/java/lang/Integer.java
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revision 1.29.2.2 by tromey, Sat Oct 9 23:12:26 2004 UTC revision 1.29.2.3 by tromey, Mon Nov 1 15:57:08 2004 UTC
# Line 663  public final class Integer extends Numbe Line 663  public final class Integer extends Numbe
663    public static int reverse(int val)    public static int reverse(int val)
664    {    {
665      // Successively swap alternating bit groups.      // Successively swap alternating bit groups.
666      x = ((x >> 1) & 0x55555555) + ((x << 1) & ~0x55555555);      val = ((val >> 1) & 0x55555555) + ((val << 1) & ~0x55555555);
667      x = ((x >> 2) & 0x33333333) + ((x << 2) & ~0x33333333);      val = ((val >> 2) & 0x33333333) + ((val << 2) & ~0x33333333);
668      x = ((x >> 4) & 0x0f0f0f0f) + ((x << 4) & ~0x0f0f0f0f);      val = ((val >> 4) & 0x0f0f0f0f) + ((val << 4) & ~0x0f0f0f0f);
669      x = ((x >> 8) & 0x00ff00ff) + ((x << 8) & ~0x00ff00ff);      val = ((val >> 8) & 0x00ff00ff) + ((val << 8) & ~0x00ff00ff);
670      return ((x >> 16) & 0x0000ffff) + ((x << 16) & ~0x0000ffff);      return ((val >> 16) & 0x0000ffff) + ((val << 16) & ~0x0000ffff);
671    }    }
672    
673    /**    /**

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