--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/Bits.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2001-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.utilities;
+
+/** Bit manipulation routines */
+
+public class Bits {
+  public static final int AllBits = ~0;
+  public static final int NoBits  = 0;
+  public static final int OneBit  = 1;
+
+  public static final int BitsPerByte =  8;
+  public static final int BitsPerInt  = 32;
+
+  public static final int LogBytesPerInt  = 2;
+  public static final int LogBytesPerLong = 3;
+
+
+  public static int setBits(int x, int m) {
+    return x | m;
+  }
+
+  public static int clearBits(int x, int m) {
+    return x & ~m;
+  }
+
+  public static int nthBit(int n) {
+    return (n > 32) ? 0 : (OneBit << n);
+  }
+
+  public static int setNthBit(int x, int n) {
+    return setBits(x, nthBit(n));
+  }
+
+  public static int clearNthBit(int x, int n) {
+    return clearBits(x, nthBit(n));
+  }
+
+  public static boolean isSetNthBit(int word, int n) {
+    return maskBits(word, nthBit(n)) != NoBits;
+  }
+
+  public static int rightNBits(int n) {
+    return (nthBit(n) - 1);
+  }
+
+  public static int maskBits(int x, int m) {
+    return x & m;
+  }
+
+  public static long maskBitsLong(long x, long m) {
+    return x & m;
+  }
+
+  /** Returns integer round-up to the nearest multiple of s (s must be
+      a power of two) */
+  public static int roundTo(int x, int s) {
+    int m = s - 1;
+    return maskBits(x + m, ~m);
+  }
+}