1/*
2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25package sun.jvm.hotspot.interpreter;
26
27import sun.jvm.hotspot.oops.*;
28import sun.jvm.hotspot.runtime.*;
29
30// any bytecode with constant pool index
31
32public abstract class BytecodeWithCPIndex extends Bytecode {
33  BytecodeWithCPIndex(Method method, int bci) {
34    super(method, bci);
35  }
36
37  // the constant pool index for this bytecode
38  public int index() {
39    if (code() == Bytecodes._invokedynamic) {
40      int index = getIndexU4();
41      if (ConstantPool.isInvokedynamicIndex(index)) {
42        return ConstantPool.decodeInvokedynamicIndex(index);
43      } else {
44        return index;
45      }
46    } else {
47      return getIndexU2(code(), false);
48    }
49  }
50
51  protected int indexForFieldOrMethod() {
52     ConstantPoolCache cpCache = method().getConstants().getCache();
53     // get ConstantPool index from ConstantPoolCacheIndex at given bci
54     int cpCacheIndex = index();
55     if (cpCache == null) {
56        return cpCacheIndex;
57     } else {
58      return cpCache.getEntryAt((int) (0xFFFF & cpCacheIndex)).getConstantPoolIndex();
59     }
60  }
61}
62