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comparison agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeFastIAccess0.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.interpreter;
26
27 import sun.jvm.hotspot.oops.*;
28 import sun.jvm.hotspot.utilities.*;
29
30 public class BytecodeFastIAccess0 extends BytecodeGetPut {
31 BytecodeFastIAccess0(Method method, int bci) {
32 super(method, bci);
33 }
34
35 public int index() {
36 return (int) (0xFF & javaShortAt(2));
37 }
38
39 public boolean isStatic() {
40 return false;
41 }
42
43 public void verify() {
44 if (Assert.ASSERTS_ENABLED) {
45 Assert.that(isValid(), "check fast_iaccess_0");
46 }
47 }
48
49 public boolean isValid() {
50 return code() == Bytecodes._fast_iaccess_0;
51 }
52
53 public static BytecodeFastIAccess0 at(Method method, int bci) {
54 BytecodeFastIAccess0 b = new BytecodeFastIAccess0(method, bci);
55 if (Assert.ASSERTS_ENABLED) {
56 b.verify();
57 }
58 return b;
59 }
60
61 /** Like at, but returns null if the BCI is not at fast_iaccess_0 */
62 public static BytecodeFastIAccess0 atCheck(Method method, int bci) {
63 BytecodeFastIAccess0 b = new BytecodeFastIAccess0(method, bci);
64 return (b.isValid() ? b : null);
65 }
66
67 public static BytecodeFastIAccess0 at(BytecodeStream bcs) {
68 return new BytecodeFastIAccess0(bcs.method(), bcs.bci());
69 }
70
71 public String toString() {
72 StringBuffer buf = new StringBuffer();
73 buf.append("aload_0");
74 buf.append(spaces);
75 buf.append(super.toString());
76 return buf.toString();
77 }
78 }