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comparison agent/src/share/classes/sun/jvm/hotspot/oops/JumpData.java @ 3939:f6f3bb0ee072

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7088955: add C2 IR support to the SA Reviewed-by: kvn
author never
date Sun, 11 Sep 2011 14:48:24 -0700
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children 4bec1b1f7b33
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3938:e6b1331a51d2 3939:f6f3bb0ee072
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
4 *
5 *
6 *
7 *
8 *
9 *
10 *
11 *
12 *
13 *
14 *
15 *
16 *
17 *
18 *
19 *
20 *
21 *
22 *
23 */
24
25 package sun.jvm.hotspot.oops;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32 import sun.jvm.hotspot.utilities.*;
33
34 // JumpData
35 //
36 // A JumpData is used to access profiling information for a direct
37 // branch. It is a counter, used for counting the number of branches,
38 // plus a data displacement, used for realigning the data pointer to
39 // the corresponding target bci.
40 public class JumpData extends ProfileData {
41 static final int takenOffSet = 0;
42 static final int displacementOffSet = 1;
43 static final int jumpCellCount = 2;
44
45 public JumpData(DataLayout layout) {
46 super(layout);
47 //assert(layout.tag() == DataLayout.jumpDataTag ||
48 // layout.tag() == DataLayout.branchDataTag, "wrong type");
49 }
50
51 static int staticCellCount() {
52 return jumpCellCount;
53 }
54
55 public int cellCount() {
56 return staticCellCount();
57 }
58
59 // Direct accessor
60 int taken() {
61 return uintAt(takenOffSet);
62 }
63
64 int displacement() {
65 return intAt(displacementOffSet);
66 }
67
68 // Code generation support
69 static int takenOffset() {
70 return cellOffset(takenOffSet);
71 }
72
73 static int displacementOffset() {
74 return cellOffset(displacementOffSet);
75 }
76
77 public void printDataOn(PrintStream st) {
78 printShared(st, "JumpData");
79 st.println("taken(" + taken() + ") displacement(" + displacement() + ")");
80 }
81 }