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comparison agent/src/share/classes/sun/jvm/hotspot/oops/BranchData.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 // BranchData
35 //
36 // A BranchData is used to access profiling data for a two-way branch.
37 // It consists of taken and notTaken counts as well as a data displacement
38 // for the taken case.
39 public class BranchData extends JumpData {
40
41 static final int notTakenOffSet = jumpCellCount;
42 static final int branchCellCount = notTakenOffSet + 1;
43
44 public BranchData(DataLayout layout) {
45 super(layout);
46 //assert(layout.tag() == DataLayout.branchDataTag, "wrong type");
47 }
48
49 static int staticCellCount() {
50 return branchCellCount;
51 }
52
53 public int cellCount() {
54 return staticCellCount();
55 }
56
57 // Direct accessor
58 int notTaken() {
59 return uintAt(notTakenOffSet);
60 }
61
62 // Code generation support
63 static int notTakenOffset() {
64 return cellOffset(notTakenOffSet);
65 }
66 static int branchDataSize() {
67 return cellOffset(branchCellCount);
68 }
69
70 public void printDataOn(PrintStream st) {
71 printShared(st, "BranchData");
72 st.println("taken(" + taken() + ") displacement(" + displacement() + ")");
73 tab(st);
74 st.println("not taken(" + notTaken() + ")");
75 }
76 }