1/* 2 * Copyright (c) 2011, 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.oops; 26 27import java.io.*; 28import java.util.*; 29import sun.jvm.hotspot.debugger.*; 30import sun.jvm.hotspot.runtime.*; 31import sun.jvm.hotspot.types.*; 32import 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. 39public 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} 77