agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeWideable.java

/*
 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package sun.jvm.hotspot.interpreter;

import sun.jvm.hotspot.oops.*;

public abstract class BytecodeWideable extends Bytecode {
  BytecodeWideable(Method method, int bci) {
    super(method, bci);
  }

  public boolean isWide() {
    int prevBci = bci() - 1;
    return (prevBci > -1 && method.getBytecodeOrBPAt(prevBci) == Bytecodes._wide);
  }

  // the local variable index
  public int getLocalVarIndex() {
    return (isWide()) ? getIndexU2(code(), true) : getIndexU1();
  }
}