/*
 * Copyright (C) 2014, United States Government, as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All rights reserved.
 *
 * The Java Pathfinder core (jpf-core) platform is licensed under the
 * Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 *        http://www.apache.org/licenses/LICENSE-2.0. 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 */
package gov.nasa.jpf.jvm.bytecode;

import gov.nasa.jpf.vm.Instruction;
import gov.nasa.jpf.vm.StackFrame;
import gov.nasa.jpf.vm.ThreadInfo;


/**
 * Jump subroutine (wide insnIndex)
 * ... => ..., address
 */
public class JSR_W extends Instruction implements JVMInstruction {
  protected int target;

  public JSR_W(int targetPc){
    target = targetPc;
  }

  @Override
  public Instruction execute (ThreadInfo ti) {
    StackFrame frame = ti.getModifiableTopFrame();
    
    int tgtAdr = getNext(ti).getPosition();
    
    frame.push(tgtAdr);

    return mi.getInstructionAt(target);
  }

  @Override
  public int getLength() {
    return 5; // opcode, bb1, bb2, bb3, bb4
  }
  
  @Override
  public int getByteCode () {
    return 0xC9;
  }
  
  @Override
  public void accept(JVMInstructionVisitor insVisitor) {
	  insVisitor.visit(this);
  }
 
  public int getTarget() {
	  return target;
  }

}