package nl.tudelft.simulation.dsol.interpreter.operations; import nl.tudelft.simulation.dsol.interpreter.LocalVariable; import nl.tudelft.simulation.dsol.interpreter.OperandStack; import nl.tudelft.simulation.dsol.interpreter.classfile.Constant; import nl.tudelft.simulation.language.primitives.Primitive; /** * The I2S operation as defined in * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc6.html . *
* (c) copyright 2002-2014 Delft University of Technology.
* BSD-style license. See DSOL License.
* @author Peter Jacobs
* @author Alexander Verbraeck
*/
public class I2S extends VoidOperation
{
/** OP refers to the operand code. */
public static final int OP = 147;
/**
* constructs a new I2S.
*/
public I2S()
{
super();
}
/** {@inheritDoc} */
@Override
public final void execute(final OperandStack stack, final Constant[] constantPool,
final LocalVariable[] localVariables)
{
int i = Primitive.toInteger(stack.pop()).intValue();
// push an integer onto the stack, as shorts are not really known in
// the JVM
stack.push(Integer.valueOf((short) i));
}
/** {@inheritDoc} */
@Override
public final int getByteLength()
{
return OPCODE_BYTE_LENGTH;
}
/** {@inheritDoc} */
@Override
public final int getOpcode()
{
return I2S.OP;
}
}