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; /** * The DCMPL operation as defined in * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc3.html . *
* (c) copyright 2002-2014 Delft University of Technology.
* BSD-style license. See DSOL License.
* @author Peter Jacobs
* @author Alexander Verbraeck
*/
public class DCMPL extends VoidOperation
{
/** OP refers to the operand code. */
public static final int OP = 151;
/**
* constructs a new DCMPL.
*/
public DCMPL()
{
super();
}
/** {@inheritDoc} */
@Override
public final void execute(final OperandStack stack, final Constant[] constantPool,
final LocalVariable[] localVariables)
{
Double value2 = (Double) stack.pop();
Double value1 = (Double) stack.pop();
if (value1.isNaN() || value2.isNaN())
{
stack.push(Integer.valueOf(-1));
}
else
{
stack.push(Integer.valueOf(value1.compareTo(value2)));
}
}
/** {@inheritDoc} */
@Override
public final int getByteLength()
{
return OPCODE_BYTE_LENGTH;
}
/** {@inheritDoc} */
@Override
public final int getOpcode()
{
return DCMPL.OP;
}
}