uk.ac.man.cs.rainbow.simulator.rasm
Class Roll

java.lang.Object
  |
  +--uk.ac.man.cs.rainbow.simulator.Instruction
        |
        +--uk.ac.man.cs.rainbow.simulator.rasm.Roll

All Implemented Interfaces:

Serializable

public class Roll

extends Instruction

Roll the stack contents like the PostScript roll operator. The n argument says how many values are to be rotated, and the j argument says by how much and in what direction the rotation is to take place, with the way it is written below being the way it works with positive numbers, and the reverse operation is performed by using the opposite sign for j.

v_n-1 ... v₀ n j v_(j-1)%n ... v₀ v_n-1 ... v_j%n

See Also:

Serialized Form

Inner classes inherited from class uk.ac.man.cs.rainbow.simulator.Instruction

Instruction.MACRO

Constructor Summary

Roll()

Roll(RASMCode code)

Method Summary

protected boolean	execute(RASMThread thread) Make this instruction execute in the given context.
String	toString()

Methods inherited from class uk.ac.man.cs.rainbow.simulator.Instruction

addClass, getInstruction, getInstruction, getInstruction

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Roll

public Roll()

Roll

public Roll(RASMCode code)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

execute

protected boolean execute(RASMThread thread)
                   throws RASMThread.Exception

Description copied from class: Instruction

Make this instruction execute in the given context.

Overrides:

execute in class Instruction

Following copied from class: uk.ac.man.cs.rainbow.simulator.Instruction

Throws:

RainbowException - All sorts of things can go wrong during execution...