uk.ac.man.cs.rainbow.simulator
Class RASM.Comparison

java.lang.Object
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  +--uk.ac.man.cs.rainbow.simulator.Instruction
        |
        +--uk.ac.man.cs.rainbow.simulator.RASM.Comparison

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Geq, Gt, Leq, Lt

Enclosing class:

RASM

public abstract static class RASM.Comparison

extends Instruction

Comparison operation between comparable data values. Note that this does not perform equality testing, since that is done through a separate interface (and it is far more widely defined anyway.) All are of the form:

x y cmp(x,y)

See Also:

Data.Comparable, Data.Comparable.compare(Data.Comparable), Serialized Form

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

Instruction.MACRO

Constructor Summary

RASM.Comparison()

RASM.Comparison(RASMCode code)

Method Summary

protected abstract boolean	compare(int executeResults) Determine the meaning of the result of a comparison between values.
protected boolean	execute(RASMThread thread) Make this instruction execute in the given context.

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, toString, wait, wait, wait

Constructor Detail

RASM.Comparison

public RASM.Comparison()

RASM.Comparison

public RASM.Comparison(RASMCode code)

Method Detail

compare

protected abstract boolean compare(int executeResults)

Determine the meaning of the result of a comparison between values.

Parameters:

executeResults - Negative if the first argument is less than the second, positive if the first argument is greater than the second, and zero otherwise.

Returns:

The boolean to push onto the stack.

execute

protected boolean execute(RASMThread thread)
                   throws RainbowException

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...