com.tapina.robe.runtime
Class Instruction

java.lang.Object
  com.tapina.robe.runtime.Instruction

Direct Known Subclasses:

Branch, DataProcessingInstruction, DataTransferInstruction, MultipleTransferInstruction, MultiplyInstruction, SWI

public abstract class Instruction

extends java.lang.Object

Created by IntelliJ IDEA. User: gareth Date: Aug 21, 2003 Time: 8:00:02 AM

Field Summary

static int

count

Constructor Summary

Instruction(Condition condition)

Method Summary

boolean	checkAndExecute(Environment environment)
protected void	dumpCondition(java.io.Writer out)
void	dumpJavaSource(java.io.Writer out)
abstract void	dumpJavaSourceUnconditional(java.io.Writer out)
protected abstract boolean	execute(Environment environment) Try to avoid having much in the way of conditionals in this method - it should execute straight through and be as easily optimised/inlined as possible for speed.

Methods inherited from class java.lang.Object

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

Field Detail

count

public static int count

Constructor Detail

Instruction

public Instruction(Condition condition)

Method Detail

checkAndExecute

public final boolean checkAndExecute(Environment environment)

Parameters:

environment -

Returns:

true if the pipeline should be flushed (i.e. branch has occurred)

execute

protected abstract boolean execute(Environment environment)

Try to avoid having much in the way of conditionals in this method - it should execute straight through and be as easily optimised/inlined as possible for speed. Do all your ifs and buts in the decoder or the constructor to this class.

Parameters:

environment -

Returns:

true if the pipeline should be flushed (i.e. branch has occurred)

dumpCondition

protected final void dumpCondition(java.io.Writer out)
                            throws java.io.IOException

Throws:

java.io.IOException

dumpJavaSource

public final void dumpJavaSource(java.io.Writer out)
                          throws java.io.IOException

Throws:

java.io.IOException

dumpJavaSourceUnconditional

public abstract void dumpJavaSourceUnconditional(java.io.Writer out)
                                          throws java.io.IOException

Throws:

java.io.IOException