scale.backend.alpha
Class BarriorInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.alpha.MemoryInstruction
          scale.backend.alpha.BarriorInstruction

All Implemented Interfaces:

java.lang.Cloneable

public class BarriorInstruction
extends MemoryInstruction

This class represents an Alpha Memory Barrior instruction.

$Id: BarriorInstruction.java,v 1.16 2006-11-09 14:40:25 burrill Exp $

Copyright 2005 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

Field Summary

Fields inherited from class scale.backend.alpha.MemoryInstruction

displacement, opcode, ra, rb, relocType

Constructor Summary

BarriorInstruction()

Method Summary

void	assembler(Assembler gen, Emit emit) Insert the assembler representation of the instruction into the output stream.
static int	created() Return the number of instances of this class that were created.
void	nullify(RegisterSet rs) Mark the instruction as no longer needed.
void	specifyRegisterUsage(RegisterAllocator rs, int index, int strength) Specify the registers used by this instruction.
java.lang.String	toString()

Methods inherited from class scale.backend.alpha.MemoryInstruction

getDisplacement, getExecutionCycles, getFunctionalUnit, getOpcode, getRa, getRb, getRelocType, independent, instructionSize, remapDestRegister, remapRegisters, remapSrcRegister, setDisplacement, setRb

Methods inherited from class scale.backend.Instruction

canBeDeleted, clone, copy, defs, ehash, getBBID, getCopyDest, getCopySrc, getDestRegister, getLoopNumber, getNext, getPredicate, getPredicates, getSrcRegisters, getTag, isBranch, isCopy, isLabel, isLoad, isMandatory, isMarker, isPhi, isPredicated, isPredicatedOnTrue, isPrefetch, isSpillInstruction, isSpillLoadPoint, isSpillStorePoint, isStore, markSpillInstruction, mods, nullified, numPredicates, removePredicates, setBBID, setLoopNumber, setMandatory, setNext, setPredicate, setPredicate, setPredicatedOnTrue, setPredicates, setsSpecialReg, setTag, specifyNotSpillLoadPoint, specifySpillStorePoint, uses

Methods inherited from class java.lang.Object

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

Constructor Detail

BarriorInstruction

public BarriorInstruction()

Method Detail

created

public static int created()

Return the number of instances of this class that were created.

nullify

public void nullify(RegisterSet rs)

Mark the instruction as no longer needed.

Overrides:

nullify in class Instruction

assembler

public void assembler(Assembler gen,
                      Emit emit)

Insert the assembler representation of the instruction into the output stream.

Overrides:

assembler in class MemoryInstruction

toString

public java.lang.String toString()

Overrides:

toString in class MemoryInstruction

specifyRegisterUsage

public void specifyRegisterUsage(RegisterAllocator rs,
                                 int index,
                                 int strength)

Specify the registers used by this instruction.

Specified by:

specifyRegisterUsage in class Instruction

Parameters:

rs - is the register set in use

index - is an index associated with the instruction

strength - is the importance of the instruction

See Also:

RegisterAllocator.useRegister(int,int,int), RegisterAllocator.defRegister(int,int)