scale.backend.ppc
Class LoadInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.ppc.PPCInstruction
          scale.backend.ppc.FrInstruction
              scale.backend.ppc.MemoryInstruction
                  scale.backend.ppc.LoadInstruction

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

LoadxInstruction

public class LoadInstruction
extends MemoryInstruction

This is the base class for all PPC Load instructions.

$Id: LoadInstruction.java,v 1.4 2006-10-04 13:59:21 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.ppc.MemoryInstruction

dftn, displacement, macosx, rd

Fields inherited from class scale.backend.ppc.FrInstruction

ra

Fields inherited from class scale.backend.ppc.PPCInstruction

opcode

Constructor Summary

LoadInstruction(int opcode, int rd, int ra)

LoadInstruction(int opcode, int rd, int ra, Displacement disp)

LoadInstruction(int opcode, int rd, int ra, Displacement disp, int dftn, boolean macosx)

Method Summary

boolean	defs(int register, RegisterSet registers) Return true if the instruction sets the register.
int	getDestRegister() Return the destination register or -1 if none.
int[]	getSrcRegisters() Return the source registers or null if none.
boolean	mods(int register, RegisterSet registers) Return true if the instruction sets the register.
void	specifyRegisterUsage(RegisterAllocator rs, int index, int strength) Specify the registers used by this instruction.

Methods inherited from class scale.backend.ppc.MemoryInstruction

assembler, independent, remapRegisters, toString

Methods inherited from class scale.backend.ppc.FrInstruction

remapSrcRegister, uses

Methods inherited from class scale.backend.ppc.PPCInstruction

assembleDisp, canBeDeleted, getOpcode, instructionSize, isLoad, isStore, remapDestRegister, setOpcode

Methods inherited from class scale.backend.Instruction

clone, copy, ehash, getBBID, getCopyDest, getCopySrc, getExecutionCycles, getFunctionalUnit, getLoopNumber, getNext, getPredicate, getPredicates, getTag, isBranch, isCopy, isLabel, isMandatory, isMarker, isPhi, isPredicated, isPredicatedOnTrue, isPrefetch, isSpillInstruction, isSpillLoadPoint, isSpillStorePoint, markSpillInstruction, nullified, nullify, numPredicates, removePredicates, setBBID, setLoopNumber, setMandatory, setNext, setPredicate, setPredicate, setPredicatedOnTrue, setPredicates, setsSpecialReg, setTag, specifyNotSpillLoadPoint, specifySpillStorePoint

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadInstruction

public LoadInstruction(int opcode,
                       int rd,
                       int ra)

Parameters:

opcode - is the instruction's opcode

rd - is the destination register

ra - is the source register

LoadInstruction

public LoadInstruction(int opcode,
                       int rd,
                       int ra,
                       Displacement disp)

Parameters:

opcode - is the instruction's opcode

rd - is the destination register

ra - is the source register

disp - is the displacement

LoadInstruction

public LoadInstruction(int opcode,
                       int rd,
                       int ra,
                       Displacement disp,
                       int dftn,
                       boolean macosx)

Parameters:

opcode - is the instruction's opcode

rd - is the destination register

ra - is the source register

disp - is the displacement

Method Detail

getDestRegister

public int getDestRegister()

Return the destination register or -1 if none.

Overrides:

getDestRegister in class FrInstruction

getSrcRegisters

public int[] getSrcRegisters()

Return the source registers or null if none.

Overrides:

getSrcRegisters in class FrInstruction

specifyRegisterUsage

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

Specify the registers used by this instruction.

Overrides:

specifyRegisterUsage in class FrInstruction

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)

mods

public boolean mods(int register,
                    RegisterSet registers)

Return true if the instruction sets the register.

Overrides:

mods in class Instruction

defs

public boolean defs(int register,
                    RegisterSet registers)

Return true if the instruction sets the register.

Overrides:

defs in class PPCInstruction