scale.backend.ppc
Class MemoryInstruction

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

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

LoadInstruction, StoreInstruction

public class MemoryInstruction
extends FrInstruction

This is the base class for all PPC Memory-format instructions.

$Id: MemoryInstruction.java,v 1.6 2006-11-09 00:56:06 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

protected int	dftn
protected Displacement	displacement The constant value.
protected boolean	macosx
protected int	rd The destination/source register

Fields inherited from class scale.backend.ppc.FrInstruction

ra

Fields inherited from class scale.backend.ppc.PPCInstruction

opcode

Constructor Summary

MemoryInstruction(int opcode, int rd, int ra)

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

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

Method Summary

void	assembler(Assembler asm, Emit emit) Insert the assembler representation of the instruction into the output stream.
boolean	independent(Instruction inst, RegisterSet registers) Return true if this instruction is independent of the specified instruction.
void	remapRegisters(int[] map) Map the virtual registers referenced in the instruction to the specified real registers.
java.lang.String	toString()

Methods inherited from class scale.backend.ppc.FrInstruction

getDestRegister, getSrcRegisters, remapSrcRegister, specifyRegisterUsage, uses

Methods inherited from class scale.backend.ppc.PPCInstruction

assembleDisp, canBeDeleted, defs, 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, mods, 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

Field Detail

rd

protected int rd

The destination/source register

displacement

protected Displacement displacement

The constant value.

dftn

protected int dftn

macosx

protected boolean macosx

Constructor Detail

MemoryInstruction

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

Parameters:

opcode - is the instruction's opcode

rd - is the destination register

ra - is the source register

MemoryInstruction

public MemoryInstruction(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

MemoryInstruction

public MemoryInstruction(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

assembler

public void assembler(Assembler asm,
                      Emit emit)

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

Overrides:

assembler in class FrInstruction

toString

public java.lang.String toString()

Overrides:

toString in class FrInstruction

independent

public boolean independent(Instruction inst,
                           RegisterSet registers)

Return true if this instruction is independent of the specified instruction. If instructions are independent, than one instruction can be moved before or after the other instruction without changing the semantics of the program.

Overrides:

independent in class FrInstruction

Parameters:

inst - is the specified instruction

remapRegisters

public void remapRegisters(int[] map)

Description copied from class: Instruction

Map the virtual registers referenced in the instruction to the specified real registers. The mapping is specified using an array that is indexed by the virtual register to return the real register.

Overrides:

remapRegisters in class FrInstruction

Parameters:

map - maps from the virtual register to real register