scale.backend.ppc
Class FrrrInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.ppc.PPCInstruction
          scale.backend.ppc.FrInstruction
              scale.backend.ppc.FrrInstruction
                  scale.backend.ppc.FrrrInstruction

All Implemented Interfaces:

java.lang.Cloneable

public class FrrrInstruction
extends FrrInstruction

This is the base class for all PPC instructions that three source registers.

$Id: FrrrInstruction.java,v 1.4 2006-11-09 00:56:05 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

rc The third source register.

Fields inherited from class scale.backend.ppc.FrrInstruction

rb

Fields inherited from class scale.backend.ppc.FrInstruction

ra

Fields inherited from class scale.backend.ppc.PPCInstruction

opcode

Constructor Summary

FrrrInstruction(int opcode, int ra, int rb, int rc)

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.
void	remapSrcRegister(int oldReg, int newReg) Map the registers used in the instruction as sources to the specified register.
void	specifyRegisterUsage(RegisterAllocator rs, int index, int strength) Specify the registers used by this instruction.
java.lang.String	toString()
boolean	uses(int register, RegisterSet registers) Return true if the instruction uses the register.

Methods inherited from class scale.backend.ppc.FrrInstruction

getDestRegister, getSrcRegisters

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

rc

protected int rc

The third source register.

Constructor Detail

FrrrInstruction

public FrrrInstruction(int opcode,
                       int ra,
                       int rb,
                       int rc)

Parameters:

opcode - is the instruction's opcode

ra - is the first source register

rb - is the second source register

rc - is the third source register

Method Detail

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 FrrInstruction

Parameters:

map - maps from the virtual register to real register

remapSrcRegister

public void remapSrcRegister(int oldReg,
                             int newReg)

Map the registers used in the instruction as sources to the specified register. If the register is not used as a source register, no change is made.

Overrides:

remapSrcRegister in class FrrInstruction

Parameters:

oldReg - is the previous source register

newReg - is the new source register

specifyRegisterUsage

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

Specify the registers used by this instruction.

Overrides:

specifyRegisterUsage in class FrrInstruction

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)

uses

public boolean uses(int register,
                    RegisterSet registers)

Return true if the instruction uses the register.

Overrides:

uses in class FrrInstruction

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 FrrInstruction

Parameters:

inst - is the specified instruction

assembler

public void assembler(Assembler asm,
                      Emit emit)

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

Overrides:

assembler in class FrrInstruction

toString

public java.lang.String toString()

Overrides:

toString in class FrrInstruction