scale.backend.ppc
Class FDInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.ppc.PPCInstruction
          scale.backend.ppc.FDInstruction

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

FDcInstruction, FDdInstruction, FDrInstruction

public class FDInstruction
extends PPCInstruction

This is the base class for all PPC instructions that have a destination register.

$Id: FDInstruction.java,v 1.5 2006-11-09 00:56:04 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

rd The destination register.

Fields inherited from class scale.backend.ppc.PPCInstruction

opcode

Constructor Summary

FDInstruction(int opcode, int rd)

Method Summary

void	assembler(Assembler asm, Emit emit) Insert the assembler representation of the instruction into the output stream.
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.
void	remapDestRegister(int oldReg, int newReg) Map the registers defined in the instruction as destinations to the specified register.
void	remapRegisters(int[] map) Map the virtual registers referenced in the instruction to the specified real registers.
void	specifyRegisterUsage(RegisterAllocator rs, int index, int strength) Specify the registers used and defined by this instruction.
java.lang.String	toString()

Methods inherited from class scale.backend.ppc.PPCInstruction

assembleDisp, canBeDeleted, getOpcode, independent, instructionSize, isLoad, isStore, remapSrcRegister, setOpcode, uses

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 register.

Constructor Detail

FDInstruction

public FDInstruction(int opcode,
                     int rd)

Parameters:

opcode - is the instruction's opcode

rd - is the destination register

Method Detail

getDestRegister

public int getDestRegister()

Return the destination register or -1 if none.

Overrides:

getDestRegister in class Instruction

getSrcRegisters

public int[] getSrcRegisters()

Return the source registers or null if none.

Overrides:

getSrcRegisters in class Instruction

defs

public boolean defs(int register,
                    RegisterSet registers)

Return true if the instruction sets the register.

Overrides:

defs in class PPCInstruction

remapDestRegister

public void remapDestRegister(int oldReg,
                              int newReg)

Map the registers defined in the instruction as destinations to the specified register. If the register is not used as a destination register, no change is made.

Overrides:

remapDestRegister in class PPCInstruction

Parameters:

oldReg - is the previous destination register

newReg - is the new destination register

specifyRegisterUsage

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

Specify the registers used and defined by this instruction. Uses must be specified before definitions.

Overrides:

specifyRegisterUsage in class PPCInstruction

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)

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 PPCInstruction

Parameters:

map - maps from the virtual register to real register

assembler

public void assembler(Assembler asm,
                      Emit emit)

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

Overrides:

assembler in class PPCInstruction

toString

public java.lang.String toString()

Overrides:

toString in class PPCInstruction