scale.backend.x86
Class X86RBranch

java.lang.Object
  scale.backend.Instruction
      scale.backend.Branch
          scale.backend.x86.X86Branch
              scale.backend.x86.X86RBranch

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

X86RDBranch, X86RRBranch

public class X86RBranch
extends X86Branch

This is the base class for all X86 branches that reference just a register.

$Id$

Copyright 2008 by James H. Burrill
All Rights Reserved.

Field Summary

protected int

reg

Fields inherited from class scale.backend.x86.X86Branch

opcode, pt

Constructor Summary

X86RBranch(int opcode, boolean pt, int numTargets, int reg)

Method Summary

void	assembler(Assembler asm, Emit emit) Insert the assembler representation of the instruction into the output stream.
protected boolean	checkForm(int opcode)
int	getReg()
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	setReg(int reg)
java.lang.String	toString()
boolean	uses(int register, RegisterSet registers) Return true if the instruction uses the register.

Methods inherited from class scale.backend.x86.X86Branch

assembleDisp, buildAddress, canBeDeleted, defs, getDisplacement, getOpcode, getOperandSize, getOperandSizeLabel, getPt, getReg2, instructionSize, isReversed, isUnconditional, mods, remapDestRegister, setDisplacement, setOpcode, setOperandSize, setReg2, setReturnedStructSize, setScale, specifyRegisterUsage

Methods inherited from class scale.backend.Branch

additionalRegsKilled, additionalRegsSet, additionalRegsUsed, addTarget, copy, getBranchProbability, getExecutionCycles, getRegsKilled, getTarget, independent, isBranch, isCall, markAsCall, nullify, numTargets, setBranchProbability, uses

Methods inherited from class scale.backend.Instruction

clone, ehash, getBBID, getCopyDest, getCopySrc, getDestRegister, getFunctionalUnit, getLoopNumber, getNext, getPredicate, getPredicates, getSrcRegisters, getTag, isCopy, isLabel, isLoad, isMandatory, isMarker, isPhi, isPredicated, isPredicatedOnTrue, isPrefetch, isSpillInstruction, isSpillLoadPoint, isSpillStorePoint, isStore, markSpillInstruction, nullified, 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

reg

protected int reg

Constructor Detail

X86RBranch

public X86RBranch(int opcode,
                  boolean pt,
                  int numTargets,
                  int reg)

Method Detail

checkForm

protected boolean checkForm(int opcode)

Overrides:

checkForm in class X86Branch

getReg

public int getReg()

Overrides:

getReg in class X86Branch

setReg

public void setReg(int reg)

Overrides:

setReg in class X86Branch

remapRegisters

public void remapRegisters(int[] map)

Description copied from class: Branch

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 X86Branch

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 X86Branch

Parameters:

oldReg - is the previous source register

newReg - is the new source register

uses

public boolean uses(int register,
                    RegisterSet registers)

Return true if the instruction uses the register.

Overrides:

uses in class X86Branch

assembler

public void assembler(Assembler asm,
                      Emit emit)

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

Overrides:

assembler in class X86Branch

toString

public java.lang.String toString()

Overrides:

toString in class X86Branch