scale.backend.sparc
Class JmplInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.Branch
          scale.backend.sparc.SparcBranch
              scale.backend.sparc.JmplInstruction

All Implemented Interfaces:

java.lang.Cloneable

public class JmplInstruction
extends SparcBranch

This class represents the Sparc jump & link instruction.

$Id: JmplInstruction.java,v 1.23 2006-11-16 17:49:38 burrill Exp $

Copyright 2005 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

Instance=05, Op=1x, op3=111000

Field Summary

protected int	rd the rd register.
protected int	rs1 the rs1 register.
protected int	rs2 the rs2 register

Fields inherited from class scale.backend.sparc.SparcBranch

annulled, delaySlot, opcode, pt

Constructor Summary

JmplInstruction(int rs1, int rs2, int rd, int numTargets, SparcInstruction delaySlot)

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	getRs1()
int	getRs2()
int[]	getSrcRegisters() Return the source registers or null if none.
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.
protected void	setReturnedStructSize(int size) Specifiy the size of the struct returned by the call or 0 if none.
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.sparc.SparcBranch

assembleDelay, assembleDisp, canBeAnnulled, canBeDeleted, delayToStringBuf, getAnnulled, getDelaySlot, getOpcode, getPt, instructionSize, isUnconditional, mods, remapDestRegister, remapSrcRegister, setAnnulled, setDelaySlot, setOpcode

Methods inherited from class scale.backend.Branch

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

Methods inherited from class scale.backend.Instruction

clone, ehash, getBBID, getCopyDest, getCopySrc, getFunctionalUnit, getLoopNumber, getNext, getPredicate, getPredicates, 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

rd

protected int rd

the rd register.

rs1

protected int rs1

the rs1 register.

rs2

protected int rs2

the rs2 register

Constructor Detail

JmplInstruction

public JmplInstruction(int rs1,
                       int rs2,
                       int rd,
                       int numTargets,
                       SparcInstruction delaySlot)

Parameters:

numTargets - is the number of possible next instructions

delaySlot - is the delay slot instruction or null

Method Detail

setReturnedStructSize

protected void setReturnedStructSize(int size)

Specifiy the size of the struct returned by the call or 0 if none.

Overrides:

setReturnedStructSize in class SparcBranch

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

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 SparcBranch

Parameters:

map - maps from the virtual register to real register

getRs1

public int getRs1()

getRs2

public int getRs2()

uses

public boolean uses(int register,
                    RegisterSet registers)

Return true if the instruction uses the register.

Overrides:

uses in class SparcBranch

defs

public boolean defs(int register,
                    RegisterSet registers)

Return true if the instruction sets the register.

Overrides:

defs in class SparcBranch

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 Branch

Parameters:

inst - is the specified instruction

specifyRegisterUsage

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

Specify the registers used by this instruction.

Overrides:

specifyRegisterUsage in class SparcBranch

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)

assembler

public void assembler(Assembler asm,
                      Emit emit)

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

Specified by:

assembler in class Instruction

toString

public java.lang.String toString()

Overrides:

toString in class Branch