scale.backend.mips
Class MipsInstruction

java.lang.Object
  scale.backend.Instruction
      scale.backend.mips.MipsInstruction

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

CondMovInstruction, FltCmpInstruction, FltOpInstruction, IntOpInstruction, IntOpLitInstruction, LoadImmediateInstruction, LoadInstruction, MFSpecialInstruction, MultInstruction, StoreInstruction, TrapInstruction

public abstract class MipsInstruction
extends Instruction

This is the base class for all Mips instructions except branches.

$Id: MipsInstruction.java,v 1.9 2006-11-16 17:49:37 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
opcode



          the instruction opcode


 



Constructor Summary
MipsInstruction(int opcode)



           
 



Method Summary




 java.lang.String
assembleDisp(Assembler asm,
             Displacement disp,
             int ftn)



          Generate a String representation of a Displacement that can be used by the
 assembly code generater.



 void
assembler(Assembler gen,
          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
getOpcode()



          Return the numeric opcode of the instruction.



 int
instructionSize()



          Return the number of bytes required for all Mips instructions.



 void
remapRegisters(int[] map)



          Map the virtual registers referenced in the instruction to the
 specified real registers.



protected  void
setOpcode(int opcode)



           



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



          Specify the registers used and defined 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.Instruction
canBeDeleted, clone, copy, ehash, getBBID, getCopyDest, getCopySrc, getDestRegister, getExecutionCycles, getFunctionalUnit, getLoopNumber, getNext, getPredicate, getPredicates, getSrcRegisters, getTag, independent, isBranch, isCopy, isLabel, isLoad, isMandatory, isMarker, isPhi, isPredicated, isPredicatedOnTrue, isPrefetch, isSpillInstruction, isSpillLoadPoint, isSpillStorePoint, isStore, markSpillInstruction, mods, nullified, nullify, numPredicates, remapDestRegister, remapSrcRegister, 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



opcode
protected int opcode

the instruction opcode








Constructor Detail



MipsInstruction
public MipsInstruction(int opcode)


Parameters:
opcode - is the instruction's opcode





Method Detail



getOpcode
public int getOpcode()

Description copied from class: Instruction
Return the numeric opcode of the instruction.
 This opcode may be an encoding of the actual instruction opcode.


Specified by:
getOpcode in class Instruction








setOpcode
protected void setOpcode(int opcode)








instructionSize
public int instructionSize()

Return the number of bytes required for all Mips instructions.


Specified by:
instructionSize in class Instruction








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.


Specified by:
specifyRegisterUsage in class Instruction


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 Instruction








defs
public boolean defs(int register,
                    RegisterSet registers)

Return true if the instruction sets the register.


Overrides:
defs in class 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.


Specified by:
remapRegisters in class Instruction


Parameters:
map - maps from the virtual register to real register





assembleDisp
public java.lang.String assembleDisp(Assembler asm,
                                     Displacement disp,
                                     int ftn)

Generate a String representation of a Displacement that can be used by the
 assembly code generater.








assembler
public void assembler(Assembler gen,
                      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 java.lang.Object