org.jikesrvm.compilers.opt.ir

Class GenericPhysicalRegisterSet

java.lang.Object

org.jikesrvm.compilers.opt.ir.GenericPhysicalRegisterSet

All Implemented Interfaces:

BitSetMapping

Direct Known Subclasses:

PhysicalRegisterSet, PhysicalRegisterSet

public abstract class GenericPhysicalRegisterSet
extends Object
implements BitSetMapping

This class represents a set of Registers corresponding to the physical register set. This class holds the architecture-independent functionality

Implementation Note: Each register has an integer field Register.number. This class must number the physical registers so that get(n) returns an Register r with r.number = n!

Constructor Summary

Constructors

Constructor and Description
GenericPhysicalRegisterSet()

Method Summary

Modifier and Type	Method and Description
PhysicalRegisterSet	asIA32()
PhysicalRegisterSet	asPPC()
abstract Enumeration<Register>	enumerateAll()
abstract Enumeration<Register>	enumerateGPRs()
abstract Enumeration<Register>	enumerateNonvolatileFPRs()
Enumeration<Register>	enumerateNonvolatileFPRsBackwards()
abstract Enumeration<Register>	enumerateNonvolatileGPRs()
Enumeration<Register>	enumerateNonvolatileGPRsBackwards()
abstract Enumeration<Register>	enumerateNonvolatilesBackwards(int type)
abstract Enumeration<Register>	enumerateVolatileFPRs()
abstract Enumeration<Register>	enumerateVolatileGPRs()
abstract Enumeration<Register>	enumerateVolatiles()
abstract Enumeration<Register>	enumerateVolatiles(int type)
abstract Register	get(int n)
abstract Register	getFirstReturnGPR()
abstract Register	getFP()
abstract Register	getFPR(int n)
abstract Register	getGPR(int n)
abstract Register	getGPR(MachineRegister n)
int	getMappedIndex(Object o)
Object	getMappedObject(int n)
int	getMappingSize()
static String	getName(int regnum)
abstract int	getNumberOfPhysicalRegisters()
static int	getPhysicalRegisterType(Register symbReg)
static int	getSize()
static int	getSpillSize(int type)
abstract Register	getTR()
abstract boolean	isAllocatable(Register p)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GenericPhysicalRegisterSet

public GenericPhysicalRegisterSet()

Method Detail

getSize

public static int getSize()

Returns:

the total number of physical registers

getName

public static String getName(int regnum)

Parameters:

regnum - the number of the register in question

Returns:

the register name for a register with a particular number in the pool

getPhysicalRegisterType

public static int getPhysicalRegisterType(Register symbReg)

getSpillSize

public static int getSpillSize(int type)

asIA32

public PhysicalRegisterSet asIA32()

asPPC

public PhysicalRegisterSet asPPC()

isAllocatable

public abstract boolean isAllocatable(Register p)

Parameters:

p - the register in question

Returns:

whether the register is subject to allocation

getNumberOfPhysicalRegisters

public abstract int getNumberOfPhysicalRegisters()

Returns:

the total number of physical registers.

getFP

public abstract Register getFP()

Returns:

the FP register

getTR

public abstract Register getTR()

Returns:

the thread register

getGPR

public abstract Register getGPR(int n)

getGPR

public abstract Register getGPR(MachineRegister n)

Parameters:

n - a register

Returns:

the physical GPR corresponding to n

getFirstReturnGPR

public abstract Register getFirstReturnGPR()

Returns:

the first GPR return

getFPR

public abstract Register getFPR(int n)

get

public abstract Register get(int n)

Parameters:

n - register number

Returns:

the nth physical register in the pool.

enumerateAll

public abstract Enumeration<Register> enumerateAll()

enumerateGPRs

public abstract Enumeration<Register> enumerateGPRs()

enumerateVolatileGPRs

public abstract Enumeration<Register> enumerateVolatileGPRs()

enumerateNonvolatileGPRs

public abstract Enumeration<Register> enumerateNonvolatileGPRs()

enumerateVolatileFPRs

public abstract Enumeration<Register> enumerateVolatileFPRs()

enumerateNonvolatileFPRs

public abstract Enumeration<Register> enumerateNonvolatileFPRs()

enumerateVolatiles

public abstract Enumeration<Register> enumerateVolatiles()

enumerateVolatiles

public abstract Enumeration<Register> enumerateVolatiles(int type)

enumerateNonvolatilesBackwards

public abstract Enumeration<Register> enumerateNonvolatilesBackwards(int type)

enumerateNonvolatileGPRsBackwards

public Enumeration<Register> enumerateNonvolatileGPRsBackwards()

enumerateNonvolatileFPRsBackwards

public Enumeration<Register> enumerateNonvolatileFPRsBackwards()

getMappedObject

public final Object getMappedObject(int n)

Specified by:

getMappedObject in interface BitSetMapping

getMappedIndex

public final int getMappedIndex(Object o)

Specified by:

getMappedIndex in interface BitSetMapping

getMappingSize

public final int getMappingSize()

Specified by:

getMappingSize in interface BitSetMapping