scale.backend.ppc
Class PPCG4RegisterSet

java.lang.Object
  scale.backend.RegisterSet
      scale.backend.ppc.PPCRegisterSet
          scale.backend.ppc.PPCG4RegisterSet

public class PPCG4RegisterSet
extends PPCRegisterSet

This class describes the register set of the G4 PowerPC.

$Id: PPCG4RegisterSet.java,v 1.12 2007-10-04 19:57:55 burrill Exp $

Copyright 2007 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

The PPC has 67 programmable registers. The first 32 registers are used for integer values and addresses. This includes the stack pointer and other housekeeping registers. Registers 32 through 62 are used for floating point values.

Field Summary

static short[]	actualRegisters The types of real registers on the PPC.
static short[]	calleeSavesLinux The registers that a callee must save and restore if they are used by the callee.
static short[]	calleeSavesMacosx The registers that a callee must save and restore if they are used by the callee.
static short[]	calleeUsesLinux The registers that a callee can use without saving and restoring.
static short[]	calleeUsesMacosx The registers that a callee can use without saving and restoring.
static int	FREG_SIZE Size in bytes of integer register.
static int	IREG_SIZE Size in bytes of integer register.
static short[]	preferredOrder The preferred order in which registers should be allocated.

Fields inherited from class scale.backend.ppc.PPCRegisterSet

FFA_REG, FIA_REG, FR_REG, IR_REG, LFA_REG_LINUX, LFA_REG_MACOSX, LIA_REG, SP_REG, TOC_REG

Fields inherited from class scale.backend.RegisterSet

ADRREG, AFIREG, AIREG, checkMask, CNTREG, DBLEREG, FIREG, FLTREG, INTREG, nextRegister, PAIRREG, QUADREG, RDREG, registers, sizeMask, SPCREG, typeMask

Constructor Summary

PPCG4RegisterSet(boolean macosx)

Method Summary

int	actualRegister(int reg) For architecture where a pseudo register are mapped onto actual registers, return the actual register.
short[]	getCalleeSaves() Return the callee saves registers.
short[]	getCalleeUses() Return the callee uses registers.
short[]	getPreferredOrder() Return a mapping from an order index to a real register number.
int	rangeBegin(int reg) Return the first real register that is affected when this register is modified.
int	rangeEnd(int reg) Return the last real register that is affected when this register is modified.
java.lang.String	registerName(int reg) Convert a register number into its assembly language form.
int	tempRegisterType(int type, int bs) Return the type with the size information added.
int	tempRegisterType(Type type, long bs) Return the register type with the size information added.

Methods inherited from class scale.backend.ppc.PPCRegisterSet

numAllocatableRegisters, registerSize

Methods inherited from class scale.backend.RegisterSet

adrRegister, compatible, compatibleNS, continueRegister, display, doubleRegister, floatRegister, getResultRegister, getType, initialize, intRegister, isAdrType, isContinueType, isDoubleType, isFloatType, isIntType, isModType, isPairType, isQuadType, isReadOnlyType, isSpecialType, lastRegister, modRegister, newTempRegister, numContiguousRegisters, numContiguousType, numRealRegisters, numRegisters, pairRegister, quadRegister, readOnlyRegister, setResultRegister, specialRegister, tempRegister, useContiguous, virtualRegister

Methods inherited from class java.lang.Object

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

Field Detail

IREG_SIZE

public static final int IREG_SIZE

Size in bytes of integer register.

See Also:

Constant Field Values

FREG_SIZE

public static final int FREG_SIZE

Size in bytes of integer register.

See Also:

Constant Field Values

actualRegisters

public static final short[] actualRegisters

The types of real registers on the PPC.

preferredOrder

public static final short[] preferredOrder

The preferred order in which registers should be allocated. This array must be the same length as actualRegisters.

calleeUsesLinux

public static final short[] calleeUsesLinux

The registers that a callee can use without saving and restoring.

calleeUsesMacosx

public static final short[] calleeUsesMacosx

The registers that a callee can use without saving and restoring.

calleeSavesMacosx

public static final short[] calleeSavesMacosx

The registers that a callee must save and restore if they are used by the callee.

calleeSavesLinux

public static final short[] calleeSavesLinux

The registers that a callee must save and restore if they are used by the callee.

Constructor Detail

PPCG4RegisterSet

public PPCG4RegisterSet(boolean macosx)

Method Detail

registerName

public java.lang.String registerName(int reg)

Convert a register number into its assembly language form.

Specified by:

registerName in class RegisterSet

getPreferredOrder

public short[] getPreferredOrder()

Return a mapping from an order index to a real register number. This mapping allows the order of allocation of real registers to be specified.

Overrides:

getPreferredOrder in class RegisterSet

getCalleeSaves

public short[] getCalleeSaves()

Return the callee saves registers.

Specified by:

getCalleeSaves in class RegisterSet

getCalleeUses

public short[] getCalleeUses()

Return the callee uses registers.

Specified by:

getCalleeUses in class RegisterSet

rangeBegin

public final int rangeBegin(int reg)

Return the first real register that is affected when this register is modified.

Overrides:

rangeBegin in class RegisterSet

rangeEnd

public final int rangeEnd(int reg)

Return the last real register that is affected when this register is modified.

Overrides:

rangeEnd in class RegisterSet

actualRegister

public int actualRegister(int reg)

For architecture where a pseudo register are mapped onto actual registers, return the actual register. An example is shown by the SparcV8RegisterSet where a 64-bit long long register is mapped onto a set of two 32-bit registers.

Overrides:

actualRegister in class RegisterSet

tempRegisterType

public int tempRegisterType(Type type,
                            long bs)

Return the register type with the size information added.

Specified by:

tempRegisterType in class RegisterSet

Parameters:

type - is the type required

bs - is the size required

tempRegisterType

public int tempRegisterType(int type,
                            int bs)

Return the type with the size information added.

Overrides:

tempRegisterType in class RegisterSet

Parameters:

type - is the type required

bs - is the size required