Unified register rename map for all classes of registers. More...

#include <rename_map.hh>

Public Types
typedef TheISA::RegIndex	RegIndex

typedef SimpleRenameMap::RenameInfo	RenameInfo

Public Member Functions
	UnifiedRenameMap ()
	Default constructor. More...

	~UnifiedRenameMap ()
	Destructor. More...

void	init (PhysRegFile _regFile, RegIndex _intZeroReg, RegIndex _floatZeroReg, UnifiedFreeList freeList)
	Initializes rename map with given parameters. More...

RenameInfo	rename (RegIndex arch_reg)
	Tell rename map to get a new free physical register to remap the specified architectural register. More...

RenameInfo	renameInt (RegIndex rel_arch_reg)
	Perform rename() on an integer register, given a relative integer register index. More...

RenameInfo	renameFloat (RegIndex rel_arch_reg)
	Perform rename() on a floating-point register, given a relative floating-point register index. More...

RenameInfo	renameCC (RegIndex rel_arch_reg)
	Perform rename() on a condition-code register, given a relative condition-code register index. More...

RenameInfo	renameMisc (RegIndex rel_arch_reg)
	Perform rename() on a misc register, given a relative misc register index. More...

PhysRegIndex	lookup (RegIndex arch_reg) const
	Look up the physical register mapped to an architectural register. More...

PhysRegIndex	lookupInt (RegIndex rel_arch_reg) const
	Perform lookup() on an integer register, given a relative integer register index. More...

PhysRegIndex	lookupFloat (RegIndex rel_arch_reg) const
	Perform lookup() on a floating-point register, given a relative floating-point register index. More...

PhysRegIndex	lookupCC (RegIndex rel_arch_reg) const
	Perform lookup() on a condition-code register, given a relative condition-code register index. More...

PhysRegIndex	lookupMisc (RegIndex rel_arch_reg) const
	Perform lookup() on a misc register, given a relative misc register index. More...

void	setEntry (RegIndex arch_reg, PhysRegIndex phys_reg)
	Update rename map with a specific mapping. More...

void	setIntEntry (RegIndex arch_reg, PhysRegIndex phys_reg)
	Perform setEntry() on an integer register, given a relative integer register index. More...

void	setFloatEntry (RegIndex arch_reg, PhysRegIndex phys_reg)
	Perform setEntry() on a floating-point register, given a relative floating-point register index. More...

void	setCCEntry (RegIndex arch_reg, PhysRegIndex phys_reg)
	Perform setEntry() on a condition-code register, given a relative condition-code register index. More...

unsigned	numFreeEntries () const
	Return the minimum number of free entries across all of the register classes. More...

bool	canRename (uint32_t intRegs, uint32_t floatRegs, uint32_t ccRegs) const
	Return whether there are enough registers to serve the request. More...

Private Attributes
SimpleRenameMap	intMap
	The integer register rename map. More...

SimpleRenameMap	floatMap
	The floating-point register rename map. More...

PhysRegFile *	regFile
	The register file object is used only to distinguish integer from floating-point physical register indices, which in turn is used only for assert statements that make sure the physical register indices that get passed in and handed out are of the proper class. More...

SimpleRenameMap	ccMap
	The condition-code register rename map. More...

Detailed Description

Unified register rename map for all classes of registers.

Wraps a set of class-specific rename maps. Methods that do not specify a register class (e.g., rename()) take unified register indices, while methods that do specify a register class (e.g., renameInt()) take relative register indices. See http://gem5.org/Register_Indexing.

Definition at line 159 of file rename_map.hh.

Member Typedef Documentation

typedef TheISA::RegIndex UnifiedRenameMap::RegIndex

Definition at line 182 of file rename_map.hh.

typedef SimpleRenameMap::RenameInfo UnifiedRenameMap::RenameInfo

Definition at line 184 of file rename_map.hh.

Constructor & Destructor Documentation

UnifiedRenameMap::UnifiedRenameMap ( )

inline

Default constructor.

init() must be called prior to use.

Definition at line 187 of file rename_map.hh.

UnifiedRenameMap::~UnifiedRenameMap ( )

inline

Destructor.

Definition at line 190 of file rename_map.hh.

Member Function Documentation

bool UnifiedRenameMap::canRename	(	uint32_t	intRegs,
		uint32_t	floatRegs,
		uint32_t	ccRegs
	)		const

inline

Return whether there are enough registers to serve the request.

Definition at line 365 of file rename_map.hh.

References ccMap, floatMap, intMap, and SimpleRenameMap::numFreeEntries().

void UnifiedRenameMap::init	(	PhysRegFile *	_regFile,
		RegIndex	_intZeroReg,
		RegIndex	_floatZeroReg,
		UnifiedFreeList *	freeList
	)

Initializes rename map with given parameters.

Definition at line 91 of file rename_map.cc.

References UnifiedFreeList::ccList, ccMap, UnifiedFreeList::floatList, floatMap, SimpleRenameMap::init(), UnifiedFreeList::intList, intMap, AlphaISA::NumCCRegs, AlphaISA::NumFloatRegs, AlphaISA::NumIntRegs, and regFile.

PhysRegIndex UnifiedRenameMap::lookup ( RegIndex arch_reg ) const

Look up the physical register mapped to an architectural register.

This version takes a unified flattened architectural register index and calls the appropriate class-specific rename table.

Parameters

arch_reg The unified architectural register to look up.

Returns: The physical register it is currently mapped to.

Definition at line 132 of file rename_map.cc.

References CCRegClass, FloatRegClass, IntRegClass, lookupCC(), lookupFloat(), lookupInt(), lookupMisc(), MiscRegClass, panic, RegClassStrings, and regIdxToClass().

PhysRegIndex UnifiedRenameMap::lookupCC ( RegIndex rel_arch_reg ) const

inline

Perform lookup() on a condition-code register, given a relative condition-code register index.

Definition at line 292 of file rename_map.hh.

References ccMap, PhysRegFile::isCCPhysReg(), SimpleRenameMap::lookup(), and regFile.

Referenced by lookup().

PhysRegIndex UnifiedRenameMap::lookupFloat ( RegIndex rel_arch_reg ) const

inline

Perform lookup() on a floating-point register, given a relative floating-point register index.

Definition at line 281 of file rename_map.hh.

References floatMap, PhysRegFile::isFloatPhysReg(), SimpleRenameMap::lookup(), and regFile.

Referenced by lookup().

PhysRegIndex UnifiedRenameMap::lookupInt ( RegIndex rel_arch_reg ) const

inline

Perform lookup() on an integer register, given a relative integer register index.

Definition at line 270 of file rename_map.hh.

References intMap, PhysRegFile::isIntPhysReg(), SimpleRenameMap::lookup(), and regFile.

Referenced by lookup().

PhysRegIndex UnifiedRenameMap::lookupMisc ( RegIndex rel_arch_reg ) const

inline

Perform lookup() on a misc register, given a relative misc register index.

Definition at line 303 of file rename_map.hh.

References regFile, and PhysRegFile::totalNumPhysRegs().

Referenced by lookup(), renameMisc(), and setEntry().

unsigned UnifiedRenameMap::numFreeEntries ( ) const

inline

Return the minimum number of free entries across all of the register classes.

The minimum is used so we guarantee that this number of entries is available regardless of which class of registers is requested.

Definition at line 357 of file rename_map.hh.

References floatMap, intMap, and SimpleRenameMap::numFreeEntries().

UnifiedRenameMap::RenameInfo UnifiedRenameMap::rename ( RegIndex arch_reg )

Tell rename map to get a new free physical register to remap the specified architectural register.

This version takes a unified flattened architectural register index and calls the appropriate class-specific rename table.

Parameters

arch_reg The unified architectural register index to remap.

Returns: A RenameInfo pair indicating both the new and previous physical registers.

Definition at line 107 of file rename_map.cc.

References CCRegClass, FloatRegClass, IntRegClass, MiscRegClass, panic, RegClassStrings, regIdxToClass(), renameCC(), renameFloat(), renameInt(), and renameMisc().

RenameInfo UnifiedRenameMap::renameCC ( RegIndex rel_arch_reg )

inline

Perform rename() on a condition-code register, given a relative condition-code register index.

Definition at line 235 of file rename_map.hh.

References ccMap, PhysRegFile::isCCPhysReg(), regFile, and SimpleRenameMap::rename().

Referenced by rename().

RenameInfo UnifiedRenameMap::renameFloat ( RegIndex rel_arch_reg )

inline

Perform rename() on a floating-point register, given a relative floating-point register index.

Definition at line 224 of file rename_map.hh.

References floatMap, PhysRegFile::isFloatPhysReg(), regFile, and SimpleRenameMap::rename().

Referenced by rename().

RenameInfo UnifiedRenameMap::renameInt ( RegIndex rel_arch_reg )

inline

Perform rename() on an integer register, given a relative integer register index.

Definition at line 213 of file rename_map.hh.

References intMap, PhysRegFile::isIntPhysReg(), regFile, and SimpleRenameMap::rename().

Referenced by rename().

RenameInfo UnifiedRenameMap::renameMisc ( RegIndex rel_arch_reg )

inline

Perform rename() on a misc register, given a relative misc register index.

Definition at line 246 of file rename_map.hh.

References lookupMisc().

Referenced by rename().

void UnifiedRenameMap::setCCEntry	(	RegIndex	arch_reg,
		PhysRegIndex	phys_reg
	)

inline

Perform setEntry() on a condition-code register, given a relative condition-code register index.

Definition at line 345 of file rename_map.hh.

References ccMap, PhysRegFile::isCCPhysReg(), regFile, and SimpleRenameMap::setEntry().

Referenced by setEntry().

void UnifiedRenameMap::setEntry	(	RegIndex	arch_reg,
		PhysRegIndex	phys_reg
	)

Update rename map with a specific mapping.

Generally used to roll back to old mappings on a squash. This version takes a unified flattened architectural register index and calls the appropriate class-specific rename table.

Parameters

arch_reg	The unified architectural register to remap.
phys_reg	The physical register to remap it to.

Definition at line 156 of file rename_map.cc.

References CCRegClass, FloatRegClass, IntRegClass, lookupMisc(), MiscRegClass, panic, RegClassStrings, regIdxToClass(), setCCEntry(), setFloatEntry(), and setIntEntry().

void UnifiedRenameMap::setFloatEntry	(	RegIndex	arch_reg,
		PhysRegIndex	phys_reg
	)

inline

Perform setEntry() on a floating-point register, given a relative floating-point register index.

Definition at line 335 of file rename_map.hh.

References floatMap, PhysRegFile::isFloatPhysReg(), regFile, and SimpleRenameMap::setEntry().

Referenced by setEntry().

void UnifiedRenameMap::setIntEntry	(	RegIndex	arch_reg,
		PhysRegIndex	phys_reg
	)

inline

Perform setEntry() on an integer register, given a relative integer register index.

Definition at line 325 of file rename_map.hh.

References intMap, PhysRegFile::isIntPhysReg(), regFile, and SimpleRenameMap::setEntry().

Referenced by setEntry().

Member Data Documentation

SimpleRenameMap UnifiedRenameMap::ccMap

private

The condition-code register rename map.

Definition at line 179 of file rename_map.hh.

Referenced by canRename(), init(), lookupCC(), renameCC(), and setCCEntry().

SimpleRenameMap UnifiedRenameMap::floatMap

private

The floating-point register rename map.

Definition at line 167 of file rename_map.hh.

Referenced by canRename(), init(), lookupFloat(), numFreeEntries(), renameFloat(), and setFloatEntry().

SimpleRenameMap UnifiedRenameMap::intMap

private

The integer register rename map.

Definition at line 164 of file rename_map.hh.

Referenced by canRename(), init(), lookupInt(), numFreeEntries(), renameInt(), and setIntEntry().

PhysRegFile* UnifiedRenameMap::regFile

private

The register file object is used only to distinguish integer from floating-point physical register indices, which in turn is used only for assert statements that make sure the physical register indices that get passed in and handed out are of the proper class.

Definition at line 176 of file rename_map.hh.

Referenced by init(), lookupCC(), lookupFloat(), lookupInt(), lookupMisc(), renameCC(), renameFloat(), renameInt(), setCCEntry(), setFloatEntry(), and setIntEntry().

The documentation for this class was generated from the following files:

cpu/o3/rename_map.hh
cpu/o3/rename_map.cc

Public Types

Public Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation