Simple physical register file class. More...

#include <regfile.hh>

Classes
union	PhysFloatReg

Public Member Functions
	PhysRegFile (unsigned _numPhysicalIntRegs, unsigned _numPhysicalFloatRegs, unsigned _numPhysicalCCRegs)
	Constructs a physical register file with the specified amount of integer and floating point registers. More...

	~PhysRegFile ()
	Destructor to free resources. More...

void	initFreeList (UnifiedFreeList *freeList)
	Initialize the free list. More...

unsigned	numIntPhysRegs () const

unsigned	numFloatPhysRegs () const

unsigned	numCCPhysRegs () const

unsigned	totalNumPhysRegs () const

bool	isIntPhysReg (PhysRegIndex reg_idx) const

bool	isFloatPhysReg (PhysRegIndex reg_idx) const

bool	isCCPhysReg (PhysRegIndex reg_idx)
	Return true if the specified physical register index corresponds to a condition-code physical register. More...

uint64_t	readIntReg (PhysRegIndex reg_idx) const
	Reads an integer register. More...

FloatReg	readFloatReg (PhysRegIndex reg_idx) const
	Reads a floating point register (double precision). More...

FloatRegBits	readFloatRegBits (PhysRegIndex reg_idx) const

CCReg	readCCReg (PhysRegIndex reg_idx)
	Reads a condition-code register. More...

void	setIntReg (PhysRegIndex reg_idx, uint64_t val)
	Sets an integer register to the given value. More...

void	setFloatReg (PhysRegIndex reg_idx, FloatReg val)
	Sets a double precision floating point register to the given value. More...

void	setFloatRegBits (PhysRegIndex reg_idx, FloatRegBits val)

void	setCCReg (PhysRegIndex reg_idx, CCReg val)
	Sets a condition-code register to the given value. More...

Private Types
typedef TheISA::IntReg	IntReg

typedef TheISA::FloatReg	FloatReg

typedef TheISA::FloatRegBits	FloatRegBits

typedef TheISA::CCReg	CCReg

Private Attributes
std::vector< IntReg >	intRegFile
	Integer register file. More...

std::vector< PhysFloatReg >	floatRegFile
	Floating point register file. More...

std::vector< CCReg >	ccRegFile
	Condition-code register file. More...

unsigned	baseFloatRegIndex
	The first floating-point physical register index. More...

unsigned	baseCCRegIndex
	The first condition-code physical register index. More...

unsigned	totalNumRegs
	Total number of physical registers. More...

Detailed Description

Simple physical register file class.

Definition at line 51 of file regfile.hh.

Member Typedef Documentation

typedef TheISA::CCReg PhysRegFile::CCReg

private

Definition at line 58 of file regfile.hh.

typedef TheISA::FloatReg PhysRegFile::FloatReg

private

Definition at line 56 of file regfile.hh.

typedef TheISA::FloatRegBits PhysRegFile::FloatRegBits

private

Definition at line 57 of file regfile.hh.

typedef TheISA::IntReg PhysRegFile::IntReg

private

Definition at line 55 of file regfile.hh.

Constructor & Destructor Documentation

PhysRegFile::PhysRegFile	(	unsigned	_numPhysicalIntRegs,
		unsigned	_numPhysicalFloatRegs,
		unsigned	_numPhysicalCCRegs
	)

Constructs a physical register file with the specified amount of integer and floating point registers.

Definition at line 38 of file regfile.cc.

References AlphaISA::NumCCRegs, and warn.

PhysRegFile::~PhysRegFile ( )

inline

Destructor to free resources.

Definition at line 111 of file regfile.hh.

Member Function Documentation

void PhysRegFile::initFreeList ( UnifiedFreeList * freeList )

Initialize the free list.

Definition at line 60 of file regfile.cc.

References UnifiedFreeList::addCCReg(), UnifiedFreeList::addFloatReg(), UnifiedFreeList::addIntReg(), baseCCRegIndex, baseFloatRegIndex, and totalNumRegs.

Referenced by UnifiedFreeList::UnifiedFreeList().

bool PhysRegFile::isCCPhysReg ( PhysRegIndex reg_idx )

inline

Return true if the specified physical register index corresponds to a condition-code physical register.

Definition at line 152 of file regfile.hh.

References baseCCRegIndex, and totalNumRegs.

Referenced by UnifiedFreeList::addReg(), UnifiedRenameMap::lookupCC(), readCCReg(), UnifiedRenameMap::renameCC(), UnifiedRenameMap::setCCEntry(), and setCCReg().

bool PhysRegFile::isFloatPhysReg ( PhysRegIndex reg_idx ) const

inline

Returns: true if the specified physical register index corresponds to a floating-point physical register.

Definition at line 143 of file regfile.hh.

References baseCCRegIndex, and baseFloatRegIndex.

Referenced by UnifiedFreeList::addReg(), UnifiedRenameMap::lookupFloat(), readFloatReg(), readFloatRegBits(), UnifiedRenameMap::renameFloat(), UnifiedRenameMap::setFloatEntry(), setFloatReg(), and setFloatRegBits().

bool PhysRegFile::isIntPhysReg ( PhysRegIndex reg_idx ) const

inline

Returns: true if the specified physical register index corresponds to an integer physical register.

Definition at line 134 of file regfile.hh.

References baseFloatRegIndex.

Referenced by UnifiedFreeList::addReg(), UnifiedRenameMap::lookupInt(), readIntReg(), UnifiedRenameMap::renameInt(), UnifiedRenameMap::setIntEntry(), and setIntReg().

unsigned PhysRegFile::numCCPhysRegs ( ) const

inline

Returns: the number of condition-code physical registers.

Definition at line 124 of file regfile.hh.

References baseCCRegIndex, and totalNumRegs.

unsigned PhysRegFile::numFloatPhysRegs ( ) const

inline

Returns: the number of floating-point physical registers.

Definition at line 120 of file regfile.hh.

References baseCCRegIndex, and baseFloatRegIndex.

unsigned PhysRegFile::numIntPhysRegs ( ) const

inline

Returns: the number of integer physical registers.

Definition at line 117 of file regfile.hh.

References baseFloatRegIndex.

CCReg PhysRegFile::readCCReg ( PhysRegIndex reg_idx )

inline

Reads a condition-code register.

Definition at line 197 of file regfile.hh.

References baseCCRegIndex, ccRegFile, DPRINTF, and isCCPhysReg().

FloatReg PhysRegFile::readFloatReg ( PhysRegIndex reg_idx ) const

inline

Reads a floating point register (double precision).

Definition at line 168 of file regfile.hh.

References baseFloatRegIndex, DPRINTF, floatRegFile, isFloatPhysReg(), and ArmISA::q.

FloatRegBits PhysRegFile::readFloatRegBits ( PhysRegIndex reg_idx ) const

inline

Definition at line 181 of file regfile.hh.

References baseFloatRegIndex, DPRINTF, floatRegFile, and isFloatPhysReg().

uint64_t PhysRegFile::readIntReg ( PhysRegIndex reg_idx ) const

inline

Reads an integer register.

Definition at line 158 of file regfile.hh.

References DPRINTF, intRegFile, and isIntPhysReg().

void PhysRegFile::setCCReg	(	PhysRegIndex	reg_idx,
		CCReg	val
	)

inline

Sets a condition-code register to the given value.

Definition at line 253 of file regfile.hh.

References baseCCRegIndex, ccRegFile, DPRINTF, isCCPhysReg(), and X86ISA::val.

void PhysRegFile::setFloatReg	(	PhysRegIndex	reg_idx,
		FloatReg	val
	)

inline

Sets a double precision floating point register to the given value.

Definition at line 223 of file regfile.hh.

References baseFloatRegIndex, DPRINTF, floatRegFile, isFloatPhysReg(), X86ISA::val, and AlphaISA::ZeroReg.

void PhysRegFile::setFloatRegBits	(	PhysRegIndex	reg_idx,
		FloatRegBits	val
	)

inline

Definition at line 239 of file regfile.hh.

References baseFloatRegIndex, DPRINTF, floatRegFile, isFloatPhysReg(), and X86ISA::val.

void PhysRegFile::setIntReg	(	PhysRegIndex	reg_idx,
		uint64_t	val
	)

inline

Sets an integer register to the given value.

Definition at line 211 of file regfile.hh.

References DPRINTF, intRegFile, isIntPhysReg(), X86ISA::val, and AlphaISA::ZeroReg.

unsigned PhysRegFile::totalNumPhysRegs ( ) const

inline

Returns: the total number of physical registers.

Definition at line 128 of file regfile.hh.

References totalNumRegs.

Referenced by UnifiedRenameMap::lookupMisc().

Member Data Documentation

unsigned PhysRegFile::baseCCRegIndex

private

The first condition-code physical register index.

The condition-code registers follow the floating-point registers.

Definition at line 94 of file regfile.hh.

Referenced by initFreeList(), isCCPhysReg(), isFloatPhysReg(), numCCPhysRegs(), numFloatPhysRegs(), readCCReg(), and setCCReg().

unsigned PhysRegFile::baseFloatRegIndex

private

The first floating-point physical register index.

The physical register file has a single continuous index space, with the initial indices mapping to the integer registers, followed immediately by the floating-point registers. Thus the first floating-point index is equal to the number of integer registers.

Note that this internal organizational detail on how physical register file indices are ordered should NOT be exposed outside of this class. Other classes can use the is*PhysReg() methods to map from a physical register index to a class without knowing the internal structure of the index map.

Definition at line 88 of file regfile.hh.

Referenced by initFreeList(), isFloatPhysReg(), isIntPhysReg(), numFloatPhysRegs(), numIntPhysRegs(), readFloatReg(), readFloatRegBits(), setFloatReg(), and setFloatRegBits().