FreeList class that simply holds the list of free integer and floating point registers. More...

#include <free_list.hh>

Public Member Functions
	UnifiedFreeList (const std::string &_my_name, PhysRegFile *_regFile)
	Constructs a free list. More...

std::string	name () const
	Gives the name of the freelist. More...

SimpleFreeList *	getCCList ()
	Returns a pointer to the condition-code free list. More...

PhysRegIndex	getIntReg ()
	Gets a free integer register. More...

PhysRegIndex	getFloatReg ()
	Gets a free fp register. More...

PhysRegIndex	getCCReg ()
	Gets a free cc register. More...

void	addReg (PhysRegIndex freed_reg)
	Adds a register back to the free list. More...

void	addIntReg (PhysRegIndex freed_reg)
	Adds an integer register back to the free list. More...

void	addFloatReg (PhysRegIndex freed_reg)
	Adds a fp register back to the free list. More...

void	addCCReg (PhysRegIndex freed_reg)
	Adds a cc register back to the free list. More...

bool	hasFreeIntRegs () const
	Checks if there are any free integer registers. More...

bool	hasFreeFloatRegs () const
	Checks if there are any free fp registers. More...

bool	hasFreeCCRegs () const
	Checks if there are any free cc registers. More...

unsigned	numFreeIntRegs () const
	Returns the number of free integer registers. More...

unsigned	numFreeFloatRegs () const
	Returns the number of free fp registers. More...

unsigned	numFreeCCRegs () const
	Returns the number of free cc registers. More...

Private Attributes
const std::string	_name
	The object name, for DPRINTF. More...

SimpleFreeList	intList
	The list of free integer registers. More...

SimpleFreeList	floatList
	The list of free floating point registers. More...

SimpleFreeList	ccList
	The list of free condition-code registers. More...

PhysRegFile *	regFile
	The register file object is used only to distinguish integer from floating-point physical register indices. More...

Friends
class	UnifiedRenameMap

Detailed Description

FreeList class that simply holds the list of free integer and floating point registers.

Can request for a free register of either type, and also send back free registers of either type. This is a very simple class, but it should be sufficient for most implementations. Like all other classes, it assumes that the indices for the floating point registers starts after the integer registers end. Hence the variable numPhysicalIntRegs is logically equivalent to the baseFP dependency. Note that while this most likely should be called FreeList, the name "FreeList" is used in a typedef within the CPU Policy, and therefore no class can be named simply "FreeList".

Todo:: : Give a better name to the base FP dependency.

Definition at line 95 of file free_list.hh.

Constructor & Destructor Documentation

UnifiedFreeList::UnifiedFreeList	(	const std::string &	_my_name,
		PhysRegFile *	_regFile
	)

Constructs a free list.

Parameters

_numPhysicalIntRegs	Number of physical integer registers.
reservedIntRegs	Number of integer registers already used by initial mappings.
_numPhysicalFloatRegs	Number of physical fp registers.
reservedFloatRegs	Number of fp registers already used by initial mappings.

Definition at line 39 of file free_list.cc.

References DPRINTF, PhysRegFile::initFreeList(), and regFile.