gem5::o3::Scoreboard Class Reference

Implements a simple scoreboard to track which registers are ready. More...

#include <scoreboard.hh>

Public Member Functions
	Scoreboard (const std::string &_my_name, unsigned _numPhysicalRegs, RegIndex _zero_reg)
	Constructs a scoreboard. More...
	~Scoreboard ()
	Destructor. More...
std::string	name () const
	Returns the name of the scoreboard. More...
bool	getReg (PhysRegIdPtr phys_reg) const
	Checks if the register is ready. More...
void	setReg (PhysRegIdPtr phys_reg)
	Sets the register as ready. More...
void	unsetReg (PhysRegIdPtr phys_reg)
	Sets the register as not ready. More...

Private Attributes
const std::string	_name
	The object name, for DPRINTF. More...
const RegIndex	zeroReg
	Index of the zero integer register. More...
std::vector< bool >	regScoreBoard
	Scoreboard of physical integer registers, saying whether or not they are ready. More...
GEM5_CLASS_VAR_USED unsigned	numPhysRegs
	The number of actual physical registers. More...

Detailed Description

Implements a simple scoreboard to track which registers are ready.

This class operates on the unified physical register space, because the different classes of registers do not need to be distinguished. Registers being part of a fixed mapping are always considered ready.

Definition at line 53 of file scoreboard.hh.

Constructor & Destructor Documentation

Scoreboard()

gem5::o3::Scoreboard::Scoreboard	(	const std::string &	_my_name,
		unsigned	_numPhysicalRegs,
		RegIndex	_zero_reg
	)

Constructs a scoreboard.

Parameters

_numPhysicalRegs	Number of physical registers.
_numMiscRegs	Number of miscellaneous registers.

Definition at line 38 of file scoreboard.cc.

~Scoreboard()

gem5::o3::Scoreboard::~Scoreboard ( )

inline

Destructor.

Definition at line 79 of file scoreboard.hh.

Member Function Documentation

getReg()

bool gem5::o3::Scoreboard::getReg ( PhysRegIdPtr  phys_reg ) const

inline

Checks if the register is ready.

Definition at line 86 of file scoreboard.hh.

References gem5::PhysRegId::flatIndex(), gem5::PhysRegId::index(), gem5::IntRegClass, gem5::PhysRegId::is(), gem5::PhysRegId::isFixedMapping(), numPhysRegs, regScoreBoard, and zeroReg.

Referenced by gem5::o3::Rename::renameSrcRegs().

name()

std::string gem5::o3::Scoreboard::name ( ) const

inline

Returns the name of the scoreboard.

Definition at line 82 of file scoreboard.hh.

References _name.

setReg()

void gem5::o3::Scoreboard::setReg ( PhysRegIdPtr  phys_reg )

inline

Sets the register as ready.

Definition at line 105 of file scoreboard.hh.

References gem5::PhysRegId::className(), DPRINTF, gem5::PhysRegId::flatIndex(), gem5::PhysRegId::index(), gem5::PhysRegId::isFixedMapping(), numPhysRegs, and regScoreBoard.

Referenced by gem5::o3::CPU::insertThread(), gem5::o3::CPU::setVectorsAsReady(), and gem5::o3::IEW::writebackInsts().

unsetReg()

void gem5::o3::Scoreboard::unsetReg ( PhysRegIdPtr  phys_reg )

inline

Sets the register as not ready.

Definition at line 123 of file scoreboard.hh.

References gem5::PhysRegId::flatIndex(), gem5::PhysRegId::index(), gem5::IntRegClass, gem5::PhysRegId::is(), gem5::PhysRegId::isFixedMapping(), numPhysRegs, regScoreBoard, and zeroReg.

Referenced by gem5::o3::Rename::renameDestRegs().

Member Data Documentation

_name

const std::string gem5::o3::Scoreboard::_name

private

The object name, for DPRINTF.

We have to declare this explicitly because Scoreboard is not a SimObject.

Definition at line 58 of file scoreboard.hh.

Referenced by name().

numPhysRegs

GEM5_CLASS_VAR_USED unsigned gem5::o3::Scoreboard::numPhysRegs

private

The number of actual physical registers.

Definition at line 68 of file scoreboard.hh.

Referenced by getReg(), setReg(), and unsetReg().

regScoreBoard

std::vector<bool> gem5::o3::Scoreboard::regScoreBoard

private

Scoreboard of physical integer registers, saying whether or not they are ready.

Definition at line 65 of file scoreboard.hh.

Referenced by getReg(), setReg(), and unsetReg().

zeroReg

const RegIndex gem5::o3::Scoreboard::zeroReg

private

Index of the zero integer register.

Definition at line 61 of file scoreboard.hh.

Referenced by getReg(), and unsetReg().

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

• cpu/o3/scoreboard.hh
• cpu/o3/scoreboard.cc