gem5::branch_prediction::ReturnAddrStack::AddrStack Class Reference

Subclass that implements the actual address stack. More...

#include <ras.hh>

Public Member Functions
	AddrStack (ReturnAddrStack &_parent)
void	init (unsigned numEntries)
	Initializes RAS with a specified number of entries.
void	reset ()
const PCStateBase *	top ()
	Returns the top address on the RAS.
unsigned	topIdx ()
	Returns the index of the top of the RAS.
void	push (const PCStateBase &return_addr)
	Pushes an address onto the RAS.
void	pop ()
	Pops the top address from the RAS.
void	restore (unsigned top_of_stack, const PCStateBase *restored)
	Changes index to the top of the RAS, and replaces the top address with a new target.
bool	empty ()
bool	full ()
std::string	toString (int n)
	Returns the top n entries of the stack as string.
void	incrTos ()
	Increments the top of stack index.
void	decrTos ()
	Decrements the top of stack index.

Public Attributes
std::vector< std::unique_ptr< PCStateBase > >	addrStack
	The Stack itself.
unsigned	numEntries
	The number of entries in the RAS.
unsigned	usedEntries
	The number of used entries in the RAS.
unsigned	tos
	The top of stack index.

Protected Attributes
ReturnAddrStack &	parent

Detailed Description

Subclass that implements the actual address stack.

******

Definition at line 67 of file ras.hh.

Constructor & Destructor Documentation

AddrStack()

gem5::branch_prediction::ReturnAddrStack::AddrStack::AddrStack ( ReturnAddrStack & _parent )

inline

Definition at line 70 of file ras.hh.

References parent, and gem5::branch_prediction::ReturnAddrStack::ReturnAddrStack().

Member Function Documentation

decrTos()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::decrTos ( )

inline

Decrements the top of stack index.

Definition at line 118 of file ras.hh.

References numEntries, and tos.

Referenced by pop().

empty()

bool gem5::branch_prediction::ReturnAddrStack::AddrStack::empty ( )

inline

Definition at line 101 of file ras.hh.

References usedEntries.

full()

bool gem5::branch_prediction::ReturnAddrStack::AddrStack::full ( )

inline

Definition at line 103 of file ras.hh.

References numEntries, and usedEntries.

incrTos()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::incrTos ( )

inline

Increments the top of stack index.

Definition at line 110 of file ras.hh.

References numEntries, and tos.

Referenced by push().

init()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::init

(

unsigned

numEntries

)

Initializes RAS with a specified number of entries.

Parameters

numEntries

Number of entries in the RAS.

Definition at line 55 of file ras.cc.

References addrStack, gem5::ArmISA::i, numEntries, and reset().

pop()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::pop

(

)

Pops the top address from the RAS.

Definition at line 93 of file ras.cc.

References decrTos(), and usedEntries.

push()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::push

(

const PCStateBase &

return_addr

)

Pushes an address onto the RAS.

Definition at line 80 of file ras.cc.

References addrStack, incrTos(), numEntries, gem5::ArmISA::set, tos, and usedEntries.

reset()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::reset

(

)

Definition at line 66 of file ras.cc.

References tos, and usedEntries.

Referenced by init().

restore()

void gem5::branch_prediction::ReturnAddrStack::AddrStack::restore	(	unsigned	top_of_stack,
		const PCStateBase *	restored )

Changes index to the top of the RAS, and replaces the top address with a new target.

Parameters

top_of_stack	the index saved at the time of the prediction.
restored	The new target address of the new top of the RAS.

Definition at line 103 of file ras.cc.

References addrStack, numEntries, gem5::ArmISA::set, tos, and usedEntries.

top()

const PCStateBase * gem5::branch_prediction::ReturnAddrStack::AddrStack::top

(

)

Returns the top address on the RAS.

Definition at line 73 of file ras.cc.

References addrStack, and tos.

topIdx()

unsigned gem5::branch_prediction::ReturnAddrStack::AddrStack::topIdx ( )

inline

Returns the index of the top of the RAS.

Definition at line 86 of file ras.hh.

References tos.

toString()

std::string gem5::branch_prediction::ReturnAddrStack::AddrStack::toString

(

int

n

)

Returns the top n entries of the stack as string.

For debugging.

Definition at line 116 of file ras.cc.

References addrStack, gem5::ArmISA::i, gem5::ArmISA::n, gem5::ArmISA::ss, and tos.

Member Data Documentation

addrStack

std::vector<std::unique_ptr<PCStateBase> > gem5::branch_prediction::ReturnAddrStack::AddrStack::addrStack

The Stack itself.

Definition at line 124 of file ras.hh.

Referenced by init(), push(), restore(), top(), and toString().

numEntries

unsigned gem5::branch_prediction::ReturnAddrStack::AddrStack::numEntries

The number of entries in the RAS.

Definition at line 127 of file ras.hh.

Referenced by decrTos(), full(), incrTos(), init(), push(), and restore().

parent

ReturnAddrStack& gem5::branch_prediction::ReturnAddrStack::AddrStack::parent

protected

Definition at line 136 of file ras.hh.

Referenced by AddrStack().

tos

unsigned gem5::branch_prediction::ReturnAddrStack::AddrStack::tos

The top of stack index.

Definition at line 133 of file ras.hh.

Referenced by decrTos(), incrTos(), push(), reset(), restore(), top(), topIdx(), and toString().

usedEntries

unsigned gem5::branch_prediction::ReturnAddrStack::AddrStack::usedEntries

The number of used entries in the RAS.

Definition at line 130 of file ras.hh.

Referenced by empty(), full(), pop(), push(), reset(), and restore().

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

• cpu/pred/ras.hh
• cpu/pred/ras.cc