IndirectPredictor Class Reference

#include <indirect.hh>

Classes
struct	HistoryEntry
struct	IPredEntry
struct	ThreadInfo

Public Member Functions
	IndirectPredictor (bool hash_ghr, bool hash_targets, unsigned num_sets, unsigned num_ways, unsigned tag_bits, unsigned path_len, unsigned inst_shift, unsigned num_threads)
bool	lookup (Addr br_addr, unsigned ghr, TheISA::PCState &br_target, ThreadID tid)
void	recordIndirect (Addr br_addr, Addr tgt_addr, InstSeqNum seq_num, ThreadID tid)
void	commit (InstSeqNum seq_num, ThreadID tid)
void	squash (InstSeqNum seq_num, ThreadID tid)
void	recordTarget (InstSeqNum seq_num, unsigned ghr, const TheISA::PCState &target, ThreadID tid)

Private Member Functions
Addr	getSetIndex (Addr br_addr, unsigned ghr, ThreadID tid)
Addr	getTag (Addr br_addr)

Private Attributes
const bool	hashGHR
const bool	hashTargets
const unsigned	numSets
const unsigned	numWays
const unsigned	tagBits
const unsigned	pathLength
const unsigned	instShift
std::vector< std::vector < IPredEntry > >	targetCache
std::vector< ThreadInfo >	threadInfo

Detailed Description

Definition at line 40 of file indirect.hh.

Constructor & Destructor Documentation

IndirectPredictor::IndirectPredictor	(	bool	hash_ghr,
		bool	hash_targets,
		unsigned	num_sets,
		unsigned	num_ways,
		unsigned	tag_bits,
		unsigned	path_len,
		unsigned	inst_shift,
		unsigned	num_threads
	)

Definition at line 36 of file indirect.cc.

References ArmISA::i, isPowerOf2(), numSets, numWays, panic, targetCache, and threadInfo.

Member Function Documentation

void IndirectPredictor::commit	(	InstSeqNum	seq_num,
		ThreadID	tid
	)

Definition at line 88 of file indirect.cc.

References DPRINTF, IndirectPredictor::ThreadInfo::headHistEntry, IndirectPredictor::ThreadInfo::pathHist, pathLength, and threadInfo.

Referenced by BPredUnit::update().

Addr IndirectPredictor::getSetIndex ( Addr  br_addr, unsigned  ghr, ThreadID  tid  )

inlineprivate

Definition at line 162 of file indirect.cc.

References floorLog2(), hashGHR, hashTargets, ArmISA::i, instShift, numSets, MipsISA::p, IndirectPredictor::ThreadInfo::pathHist, pathLength, and threadInfo.

Referenced by lookup(), and recordTarget().

Addr IndirectPredictor::getTag ( Addr  br_addr )

inlineprivate

Definition at line 182 of file indirect.cc.

References instShift, and tagBits.

Referenced by lookup(), and recordTarget().

bool IndirectPredictor::lookup	(	Addr	br_addr,
		unsigned	ghr,
		TheISA::PCState &	br_target,
		ThreadID	tid
	)

Definition at line 57 of file indirect.cc.

References DPRINTF, getSetIndex(), getTag(), numSets, and targetCache.

Referenced by BPredUnit::predict().

void IndirectPredictor::recordIndirect	(	Addr	br_addr,
		Addr	tgt_addr,
		InstSeqNum	seq_num,
		ThreadID	tid
	)

Definition at line 79 of file indirect.cc.

References DPRINTF, and threadInfo.

Referenced by BPredUnit::predict().

void IndirectPredictor::recordTarget	(	InstSeqNum	seq_num,
		unsigned	ghr,
		const TheISA::PCState &	target,
		ThreadID	tid
	)

Definition at line 126 of file indirect.cc.

References DPRINTF, getSetIndex(), getTag(), numSets, numWays, IndirectPredictor::ThreadInfo::pathHist, targetCache, and threadInfo.

Referenced by BPredUnit::squash().

void IndirectPredictor::squash	(	InstSeqNum	seq_num,
		ThreadID	tid
	)

Definition at line 106 of file indirect.cc.

References DPRINTF, IndirectPredictor::ThreadInfo::pathHist, and threadInfo.

Referenced by BPredUnit::squash().

Member Data Documentation

const bool IndirectPredictor::hashGHR

private

Definition at line 57 of file indirect.hh.

Referenced by getSetIndex().

const bool IndirectPredictor::hashTargets

private

Definition at line 58 of file indirect.hh.

Referenced by getSetIndex().

const unsigned IndirectPredictor::instShift

private

Definition at line 63 of file indirect.hh.

Referenced by getSetIndex(), and getTag().

const unsigned IndirectPredictor::numSets

private

Definition at line 59 of file indirect.hh.

Referenced by getSetIndex(), IndirectPredictor(), lookup(), and recordTarget().

const unsigned IndirectPredictor::numWays

private

Definition at line 60 of file indirect.hh.

Referenced by IndirectPredictor(), and recordTarget().

const unsigned IndirectPredictor::pathLength

private

Definition at line 62 of file indirect.hh.

Referenced by commit(), and getSetIndex().

const unsigned IndirectPredictor::tagBits

private

Definition at line 61 of file indirect.hh.

Referenced by getTag().

std::vector<std::vector<IPredEntry> > IndirectPredictor::targetCache

private

Definition at line 72 of file indirect.hh.

Referenced by IndirectPredictor(), lookup(), and recordTarget().

std::vector<ThreadInfo> IndirectPredictor::threadInfo

private

Definition at line 94 of file indirect.hh.

Referenced by commit(), getSetIndex(), IndirectPredictor(), recordIndirect(), recordTarget(), and squash().

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

• cpu/pred/indirect.hh
• cpu/pred/indirect.cc