BFSchedulePreLoopShared Class Reference

#include <BFSchedulePreLoopShared.hh>

Inheritance diagram for BFSchedulePreLoopShared:

Collaboration diagram for BFSchedulePreLoopShared:

Public Member Functions
	BFSchedulePreLoopShared (BF2Scheduler &sched, MoveNode &originalMN)
bool	operator() ()
void	undoOnlyMe ()
Public Member Functions inherited from BFOptimization
	BFOptimization (BF2Scheduler &sched)
virtual bool	isFinishFront ()
virtual void	mightBeReady (MoveNode &mn)
Public Member Functions inherited from Reversible
virtual void	undo ()
virtual	~Reversible ()
void	deleteChildren (std::stack< Reversible * > &children)
int	id ()
	Reversible ()

Private Attributes
MoveNode &	originalMN_
MoveNode *	prologMN_

Additional Inherited Members
Static Public Member Functions inherited from BFOptimization
static void	clearPrologMoves ()
static MoveNode *	getSisterTrigger (const MoveNode &mn, const TTAMachine::Machine &mach)
Protected Member Functions inherited from BFOptimization
DataDependenceGraph &	ddg ()
DataDependenceGraph *	rootDDG ()
const DataDependenceGraph &	ddg () const
DataDependenceGraph *	prologDDG ()
SimpleResourceManager &	rm () const
SimpleResourceManager *	prologRM () const
BUMoveNodeSelector &	selector ()
const TTAMachine::Machine &	targetMachine () const
unsigned int	ii () const
MoveNodeDuplicator &	duplicator () const
virtual bool	assign (int cycle, MoveNode &, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU_=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGuardWriteCycle=false)
virtual void	unassign (MoveNode &mn, bool disposePrologCopy=true)
virtual int	rmEC (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)
virtual int	rmLC (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)
virtual bool	canAssign (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGWN=false)
bool	putAlsoToPrologEpilog (int cycle, MoveNode &mn)
void	setPrologSrcFUAnno (MoveNode &prologMN, MoveNode &loopMN)
void	setPrologDstFUAnno (MoveNode &prologMN, MoveNode &loopMN)
void	setJumpGuard (MoveNode &mn)
void	unsetJumpGuard (MoveNode &mn)
bool	needJumpGuard (const MoveNode &mn, int cycle)
int	jumpGuardAvailableCycle (const MoveNode &mn)
bool	canBeSpeculated (const Operation &op)
bool	canBeSpeculated (const MoveNode &mn)
bool	usePrologMove (const MoveNode &mn)
bool	canBeScheduled (const MoveNode &mn)
const TTAMachine::RegisterFile *	RFReadPortCountPreventsScheduling (const MoveNode &mn)
bool	immCountPreventsScheduling (const MoveNode &mn)
Protected Member Functions inherited from Reversible
bool	runPreChild (Reversible *preChild)
bool	runPostChild (Reversible *preChild)
bool	runChild (std::stack< Reversible * > &children, Reversible *child)
bool	runChild (Reversible *child, bool pre)
void	undoAndRemovePreChildren ()
void	undoAndRemovePostChildren ()
void	undoAndRemoveChildren (std::stack< Reversible * > &children)
Protected Attributes inherited from BFOptimization
BF2Scheduler &	sched_
Protected Attributes inherited from Reversible
std::stack< Reversible * >	preChildren_
std::stack< Reversible * >	postChildren_
Static Protected Attributes inherited from BFOptimization
static std::map< MoveNode *, MoveNode *, MoveNode::Comparator >	prologMoves_

Detailed Description

Definition at line 38 of file BFSchedulePreLoopShared.hh.

Constructor & Destructor Documentation

BFSchedulePreLoopShared()

BFSchedulePreLoopShared::BFSchedulePreLoopShared ( BF2Scheduler &  sched, MoveNode &  originalMN  )

inline

Definition at line 40 of file BFSchedulePreLoopShared.hh.

                                                                       :
        BFOptimization(sched), originalMN_(originalMN) {}

Member Function Documentation

operator()()

bool BFSchedulePreLoopShared::operator() ( )

virtual

This performs the operation. Returns true if success, false if fail.

Implements Reversible.

Definition at line 43 of file BFSchedulePreLoopShared.cc.

                                         {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\tScheduling pre-loop-shared operand: "
              << originalMN_.toString()
              << std::endl;
#endif
    auto a = duplicator().duplicateMoveNode(originalMN_, true, true);
    prologMN_ = a.first;
 
    // These should always be unconditional. Operand moves have
    // no side effects, and nobody else uses the FU,
    // and the value of the guard might change between the iterations
    if (!prologMN_->move().isUnconditional()) {
        prologMN_->move().setGuard(NULL);
    }
    if (prologMN_ == NULL) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "\t\tMissing prolog MN for the move. " << std::endl;
#endif
        return false;
    }
    int ddgLC = prologDDG()->latestCycle(*prologMN_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\tddg lc: " << ddgLC << std::endl;
#endif
    if (ddgLC < 0) {
        duplicator().disposeMoveNode(prologMN_);
        return false;
    }
    int lastCycleOfProlog = rm().initiationInterval()-1+
        BF2Scheduler::PROLOG_CYCLE_BIAS;
    int rmlc = prologRM()->latestCycle(
        std::min(ddgLC, lastCycleOfProlog), *prologMN_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\trmlc: " << rmlc << std::endl;
#endif
    if (rmlc < 0) {
        duplicator().disposeMoveNode(prologMN_);
        return false;
    }
    prologRM()->assign(rmlc, *prologMN_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "scheduling of pre-loop opshare ok!"
              << prologMN_->toString() << std::endl;
#endif
    return true;
}

References SimpleResourceManager::assign(), MoveNodeDuplicator::disposeMoveNode(), MoveNodeDuplicator::duplicateMoveNode(), BFOptimization::duplicator(), SimpleResourceManager::initiationInterval(), TTAProgram::Move::isUnconditional(), DataDependenceGraph::latestCycle(), SimpleResourceManager::latestCycle(), MoveNode::move(), originalMN_, BF2Scheduler::PROLOG_CYCLE_BIAS, BFOptimization::prologDDG(), prologMN_, BFOptimization::prologRM(), BFOptimization::rm(), TTAProgram::Move::setGuard(), and MoveNode::toString().

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undoOnlyMe()

void BFSchedulePreLoopShared::undoOnlyMe ( )

virtual

Undoes the operations done by this class but not children. This method should be overloaded by most derived classes.

Reimplemented from Reversible.

Definition at line 91 of file BFSchedulePreLoopShared.cc.

                                         {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "undoing scheudle of pre-loop opschare: "
              << prologMN_->toString() << std::endl;
#endif
    prologRM()->unassign(*prologMN_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "unassigned scheudle of pre-loop opschare: "
              << prologMN_->toString() << std::endl;
#endif
 
    duplicator().disposeMoveNode(prologMN_);
}

References MoveNodeDuplicator::disposeMoveNode(), BFOptimization::duplicator(), prologMN_, BFOptimization::prologRM(), MoveNode::toString(), and SimpleResourceManager::unassign().

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Member Data Documentation

originalMN_

MoveNode& BFSchedulePreLoopShared::originalMN_

private

Definition at line 45 of file BFSchedulePreLoopShared.hh.

Referenced by operator()().

prologMN_

MoveNode* BFSchedulePreLoopShared::prologMN_

private

Definition at line 46 of file BFSchedulePreLoopShared.hh.

Referenced by operator()(), and undoOnlyMe().

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

• BFSchedulePreLoopShared.hh
• BFSchedulePreLoopShared.cc