BFUnscheduleMove.cc

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/*
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/**
 * @file BFUnscheduleMove.cc
 *
 * Definition of BFUnscheduleMove class
 *
 * Unschedules a move.
 *
 * @author Heikki Kultala 2014-2020(heikki.kultala-no.spam-tuni.fi)
 * @note rating: red
 */
 
#include "BFUnscheduleMove.hh"
#include "Move.hh"
#include "DataDependenceGraph.hh"
#include "Bus.hh"
#include "POMDisassembler.hh"
#include "SimpleResourceManager.hh"
#include "Instruction.hh"
#include "MoveNodeDuplicator.hh"
#include "Terminal.hh"
#include "BF2Scheduler.hh"
 
void BFUnscheduleMove::unscheduleOriginal() {
    oldCycle_ = mn_.cycle();
    oldBus_ = &mn_.move().bus();
 
    if (mn_.isSourceOperation()) {
        srcFU_ = &mn_.move().source().functionUnit();
    }
 
    if (mn_.isDestinationOperation()) {
        dstFU_ = &mn_.move().destination().functionUnit();
    }
 
    if (mn_.move().source().isImmediateRegister()) {
        oldImmWriteCycle_ = rm().immediateWriteCycle(mn_);
        immRegIndex_ = mn_.move().source().index();
        immu_ = &mn_.move().source().immediateUnit();
    }
 
    MoveNode* prologMN = ii() ?  duplicator().getMoveNode(mn_) : NULL;
    if (prologMN != NULL) {
        prologBus_ = &prologMN->move().bus();
 
        if (prologMN->move().source().isImmediateRegister()) {
            prologImmWriteCycle_ = prologRM()->immediateWriteCycle(*prologMN);
        }
 
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "\t\t\t\tProlog move: " << prologMN->toString() << std::endl;
        std::cerr << "\t\t\t\tBFUnscheduleMove Saving prolog bus: " << prologBus_->name() << " cycle: " << oldCycle_ << std::endl;
#endif
    }
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    for (int i = 0; i < recurseCounter_*2; i++)
        std::cerr << "\t";
        
    std::cerr << "\t\tUnscheduling original: " << mn_.toString() << " bus: " << oldBus_->name() << std::endl;
#endif
    unassign(mn_, false);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    if (!canAssign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_, prologBus_,
                   oldImmWriteCycle_, prologImmWriteCycle_)) {
        for (int i = 0; i < recurseCounter_*2; i++)
            std::cerr << "\t";
 
        std::cerr << "\t\tCannot assign to old cycle: " << mn_.toString()
                  << " old cycle: " << oldCycle_ << std::endl;
        ddg().writeToDotFile("cannot_assign_old_cycle.dot");
        if (mn_.isSourceOperation()) {
            std::cerr << "\t\twhole src PO: " << mn_.sourceOperation().toString()
                      << std::endl;
        }
        if (mn_.isDestinationOperation()) {
            std::cerr << "\t\twhole dst PO: " << mn_.destinationOperation().toString()
                      << std::endl;
        }
        assert(false);
    }
#endif
}
 
void BFUnscheduleMove::returnOriginal() {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    for (int i = 0; i < recurseCounter_*2; i++)
        std::cerr << "\t";
 
    std::cerr << "\t\treturning original: " << mn_.toString() << " current bus: "
              << mn_.move().bus().name() << " old bus: " << oldBus_->name()
              << " cycle: " << oldCycle_ << std::endl;
#endif
 
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    if (!canAssign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_, prologBus_,
                   oldImmWriteCycle_, prologImmWriteCycle_, immu_,
                   immRegIndex_, true)) {
        std::cerr << "Cannot return to old cycle: " << mn_.toString() << " cycle: " << oldCycle_  << std::endl;
        if (mn_.isDestinationOperation()) {
            std::cerr << "dstPO: " << mn_.destinationOperation().toString() << std::endl;
        }
        if (mn_.isSourceOperation()) {
            std::cerr << "srcPO: " << mn_.sourceOperation().toString() << std::endl;
        }
        std::cerr << "Original bus: " << oldBus_->name() << std::endl;
        ddg().writeToDotFile("cannot_return_old_cycle.dot");
        TTAProgram::Instruction* ins = rm().instruction(oldCycle_);
        for (int i = 0; i < ins->moveCount(); i++) {
            std::cerr << "\t" << POMDisassembler::disassemble(ins->move(i))
                      << " bus: " << ins->move(i).bus().name()
                      << std::endl;
        }
        std::cerr << "ins contains " << ins->immediateCount() << " immediates." << std::endl;
        assert(false);
    }
#endif
    assign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_, prologBus_,
       oldImmWriteCycle_, prologImmWriteCycle_, immu_, immRegIndex_);
}
 
void BFUnscheduleMove::undoOnlyMe() {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "BFUnscheudleMove undo" << std::endl;
#endif
    returnOriginal();
}
 
bool
BFUnscheduleMove::operator()() {
    unscheduleOriginal();
    return true;
}
 
int BFUnscheduleMove::recurseCounter_ = 0;