ExecutableInstruction.icc

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/**
 * @file ExecutableInstruction.icc
 *
 * Inline method definitions of ExecutableInstruction class.
 *
 * @author Pekka Jääskeläinen 2005 (pjaaskel-no.spam-cs.tut.fi)
 * @note rating: red
 */
 
#include "ExecutableInstruction.hh"
#include "ExecutableMove.hh"
#include "LongImmUpdateAction.hh"
#include "SequenceTools.hh"
 
/**
 * Executes the instruction.
 *
 * First all long immediate update actions are executed. 
 * Next, guards are evaluated to decide which moves will be squashed and
 * which not. Finally, data transports of the unsquashed moves are 
 * executed.
 */
inline void
ExecutableInstruction::execute() {
 
    for (std::size_t i = 0; i < updateActions_.size(); ++i) {
        updateActions_[i]->execute();
    }
    // have to evaluate the guards before either a long immediate
    // or a register transport overwrites it
    for (std::size_t i = 0; i < moves_.size(); ++i) {
        moves_[i]->evaluateGuard();
    }
    for (std::size_t i = 0; i < moves_.size(); ++i) {
        moves_[i]->executeRead();
    }
    for (std::size_t i = 0; i < moves_.size(); ++i) {
        moves_[i]->executeWrite();
    }
    executionCount_++;
}
 
/**
 * Returns true in case the move with the given index was squashed the last 
 * time the instruction was executed.
 *
 * Being squashed means that the move is guarded and the guard expression
 * evaluated to false.
 *
 * @param moveIndex Index of the move to query.
 * @return True in case move was squashed.
 */
inline bool 
ExecutableInstruction::moveSquashed(std::size_t moveIndex) const {
    return moves_[moveIndex]->squashed();
}
 
/**
 * Returns true in case this instruction is considered a program
 * exit point: the simulation should stop *after* executing this instruction.
 */
inline bool
ExecutableInstruction::isExitPoint() const {
    return exitPoint_;
}
 
/**
 * Sets the instruction's exit point status.
 *
 * @see isExitPoint()
 */
inline void
ExecutableInstruction::setExitPoint(bool b) {
    exitPoint_ = b;
}