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#ifndef IF_H
#define IF_H
#include "accessor.h"
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
class IF : public Stage
{
public:
/**
* Constructor.
* @param The next stage in the pipeline.
* @return A newly allocated IF object.
*/
IF(Stage *next);
InstrDTO *advance(Response p) override;
private:
/**
* Performs a fetch only if a current fetch is not pending. Pending means
* that a fetch has completed successfully, but the caller stage in the
* pipeline is not ready to receive it. In this case, `curr_instr` is not
* the nullptr.
* @return STALLED if we are waiting on the storage devices, OK otherwise.
*/
void advance_helper();
};
#endif /* IF_H_INCLUDED */
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