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#ifndef EX_H
#define EX_H
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
#include <unordered_map>
class EX : public Stage
{
public:
/**
* Constructor.
* @param The next stage in the pipeline.
* @return A newly allocated EX object.
*/
EX(Stage *next);
InstrDTO *advance(Response p) override;
private:
/**
* Sets the (over|under)flow condition code if adding `a` and `b` results in
* either.
* @param the first operand
* @param the second operand
*/
void overflow_guard(signed int a, signed int b);
/**
* Maps each mnemonic to a function which carries out the instruction's base
* logic.
*/
std::unordered_map<
Mnemonic,
std::function<void(signed int &s1, signed int &s2)>>
instr_map;
};
#endif /* EX_H_INCLUDED */
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