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#ifndef EX_H
#define EX_H
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
#include <exception>
#include <unordered_map>
class HaltException : public std::exception
{
const char *what() const noexcept override {
return "";
}
};
class EX : public Stage
{
public:
/**
* Constructor.
* @param The next stage in the pipeline.
* @return A newly allocated EX object.
*/
EX(Stage *next);
using Stage::advance;
private:
void advance_helper();
/**
* Wrapper for division functions, which detects HALT instructinos (division
* by 0).
* @param the numerator
* @param the denominator
* @param if the modulo operator should instead be used
*/
void handle_divide(signed int &s1, signed int s2, bool is_mod);
/**
* Maps each mnemonic to a function which carries out the instruction's base
* logic.
* All instructions store the result into s1.
*/
std::unordered_map<
Mnemonic,
std::function<void(
signed int &s1, signed int s2, signed int s3, unsigned int pc)>>
instr_map;
};
#endif /* EX_H_INCLUDED */
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