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#ifndef ID_H
#define ID_H
#include "instr.h"
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
class ID : public Stage
{
public:
/**
* Constructor.
* @param The next stage in the pipeline.
* @return A newly allocated ID object.
*/
ID(Stage *next);
Response advance(InstrDTO &i) override;
/**
* Parse an instruction into a type, opcode, and fields. If the type is
* invalid, only the type field will be set.
*
* This method is marked public so it may be tested, and is not used outside
* of this class during normal execution.
*
* @param the resulting first field, which varies per type. To call this
* function properly, this field must contain the full instruction bytes on
* function entry.
* @param the resulting second field, which varies per type.
* @param the resulting third field, which varies per type.
* @param the resulting mnemonic.
*/
void get_instr_fields(
signed int &s1, signed int &s2, signed int &s3, Mnemonic &m);
private:
/**
* Helper for `get_instr_fields`.
* Given a raw instruction, returns the mnemonic and type.
* This operation will destroy the original arguments.
* @param the raw bits to parse.
* @param the resulting mnemonic.
* @param the resulting type.
*/
void split_instr(signed int &raw, unsigned int &type, Mnemonic &m);
/**
* Facilitates checking out a register by dereferencing the register
specified by the first parameter. Registers that are checked out cannot be
checked out until they are checked in.
* @param
* @return the contents of the register.
*/
Response dereference_register(signed int &);
};
#endif /* ID_D_INCLUDED */
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