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#ifndef REGISTERS_H
#define REGISTERS_H
#include <QObject>
#include <cstdint>
namespace machine {
class Registers : public QObject {
Q_OBJECT
public:
Registers();
Registers(const Registers&);
std::uint32_t read_pc() const; // Return current value of program counter
std::uint32_t pc_inc(); // Increment program counter by four bytes
std::uint32_t pc_jmp(std::int32_t offset); // Relative jump from current location in program counter
void pc_abs_jmp(std::uint32_t address); // Absolute jump in program counter (write to pc)
void pc_abs_jmp_28(std::uint32_t address); // Absolute jump in current 256MB section (basically J implementation)
std::uint32_t read_gp(std::uint8_t i) const; // Read general-purpose register
void write_gp(std::uint8_t i, std::uint32_t value); // Write general-purpose register
std::uint32_t read_hi_lo(bool hi) const; // true - read HI / false - read LO
void write_hi_lo(bool hi, std::uint32_t value);
bool operator ==(const Registers &c) const;
bool operator !=(const Registers &c) const;
void reset(); // Reset all values to zero (except pc)
signals:
void pc_update(std::uint32_t val);
void gp_update(std::uint8_t i, std::uint32_t val);
void hi_lo_update(bool hi, std::uint32_t val);
private:
std::uint32_t gp[31]; // general-purpose registers ($0 is intentionally skipped)
std::uint32_t hi, lo;
std::uint32_t pc; // program counter
};
}
Q_DECLARE_METATYPE(machine::Registers)
#endif // REGISTERS_H
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