difftest.hpp

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#ifndef SEMU_DIFFTEST_HPP
#define SEMU_DIFFTEST_HPP
 
#include <string>
#include <cstdint>
#include <cstddef>
#include "sEMU/core.hpp"
#include "sEMU/mem.hpp"
 
// 差分测试的数据流方向
enum { DIFFTEST_TO_DUT = 0, DIFFTEST_TO_REF = 1 };

struct CPU_state {
    uint32_t gpr[32];   
    uint32_t pc;        
};

class DiffTest {
public:
    DiffTest();
    ~DiffTest();

    bool init(const std::string& ref_so_file, int port);

    void sync_memory(size_t addr, void* buf, size_t n, bool to_ref);

    void sync_registers(const Core* core, bool to_ref);

    void step(uint64_t n);

    bool check_registers(const CPU_state& dut_state);

    void skip_ref();

    bool is_active() const { return active; }
 
private:
    void* handle = nullptr;
    bool active = false;
 
    // API function pointers
    void (*ref_difftest_memcpy)(uint32_t addr, void* buf, size_t n, bool direction) = nullptr;
    void (*ref_difftest_regcpy)(void* dut, bool direction) = nullptr;
    void (*ref_difftest_exec)(uint64_t n) = nullptr;
    void (*ref_difftest_raise_intr)(uint32_t NO) = nullptr;
    void (*ref_difftest_init)(int port) = nullptr;
    void (*ref_difftest_skip_ref)() = nullptr;
};
 
// Global instance, defined in main.cpp
extern DiffTest difftest;
 
#endif // SEMU_DIFFTEST_HPP