Files
RISC-V-Simulator/include/register.h
2024-07-11 21:53:52 +08:00

49 lines
1.2 KiB
C++

#pragma once
#include "debug.h"
#include "concept.h"
namespace dark {
template <std::size_t _Len>
struct Register {
private:
static_assert(0 < _Len && _Len <= kMaxLength,
"Register: _Len must be in range [1, kMaxLength].");
friend class Visitor;
max_size_t _M_old : _Len;
max_size_t _M_new : _Len;
[[no_unique_address]]
debug::DebugValue <bool, false> _M_assigned;
void sync() {
if (this->_M_assigned) {
this->_M_assigned = false;
this->_M_old = this->_M_new;
}
}
public:
static constexpr bool _Bit_Len = _Len;
explicit Register() : _M_old(), _M_new(), _M_assigned() {}
Register(Register &&) = delete;
Register(const Register &) = delete;
Register &operator=(Register &&) = delete;
Register &operator=(const Register &rhs) = delete;
template <concepts::bit_convertible <_Len> _Tp>
void operator <= (_Tp &&value) {
debug::assert(!this->_M_assigned, "Register is double assigned in this cycle.");
this->_M_assigned = true;
this->_M_new = static_cast <max_size_t> (value);
}
explicit operator max_size_t() const { return this->_M_old; }
};
} // namespace dark