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types.hpp: replace custom std::bit_cast

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Remove memcpy version.
Use builtin instead.
This commit is contained in:
Nekotekina 2021-05-22 14:26:20 +03:00
parent 309759b725
commit 2768727e2f
1 changed files with 4 additions and 19 deletions
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23
rpcs3/util/types.hpp
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@ -9,18 +9,12 @@
#include <array>
#include <tuple>
#include <compare>
#include <bit>
using std::chrono::steady_clock;
using namespace std::literals;
#ifdef _MSC_VER
#if !defined(__cpp_lib_bitops) && _MSC_VER < 1928
#define __cpp_lib_bitops
#endif
#endif
#include <bit>
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
@ -57,19 +51,10 @@ using namespace std::literals;
#if __cpp_lib_bit_cast < 201806L
namespace std
{
template <class To, class From, typename = std::enable_if_t<sizeof(To) == sizeof(From)>>
constexpr To bit_cast(const From& from) noexcept
template <typename To, typename From>
[[nodiscard]] constexpr To bit_cast(const From& from) noexcept
{
static_assert(sizeof(To) == sizeof(From), "std::bit_cast<>: incompatible type size");
if constexpr ((std::is_same_v<std::remove_const_t<To>, std::remove_const_t<From>> && std::is_constructible_v<To, From>) || (std::is_integral_v<From> && std::is_integral_v<To>))
{
return static_cast<To>(from);
}
To result{};
__builtin_memcpy(&result, &from, sizeof(From));
return result;
return __builtin_bit_cast(To, from);
}
}
#endif