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Tidy endianness support (se_t) implementation

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Move se_t and se_storage to util/endian.hpp
Use single template instead of two specializations.
Add minor optimization for MSVC.
Remove v128 dependency.
Try to enable intrinsics for unaligned data.
Fix minor bug in u16/u32/u64 specializations.
This commit is contained in:
Nekotekina 2019-09-26 21:57:03 +03:00
parent c7c12941bc
commit bd1a24b894
8 changed files with 308 additions and 344 deletions
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331
Utilities/BEType.h
View File

@ -1,6 +1,7 @@
#pragma once
#include "types.h"
#include "util/endian.hpp"
#include <cstring>
// 128-bit vector type and also se_storage<> storage type
@ -332,339 +333,13 @@ inline v128 operator~(const v128& other)
return v128::from64(~other._u64[0], ~other._u64[1]);
}
template <typename T, std::size_t Align, std::size_t Size>
struct se_storage
{
struct type
{
alignas(Align) std::byte data[Size];
};
// Unoptimized generic byteswap for unaligned data
static void reverse(u8* dst, const u8* src)
{
for (std::size_t i = 0; i < Size; i++)
{
dst[i] = src[Size - 1 - i];
}
}
static type to(const T& src)
{
type result;
reverse(reinterpret_cast<u8*>(&result), reinterpret_cast<const u8*>(&src));
return result;
}
static T from(const type& src)
{
T result;
reverse(reinterpret_cast<u8*>(&result), reinterpret_cast<const u8*>(&src));
return result;
}
};
template <typename T>
struct se_storage<T, 2, 2>
{
using type = u16;
static constexpr u16 swap(u16 src)
{
#if defined(__GNUG__)
return __builtin_bswap16(src);
#else
return _byteswap_ushort(src);
#endif
}
static inline u16 to(const T& src)
{
return swap(std::bit_cast<u16>(src));
}
static inline T from(u16 src)
{
return std::bit_cast<T, u16>(swap(src));
}
};
template <typename T>
struct se_storage<T, 4, 4>
{
using type = u32;
static constexpr u32 swap(u32 src)
{
#if defined(__GNUG__)
return __builtin_bswap32(src);
#else
return _byteswap_ulong(src);
#endif
}
static inline u32 to(const T& src)
{
return swap(std::bit_cast<u32>(src));
}
static inline T from(u32 src)
{
return std::bit_cast<T, u32>(swap(src));
}
};
template <typename T>
struct se_storage<T, 8, 8>
{
using type = u64;
static constexpr u64 swap(u64 src)
{
#if defined(__GNUG__)
return __builtin_bswap64(src);
#else
return _byteswap_uint64(src);
#endif
}
static inline u64 to(const T& src)
{
return swap(std::bit_cast<u64>(src));
}
static inline T from(u64 src)
{
return std::bit_cast<T, u64>(swap(src));
}
};
template <typename T>
struct se_storage<T, 16, 16>
{
using type = v128;
static inline v128 swap(const v128& src)
{
return v128::from64(se_storage<u64>::swap(src._u64[1]), se_storage<u64>::swap(src._u64[0]));
}
static inline v128 to(const T& src)
{
return swap(std::bit_cast<v128>(src));
}
static inline T from(const v128& src)
{
return std::bit_cast<T, v128>(swap(src));
}
};
// Switched endianness
template <typename T, std::size_t Align>
class se_t<T, true, Align>
{
using type = typename std::remove_cv<T>::type;
using stype = typename se_storage<type, Align>::type;
using storage = se_storage<type, Align>;
stype m_data;
static_assert(!std::is_pointer<type>::value, "se_t<> error: invalid type (pointer)");
static_assert(!std::is_reference<type>::value, "se_t<> error: invalid type (reference)");
static_assert(!std::is_array<type>::value, "se_t<> error: invalid type (array)");
static_assert(sizeof(type) == alignof(type), "se_t<> error: unexpected alignment");
public:
se_t() = default;
se_t(const se_t& right) = default;
se_t(type value)
: m_data(storage::to(value))
{
}
type value() const
{
return storage::from(m_data);
}
stype& raw()
{
return m_data;
}
se_t& operator=(const se_t&) = default;
se_t& operator=(type value)
{
return m_data = storage::to(value), *this;
}
using simple_type = simple_t<T>;
operator type() const
{
return storage::from(m_data);
}
};
// Native endianness
template <typename T, std::size_t Align>
class se_t<T, false, Align>
{
using type = typename std::remove_cv<T>::type;
using stype = typename se_storage<type, Align>::type;
using storage = se_storage<type, Align>;
static_assert(!std::is_pointer<type>::value, "se_t<> error: invalid type (pointer)");
static_assert(!std::is_reference<type>::value, "se_t<> error: invalid type (reference)");
static_assert(!std::is_array<type>::value, "se_t<> error: invalid type (array)");
static_assert(sizeof(type) == alignof(type), "se_t<> error: unexpected alignment");
stype m_data;
public:
se_t() = default;
se_t(type value)
: m_data(std::bit_cast<stype>(value))
{
}
type value() const
{
return std::bit_cast<type>(m_data);
}
stype& raw()
{
return m_data;
}
se_t& operator=(const se_t& value) = default;
se_t& operator=(type value)
{
m_data = std::bit_cast<stype>(value);
return *this;
}
using simple_type = simple_t<T>;
operator type() const
{
return value();
}
};
using stx::se_t;
using stx::se_storage;
// se_t<> with native endianness
template <typename T, std::size_t Align = alignof(T)>
using nse_t = se_t<T, false, Align>;
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator+=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value += right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator-=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value -= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator*=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value *= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator/=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value /= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator%=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value %= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator&=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value &= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator|=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value |= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator^=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value ^= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator<<=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value <<= right);
}
template <typename T, bool Se, std::size_t Align, typename T1>
inline se_t<T, Se, Align>& operator>>=(se_t<T, Se, Align>& left, const T1& right)
{
auto value = left.value();
return left = (value >>= right);
}
template <typename T, bool Se, std::size_t Align>
inline se_t<T, Se, Align> operator++(se_t<T, Se, Align>& left, int)
{
auto value = left.value();
auto result = value++;
left = value;
return result;
}
template <typename T, bool Se, std::size_t Align>
inline se_t<T, Se, Align> operator--(se_t<T, Se, Align>& left, int)
{
auto value = left.value();
auto result = value--;
left = value;
return result;
}
template <typename T, bool Se, std::size_t Align>
inline se_t<T, Se, Align>& operator++(se_t<T, Se, Align>& right)
{
auto value = right.value();
return right = ++value;
}
template <typename T, bool Se, std::size_t Align>
inline se_t<T, Se, Align>& operator--(se_t<T, Se, Align>& right)
{
auto value = right.value();
return right = --value;
}
#if IS_LE_MACHINE == 1
template <typename T, std::size_t Align = alignof(T)>
using be_t = se_t<T, true, Align>;

6
Utilities/types.h
View File

@ -191,12 +191,6 @@ namespace fmt
const fmt_type_info* get_type_info();
}
template <typename T, std::size_t Align = alignof(T), std::size_t Size = sizeof(T)>
struct se_storage;
template <typename T, bool Se = true, std::size_t Align = alignof(T)>
class se_t;
template <typename T>
class atomic_t;

2
rpcs3/Emu/Cell/Modules/cellSaveData.cpp
View File

@ -335,7 +335,7 @@ static s32 savedata_check_args(u32 operation, u32 version, vm::cptr<char> dirNam
for (auto resv : setBuf->reserved)
{
if (resv.raw() != 0)
if (resv)
{
// ****** sysutil savedata parameter error : 10 ******
return 10;

2
rpcs3/Emu/RSX/CgBinaryFragmentProgram.cpp
View File

@ -229,7 +229,7 @@ void CgBinaryDisasm::TaskFP()
for (u32 i = 0; i < (m_buffer_size - m_offset) / sizeof(u32); i++)
{
// Get BE data
data[i] = be_t<u32>{data[i]}.raw();
data[i] = std::bit_cast<u32, be_t<u32>>(data[i]);
}
enum

2
rpcs3/Emu/RSX/CgBinaryProgram.h
View File

@ -375,7 +375,7 @@ public:
verify(HERE), (m_buffer_size - m_offset) % sizeof(u32) == 0;
for (u32 i = 0; i < (m_buffer_size - m_offset) / sizeof(u32); i++)
{
vdata[i] = be_t<u32>{vdata[i]}.raw();
vdata[i] = std::bit_cast<u32, be_t<u32>>(vdata[i]);
}
for (u32 i = 0; i < prog.ucodeSize / sizeof(u32); i++)

2
rpcs3/Emu/RSX/RSXThread.cpp
View File

@ -336,7 +336,7 @@ namespace rsx
{
//Endianness is swapped because common upload code expects input in BE
//TODO: Implement fast upload path for LE inputs and do away with this
element_push_buffer.push_back(be_t<u32>{index}.raw());
element_push_buffer.push_back(std::bit_cast<u32, be_t<u32>>(index));
}
u32 thread::get_push_buffer_index_count() const

10
rpcs3/Emu/RSX/rsx_methods.cpp
View File

@ -65,9 +65,7 @@ namespace rsx
rsx->sync_point_request = true;
const u32 addr = get_address(method_registers.semaphore_offset_406e(), method_registers.semaphore_context_dma_406e());
// Get raw BE value
arg = be_t<u32>{arg}.raw();
const auto& sema = vm::_ref<atomic_t<nse_t<u32>>>(addr);
const auto& sema = vm::_ref<atomic_t<be_t<u32>>>(addr);
// TODO: Remove vblank semaphore hack
if (sema.load() == arg || addr == rsx->ctxt_addr + 0x30) return;
@ -247,7 +245,7 @@ namespace rsx
case rsx::vertex_base_type::ub:
case rsx::vertex_base_type::ub256:
// Get BE data
arg = be_t<u32>{arg}.raw();
arg = std::bit_cast<u32, be_t<u32>>(arg);
break;
default:
break;
@ -1301,7 +1299,7 @@ namespace rsx
else
{
std::vector<u8> temp(line_length * line_count);
u8* buf = temp.data();
u8* buf = temp.data();
for (u32 y = 0; y < line_count; ++y)
{
@ -1310,7 +1308,7 @@ namespace rsx
src += in_pitch;
}
buf = temp.data();
buf = temp.data();
for (u32 y = 0; y < line_count; ++y)
{

297
rpcs3/util/endian.hpp Normal file
View File

@ -0,0 +1,297 @@
#pragma once
#include <cstdint>
#include "Utilities/types.h"
namespace stx
{
template <typename T, std::size_t Align = alignof(T), std::size_t Size = sizeof(T)>
struct se_storage
{
struct type8
{
alignas(Align > alignof(T) ? alignof(T) : Align) unsigned char data[sizeof(T)];
};
struct type64
{
alignas(8) std::uint64_t data[sizeof(T) / 8];
};
using type = std::conditional_t<(Align >= 8 && sizeof(T) % 8 == 0), type64, type8>;
// Possibly unoptimized generic byteswap for unaligned data
static constexpr type swap(const type& src) noexcept;
};
template <typename T>
struct se_storage<T, alignof(std::uint16_t), 2>
{
using type = std::uint16_t;
static constexpr std::uint16_t swap(std::uint16_t src) noexcept
{
#if defined(__GNUG__)
return __builtin_bswap16(src);
#else
return _byteswap_ushort(src);
#endif
}
};
template <typename T>
struct se_storage<T, alignof(std::uint32_t), 4>
{
using type = std::uint32_t;
static constexpr std::uint32_t swap(std::uint32_t src) noexcept
{
#if defined(__GNUG__)
return __builtin_bswap32(src);
#else
return _byteswap_ulong(src);
#endif
}
};
template <typename T>
struct se_storage<T, alignof(std::uint64_t), 8>
{
using type = std::uint64_t;
static constexpr std::uint64_t swap(std::uint64_t src) noexcept
{
#if defined(__GNUG__)
return __builtin_bswap64(src);
#else
return _byteswap_uint64(src);
#endif
}
};
template <typename T, std::size_t Align, std::size_t Size>
constexpr typename se_storage<T, Align, Size>::type se_storage<T, Align, Size>::swap(const type& src) noexcept
{
// Try to keep u16/u32/u64 optimizations at the cost of more bitcasts
if constexpr (sizeof(T) == 1)
{
return src;
}
else if constexpr (sizeof(T) == 2)
{
return std::bit_cast<type>(se_storage<std::uint16_t>::swap(std::bit_cast<std::uint16_t>(src)));
}
else if constexpr (sizeof(T) == 4)
{
return std::bit_cast<type>(se_storage<std::uint32_t>::swap(std::bit_cast<std::uint32_t>(src)));
}
else if constexpr (sizeof(T) == 8)
{
return std::bit_cast<type>(se_storage<std::uint64_t>::swap(std::bit_cast<std::uint64_t>(src)));
}
else if constexpr (sizeof(T) % 8 == 0)
{
type64 tmp = std::bit_cast<type64>(src);
type64 dst{};
// Swap u64 blocks
for (std::size_t i = 0; i < sizeof(T) / 8; i++)
{
dst.data[i] = se_storage<std::uint64_t>::swap(tmp.data[sizeof(T) / 8 - 1 - i]);
}
return std::bit_cast<type>(dst);
}
else
{
type dst{};
// Swap by moving every byte
for (std::size_t i = 0; i < sizeof(T); i++)
{
dst.data[i] = src.data[sizeof(T) - 1 - i];
}
return dst;
}
}
// Endianness support template
template <typename T, bool Swap, std::size_t Align = alignof(T)>
class alignas(Align) se_t
{
using type = typename std::remove_cv<T>::type;
using stype = typename se_storage<type, Align>::type;
using storage = se_storage<type, Align>;
stype m_data;
static_assert(!std::is_pointer<type>::value, "se_t<> error: invalid type (pointer)");
static_assert(!std::is_reference<type>::value, "se_t<> error: invalid type (reference)");
static_assert(!std::is_array<type>::value, "se_t<> error: invalid type (array)");
static_assert(sizeof(type) == alignof(type), "se_t<> error: unexpected alignment");
static stype to_data(type value) noexcept
{
if constexpr (Swap)
{
return storage::swap(std::bit_cast<stype>(value));
}
else
{
return std::bit_cast<stype>(value);
}
}
public:
se_t() = default;
se_t(const se_t& right) = default;
se_t(type value) noexcept
: m_data(to_data(value))
{
}
type value() const noexcept
{
if constexpr (Swap)
{
return std::bit_cast<type>(storage::swap(m_data));
}
else
{
return std::bit_cast<type>(m_data);
}
}
type get() const noexcept
{
return value();
}
se_t& operator=(const se_t&) = default;
se_t& operator=(type value) noexcept
{
m_data = to_data(value);
return *this;
}
using simple_type = simple_t<T>;
operator type() const noexcept
{
return value();
}
#ifdef _MSC_VER
explicit operator bool() const noexcept
{
static_assert(!type{});
static_assert(!std::is_floating_point_v<type>);
return !!std::bit_cast<type>(m_data);
}
#endif
template <typename T1>
se_t& operator+=(const T1& rhs)
{
*this = value() + rhs;
return *this;
}
template <typename T1>
se_t& operator-=(const T1& rhs)
{
*this = value() - rhs;
return *this;
}
template <typename T1>
se_t& operator*=(const T1& rhs)
{
*this = value() * rhs;
return *this;
}
template <typename T1>
se_t& operator/=(const T1& rhs)
{
*this = value() / rhs;
return *this;
}
template <typename T1>
se_t& operator%=(const T1& rhs)
{
*this = value() % rhs;
return *this;
}
template <typename T1>
se_t& operator&=(const T1& rhs)
{
*this = value() & rhs;
return *this;
}
template <typename T1>
se_t& operator|=(const T1& rhs)
{
*this = value() | rhs;
return *this;
}
template <typename T1>
se_t& operator^=(const T1& rhs)
{
*this = value() ^ rhs;
return *this;
}
template <typename T1>
se_t& operator<<=(const T1& rhs)
{
*this = value() << rhs;
return *this;
}
template <typename T1>
se_t& operator>>=(const T1& rhs)
{
*this = value() >> rhs;
return *this;
}
se_t& operator++()
{
T value = *this;
*this = ++value;
return *this;
}
se_t& operator--()
{
T value = *this;
*this = --value;
return *this;
}
T operator++(int)
{
T value = *this;
T result = value++;
*this = value;
return result;
}
T operator--(int)
{
T value = *this;
T result = value--;
*this = value;
return result;
}
};
}