yuzu/src/common/swap.h

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// Copyright (c) 2012- PPSSPP Project / Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#pragma once
#if defined(_MSC_VER)
#include <cstdlib>
#elif defined(__linux__)
#include <byteswap.h>
#elif defined(__FreeBSD__)
#include <sys/endian.h>
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#endif
#include <cstring>
#include "common/common_types.h"
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// GCC 4.6+
#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// LLVM/clang
#elif __clang__
#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// MSVC
#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#endif
// Worst case, default to little endian.
#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
#define COMMON_LITTLE_ENDIAN 1
#endif
namespace Common {
#ifdef _MSC_VER
inline u16 swap16(u16 _data) {return _byteswap_ushort(_data);}
inline u32 swap32(u32 _data) {return _byteswap_ulong (_data);}
inline u64 swap64(u64 _data) {return _byteswap_uint64(_data);}
#elif _M_ARM
inline u16 swap16 (u16 _data) { u32 data = _data; __asm__ ("rev16 %0, %1\n" : "=l" (data) : "l" (data)); return (u16)data;}
inline u32 swap32 (u32 _data) {__asm__ ("rev %0, %1\n" : "=l" (_data) : "l" (_data)); return _data;}
inline u64 swap64(u64 _data) {return ((u64)swap32(_data) << 32) | swap32(_data >> 32);}
#elif __linux__
inline u16 swap16(u16 _data) {return bswap_16(_data);}
inline u32 swap32(u32 _data) {return bswap_32(_data);}
inline u64 swap64(u64 _data) {return bswap_64(_data);}
#elif __APPLE__
inline __attribute__((always_inline)) u16 swap16(u16 _data)
{return (_data >> 8) | (_data << 8);}
inline __attribute__((always_inline)) u32 swap32(u32 _data)
{return __builtin_bswap32(_data);}
inline __attribute__((always_inline)) u64 swap64(u64 _data)
{return __builtin_bswap64(_data);}
#elif __FreeBSD__
inline u16 swap16(u16 _data) {return bswap16(_data);}
inline u32 swap32(u32 _data) {return bswap32(_data);}
inline u64 swap64(u64 _data) {return bswap64(_data);}
#else
// Slow generic implementation.
inline u16 swap16(u16 data) {return (data >> 8) | (data << 8);}
inline u32 swap32(u32 data) {return (swap16(data) << 16) | swap16(data >> 16);}
inline u64 swap64(u64 data) {return ((u64)swap32(data) << 32) | swap32(data >> 32);}
#endif
inline float swapf(float f) {
static_assert(sizeof(u32) == sizeof(float),
"float must be the same size as uint32_t.");
u32 value;
std::memcpy(&value, &f, sizeof(u32));
value = swap32(value);
std::memcpy(&f, &value, sizeof(u32));
return f;
}
inline double swapd(double f) {
static_assert(sizeof(u64) == sizeof(double),
"double must be the same size as uint64_t.");
u64 value;
std::memcpy(&value, &f, sizeof(u64));
value = swap64(value);
std::memcpy(&f, &value, sizeof(u64));
return f;
}
} // Namespace Common
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template <typename T, typename F>
struct swap_struct_t {
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typedef swap_struct_t<T, F> swapped_t;
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protected:
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T value = T();
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static T swap(T v) {
return F::swap(v);
}
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public:
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T const swap() const {
return swap(value);
}
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swap_struct_t() = default;
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swap_struct_t(const T &v): value(swap(v)) {}
template <typename S>
swapped_t& operator=(const S &source) {
value = swap((T)source);
return *this;
}
operator s8() const { return (s8)swap(); }
operator u8() const { return (u8)swap(); }
operator s16() const { return (s16)swap(); }
operator u16() const { return (u16)swap(); }
operator s32() const { return (s32)swap(); }
operator u32() const { return (u32)swap(); }
operator s64() const { return (s64)swap(); }
operator u64() const { return (u64)swap(); }
operator float() const { return (float)swap(); }
operator double() const { return (double)swap(); }
// +v
swapped_t operator +() const {
return +swap();
}
// -v
swapped_t operator -() const {
return -swap();
}
// v / 5
swapped_t operator/(const swapped_t &i) const {
return swap() / i.swap();
}
template <typename S>
swapped_t operator/(const S &i) const {
return swap() / i;
}
// v * 5
swapped_t operator*(const swapped_t &i) const {
return swap() * i.swap();
}
template <typename S>
swapped_t operator*(const S &i) const {
return swap() * i;
}
// v + 5
swapped_t operator+(const swapped_t &i) const {
return swap() + i.swap();
}
template <typename S>
swapped_t operator+(const S &i) const {
return swap() + (T)i;
}
// v - 5
swapped_t operator-(const swapped_t &i) const {
return swap() - i.swap();
}
template <typename S>
swapped_t operator-(const S &i) const {
return swap() - (T)i;
}
// v += 5
swapped_t& operator+=(const swapped_t &i) {
value = swap(swap() + i.swap());
return *this;
}
template <typename S>
swapped_t& operator+=(const S &i) {
value = swap(swap() + (T)i);
return *this;
}
// v -= 5
swapped_t& operator-=(const swapped_t &i) {
value = swap(swap() - i.swap());
return *this;
}
template <typename S>
swapped_t& operator-=(const S &i) {
value = swap(swap() - (T)i);
return *this;
}
// ++v
swapped_t& operator++() {
value = swap(swap()+1);
return *this;
}
// --v
swapped_t& operator--() {
value = swap(swap()-1);
return *this;
}
// v++
swapped_t operator++(int) {
swapped_t old = *this;
value = swap(swap()+1);
return old;
}
// v--
swapped_t operator--(int) {
swapped_t old = *this;
value = swap(swap()-1);
return old;
}
// Comparaison
// v == i
bool operator==(const swapped_t &i) const {
return swap() == i.swap();
}
template <typename S>
bool operator==(const S &i) const {
return swap() == i;
}
// v != i
bool operator!=(const swapped_t &i) const {
return swap() != i.swap();
}
template <typename S>
bool operator!=(const S &i) const {
return swap() != i;
}
// v > i
bool operator>(const swapped_t &i) const {
return swap() > i.swap();
}
template <typename S>
bool operator>(const S &i) const {
return swap() > i;
}
// v < i
bool operator<(const swapped_t &i) const {
return swap() < i.swap();
}
template <typename S>
bool operator<(const S &i) const {
return swap() < i;
}
// v >= i
bool operator>=(const swapped_t &i) const {
return swap() >= i.swap();
}
template <typename S>
bool operator>=(const S &i) const {
return swap() >= i;
}
// v <= i
bool operator<=(const swapped_t &i) const {
return swap() <= i.swap();
}
template <typename S>
bool operator<=(const S &i) const {
return swap() <= i;
}
// logical
swapped_t operator !() const {
return !swap();
}
// bitmath
swapped_t operator ~() const {
return ~swap();
}
swapped_t operator &(const swapped_t &b) const {
return swap() & b.swap();
}
template <typename S>
swapped_t operator &(const S &b) const {
return swap() & b;
}
swapped_t& operator &=(const swapped_t &b) {
value = swap(swap() & b.swap());
return *this;
}
template <typename S>
swapped_t& operator &=(const S b) {
value = swap(swap() & b);
return *this;
}
swapped_t operator |(const swapped_t &b) const {
return swap() | b.swap();
}
template <typename S>
swapped_t operator |(const S &b) const {
return swap() | b;
}
swapped_t& operator |=(const swapped_t &b) {
value = swap(swap() | b.swap());
return *this;
}
template <typename S>
swapped_t& operator |=(const S &b) {
value = swap(swap() | b);
return *this;
}
swapped_t operator ^(const swapped_t &b) const {
return swap() ^ b.swap();
}
template <typename S>
swapped_t operator ^(const S &b) const {
return swap() ^ b;
}
swapped_t& operator ^=(const swapped_t &b) {
value = swap(swap() ^ b.swap());
return *this;
}
template <typename S>
swapped_t& operator ^=(const S &b) {
value = swap(swap() ^ b);
return *this;
}
template <typename S>
swapped_t operator <<(const S &b) const {
return swap() << b;
}
template <typename S>
swapped_t& operator <<=(const S &b) const {
value = swap(swap() << b);
return *this;
}
template <typename S>
swapped_t operator >>(const S &b) const {
return swap() >> b;
}
template <typename S>
swapped_t& operator >>=(const S &b) const {
value = swap(swap() >> b);
return *this;
}
// Member
/** todo **/
// Arithmetics
template <typename S, typename T2, typename F2>
friend S operator+(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator-(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator/(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator*(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator%(const S &p, const swapped_t v);
// Arithmetics + assignements
template <typename S, typename T2, typename F2>
friend S operator+=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator-=(const S &p, const swapped_t v);
// Bitmath
template <typename S, typename T2, typename F2>
friend S operator&(const S &p, const swapped_t v);
// Comparison
template <typename S, typename T2, typename F2>
friend bool operator<(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator>(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator<=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator>=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator!=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator==(const S &p, const swapped_t v);
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};
// Arithmetics
template <typename S, typename T, typename F>
S operator+(const S &i, const swap_struct_t<T, F> v) {
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return i + v.swap();
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}
template <typename S, typename T, typename F>
S operator-(const S &i, const swap_struct_t<T, F> v) {
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return i - v.swap();
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}
template <typename S, typename T, typename F>
S operator/(const S &i, const swap_struct_t<T, F> v) {
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return i / v.swap();
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}
template <typename S, typename T, typename F>
S operator*(const S &i, const swap_struct_t<T, F> v) {
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return i * v.swap();
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}
template <typename S, typename T, typename F>
S operator%(const S &i, const swap_struct_t<T, F> v) {
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return i % v.swap();
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}
// Arithmetics + assignements
template <typename S, typename T, typename F>
S &operator+=(S &i, const swap_struct_t<T, F> v) {
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i += v.swap();
return i;
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}
template <typename S, typename T, typename F>
S &operator-=(S &i, const swap_struct_t<T, F> v) {
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i -= v.swap();
return i;
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}
// Logical
template <typename S, typename T, typename F>
S operator&(const S &i, const swap_struct_t<T, F> v) {
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return i & v.swap();
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}
template <typename S, typename T, typename F>
S operator&(const swap_struct_t<T, F> v, const S &i) {
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return (S)(v.swap() & i);
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}
// Comparaison
template <typename S, typename T, typename F>
bool operator<(const S &p, const swap_struct_t<T, F> v) {
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return p < v.swap();
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}
template <typename S, typename T, typename F>
bool operator>(const S &p, const swap_struct_t<T, F> v) {
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return p > v.swap();
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}
template <typename S, typename T, typename F>
bool operator<=(const S &p, const swap_struct_t<T, F> v) {
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return p <= v.swap();
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}
template <typename S, typename T, typename F>
bool operator>=(const S &p, const swap_struct_t<T, F> v) {
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return p >= v.swap();
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}
template <typename S, typename T, typename F>
bool operator!=(const S &p, const swap_struct_t<T, F> v) {
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return p != v.swap();
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}
template <typename S, typename T, typename F>
bool operator==(const S &p, const swap_struct_t<T, F> v) {
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return p == v.swap();
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}
template <typename T>
struct swap_64_t {
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static T swap(T x) {
return static_cast<T>(Common::swap64(x));
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}
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};
template <typename T>
struct swap_32_t {
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static T swap(T x) {
return static_cast<T>(Common::swap32(x));
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}
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};
template <typename T>
struct swap_16_t {
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static T swap(T x) {
return static_cast<T>(Common::swap16(x));
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}
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};
template <typename T>
struct swap_float_t {
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static T swap(T x) {
return static_cast<T>(Common::swapf(x));
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}
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};
template <typename T>
struct swap_double_t {
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static T swap(T x) {
return static_cast<T>(Common::swapd(x));
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}
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};
#if COMMON_LITTLE_ENDIAN
typedef u32 u32_le;
typedef u16 u16_le;
typedef u64 u64_le;
typedef s32 s32_le;
typedef s16 s16_le;
typedef s64 s64_le;
typedef float float_le;
typedef double double_le;
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typedef swap_struct_t<u64, swap_64_t<u64> > u64_be;
typedef swap_struct_t<s64, swap_64_t<s64> > s64_be;
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typedef swap_struct_t<u32, swap_32_t<u32> > u32_be;
typedef swap_struct_t<s32, swap_32_t<s32> > s32_be;
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typedef swap_struct_t<u16, swap_16_t<u16> > u16_be;
typedef swap_struct_t<s16, swap_16_t<s16> > s16_be;
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typedef swap_struct_t<float, swap_float_t<float> > float_be;
typedef swap_struct_t<double, swap_double_t<double> > double_be;
#else
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typedef swap_struct_t<u64, swap_64_t<u64> > u64_le;
typedef swap_struct_t<s64, swap_64_t<s64> > s64_le;
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typedef swap_struct_t<u32, swap_32_t<u32> > u32_le;
typedef swap_struct_t<s32, swap_32_t<s32> > s32_le;
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typedef swap_struct_t<u16, swap_16_t<u16> > u16_le;
typedef swap_struct_t< s16, swap_16_t<s16> > s16_le;
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typedef swap_struct_t<float, swap_float_t<float> > float_le;
typedef swap_struct_t<double, swap_double_t<double> > double_le;
typedef u32 u32_be;
typedef u16 u16_be;
typedef u64 u64_be;
typedef s32 s32_be;
typedef s16 s16_be;
typedef s64 s64_be;
typedef float float_be;
typedef double double_be;
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#endif