aef4630102
Also gets rid of pointer data variants as this prevents the use of the regular swapping routines as unary predicates in std lib functions. They also cast to stricter alignment types, which is undefined behavior.
590 lines
15 KiB
C++
590 lines
15 KiB
C++
// Copyright (c) 2012- PPSSPP Project / Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#if defined(_MSC_VER)
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#include <cstdlib>
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#elif defined(__linux__)
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#include <byteswap.h>
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#elif defined(__FreeBSD__)
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#include <sys/endian.h>
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#endif
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#include "common/common_types.h"
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// GCC 4.6+
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#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
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#define COMMON_BIG_ENDIAN 1
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#endif
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// LLVM/clang
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#elif __clang__
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#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
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#define COMMON_BIG_ENDIAN 1
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#endif
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// MSVC
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#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#endif
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// Worst case, default to little endian.
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#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
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#define COMMON_LITTLE_ENDIAN 1
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#endif
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namespace Common {
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#ifdef _MSC_VER
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inline u16 swap16(u16 _data) {return _byteswap_ushort(_data);}
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inline u32 swap32(u32 _data) {return _byteswap_ulong (_data);}
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inline u64 swap64(u64 _data) {return _byteswap_uint64(_data);}
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#elif _M_ARM
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inline u16 swap16 (u16 _data) { u32 data = _data; __asm__ ("rev16 %0, %1\n" : "=l" (data) : "l" (data)); return (u16)data;}
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inline u32 swap32 (u32 _data) {__asm__ ("rev %0, %1\n" : "=l" (_data) : "l" (_data)); return _data;}
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inline u64 swap64(u64 _data) {return ((u64)swap32(_data) << 32) | swap32(_data >> 32);}
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#elif __linux__
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inline u16 swap16(u16 _data) {return bswap_16(_data);}
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inline u32 swap32(u32 _data) {return bswap_32(_data);}
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inline u64 swap64(u64 _data) {return bswap_64(_data);}
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#elif __APPLE__
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inline __attribute__((always_inline)) u16 swap16(u16 _data)
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{return (_data >> 8) | (_data << 8);}
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inline __attribute__((always_inline)) u32 swap32(u32 _data)
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{return __builtin_bswap32(_data);}
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inline __attribute__((always_inline)) u64 swap64(u64 _data)
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{return __builtin_bswap64(_data);}
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#elif __FreeBSD__
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inline u16 swap16(u16 _data) {return bswap16(_data);}
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inline u32 swap32(u32 _data) {return bswap32(_data);}
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inline u64 swap64(u64 _data) {return bswap64(_data);}
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#else
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// Slow generic implementation.
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inline u16 swap16(u16 data) {return (data >> 8) | (data << 8);}
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inline u32 swap32(u32 data) {return (swap16(data) << 16) | swap16(data >> 16);}
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inline u64 swap64(u64 data) {return ((u64)swap32(data) << 32) | swap32(data >> 32);}
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#endif
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inline float swapf(float f) {
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union {
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float f;
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unsigned int u32;
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} dat1, dat2;
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dat1.f = f;
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dat2.u32 = swap32(dat1.u32);
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return dat2.f;
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}
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inline double swapd(double f) {
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union {
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double f;
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unsigned long long u64;
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} dat1, dat2;
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dat1.f = f;
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dat2.u64 = swap64(dat1.u64);
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return dat2.f;
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}
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} // Namespace Common
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template <typename T, typename F>
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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) {
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return F::swap(v);
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}
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public:
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T const swap() const {
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return swap(value);
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}
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swap_struct_t() = default;
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swap_struct_t(const T &v): value(swap(v)) {}
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template <typename S>
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swapped_t& operator=(const S &source) {
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value = swap((T)source);
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return *this;
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}
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operator s8() const { return (s8)swap(); }
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operator u8() const { return (u8)swap(); }
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operator s16() const { return (s16)swap(); }
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operator u16() const { return (u16)swap(); }
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operator s32() const { return (s32)swap(); }
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operator u32() const { return (u32)swap(); }
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operator s64() const { return (s64)swap(); }
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operator u64() const { return (u64)swap(); }
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operator float() const { return (float)swap(); }
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operator double() const { return (double)swap(); }
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// +v
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swapped_t operator +() const {
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return +swap();
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}
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// -v
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swapped_t operator -() const {
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return -swap();
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}
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// v / 5
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swapped_t operator/(const swapped_t &i) const {
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return swap() / i.swap();
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}
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template <typename S>
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swapped_t operator/(const S &i) const {
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return swap() / i;
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}
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// v * 5
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swapped_t operator*(const swapped_t &i) const {
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return swap() * i.swap();
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}
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template <typename S>
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swapped_t operator*(const S &i) const {
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return swap() * i;
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}
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// v + 5
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swapped_t operator+(const swapped_t &i) const {
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return swap() + i.swap();
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}
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template <typename S>
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swapped_t operator+(const S &i) const {
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return swap() + (T)i;
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}
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// v - 5
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swapped_t operator-(const swapped_t &i) const {
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return swap() - i.swap();
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}
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template <typename S>
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swapped_t operator-(const S &i) const {
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return swap() - (T)i;
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}
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// v += 5
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swapped_t& operator+=(const swapped_t &i) {
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value = swap(swap() + i.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator+=(const S &i) {
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value = swap(swap() + (T)i);
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return *this;
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}
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// v -= 5
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swapped_t& operator-=(const swapped_t &i) {
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value = swap(swap() - i.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator-=(const S &i) {
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value = swap(swap() - (T)i);
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return *this;
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}
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// ++v
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swapped_t& operator++() {
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value = swap(swap()+1);
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return *this;
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}
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// --v
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swapped_t& operator--() {
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value = swap(swap()-1);
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return *this;
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}
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// v++
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swapped_t operator++(int) {
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swapped_t old = *this;
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value = swap(swap()+1);
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return old;
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}
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// v--
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swapped_t operator--(int) {
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swapped_t old = *this;
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value = swap(swap()-1);
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return old;
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}
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// Comparaison
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// v == i
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bool operator==(const swapped_t &i) const {
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return swap() == i.swap();
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}
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template <typename S>
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bool operator==(const S &i) const {
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return swap() == i;
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}
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// v != i
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bool operator!=(const swapped_t &i) const {
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return swap() != i.swap();
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}
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template <typename S>
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bool operator!=(const S &i) const {
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return swap() != i;
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}
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// v > i
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bool operator>(const swapped_t &i) const {
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return swap() > i.swap();
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}
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template <typename S>
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bool operator>(const S &i) const {
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return swap() > i;
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}
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// v < i
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bool operator<(const swapped_t &i) const {
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return swap() < i.swap();
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}
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template <typename S>
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bool operator<(const S &i) const {
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return swap() < i;
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}
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// v >= i
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bool operator>=(const swapped_t &i) const {
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return swap() >= i.swap();
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}
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template <typename S>
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bool operator>=(const S &i) const {
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return swap() >= i;
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}
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// v <= i
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bool operator<=(const swapped_t &i) const {
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return swap() <= i.swap();
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}
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template <typename S>
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bool operator<=(const S &i) const {
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return swap() <= i;
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}
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// logical
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swapped_t operator !() const {
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return !swap();
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}
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// bitmath
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swapped_t operator ~() const {
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return ~swap();
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}
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swapped_t operator &(const swapped_t &b) const {
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return swap() & b.swap();
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}
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template <typename S>
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swapped_t operator &(const S &b) const {
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return swap() & b;
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}
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swapped_t& operator &=(const swapped_t &b) {
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value = swap(swap() & b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator &=(const S b) {
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value = swap(swap() & b);
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return *this;
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}
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swapped_t operator |(const swapped_t &b) const {
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return swap() | b.swap();
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}
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template <typename S>
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swapped_t operator |(const S &b) const {
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return swap() | b;
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}
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swapped_t& operator |=(const swapped_t &b) {
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value = swap(swap() | b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator |=(const S &b) {
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value = swap(swap() | b);
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return *this;
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}
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swapped_t operator ^(const swapped_t &b) const {
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return swap() ^ b.swap();
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}
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template <typename S>
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swapped_t operator ^(const S &b) const {
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return swap() ^ b;
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}
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swapped_t& operator ^=(const swapped_t &b) {
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value = swap(swap() ^ b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator ^=(const S &b) {
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value = swap(swap() ^ b);
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return *this;
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}
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template <typename S>
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swapped_t operator <<(const S &b) const {
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return swap() << b;
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}
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template <typename S>
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swapped_t& operator <<=(const S &b) const {
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value = swap(swap() << b);
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return *this;
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}
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template <typename S>
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swapped_t operator >>(const S &b) const {
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return swap() >> b;
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}
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template <typename S>
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swapped_t& operator >>=(const S &b) const {
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value = swap(swap() >> b);
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return *this;
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}
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// Member
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/** todo **/
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// Arithmetics
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template <typename S, typename T2, typename F2>
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friend S operator+(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator-(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator/(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator*(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator%(const S &p, const swapped_t v);
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// Arithmetics + assignements
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template <typename S, typename T2, typename F2>
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friend S operator+=(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator-=(const S &p, const swapped_t v);
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// Bitmath
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template <typename S, typename T2, typename F2>
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friend S operator&(const S &p, const swapped_t v);
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// Comparison
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template <typename S, typename T2, typename F2>
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friend bool operator<(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator>(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator<=(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator>=(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator!=(const S &p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator==(const S &p, const swapped_t v);
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};
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// Arithmetics
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template <typename S, typename T, typename F>
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S operator+(const S &i, const swap_struct_t<T, F> v) {
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return i + v.swap();
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}
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template <typename S, typename T, typename F>
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S operator-(const S &i, const swap_struct_t<T, F> v) {
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return i - v.swap();
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}
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template <typename S, typename T, typename F>
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S operator/(const S &i, const swap_struct_t<T, F> v) {
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return i / v.swap();
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}
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template <typename S, typename T, typename F>
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S operator*(const S &i, const swap_struct_t<T, F> v) {
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return i * v.swap();
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}
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template <typename S, typename T, typename F>
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S operator%(const S &i, const swap_struct_t<T, F> v) {
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return i % v.swap();
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}
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// Arithmetics + assignements
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template <typename S, typename T, typename F>
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S &operator+=(S &i, const swap_struct_t<T, F> v) {
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i += v.swap();
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return i;
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}
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template <typename S, typename T, typename F>
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S &operator-=(S &i, const swap_struct_t<T, F> v) {
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i -= v.swap();
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return i;
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}
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// Logical
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template <typename S, typename T, typename F>
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S operator&(const S &i, const swap_struct_t<T, F> v) {
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return i & v.swap();
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}
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template <typename S, typename T, typename F>
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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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}
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// Comparaison
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template <typename S, typename T, typename F>
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bool operator<(const S &p, const swap_struct_t<T, F> v) {
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return p < v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator>(const S &p, const swap_struct_t<T, F> v) {
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return p > v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator<=(const S &p, const swap_struct_t<T, F> v) {
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return p <= v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator>=(const S &p, const swap_struct_t<T, F> v) {
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return p >= v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator!=(const S &p, const swap_struct_t<T, F> v) {
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return p != v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator==(const S &p, const swap_struct_t<T, F> v) {
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return p == v.swap();
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}
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template <typename T>
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struct swap_64_t {
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static T swap(T x) {
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return (T)Common::swap64(*(u64 *)&x);
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}
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};
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template <typename T>
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struct swap_32_t {
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static T swap(T x) {
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return (T)Common::swap32(*(u32 *)&x);
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}
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};
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template <typename T>
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struct swap_16_t {
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static T swap(T x) {
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return (T)Common::swap16(*(u16 *)&x);
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}
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};
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template <typename T>
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struct swap_float_t {
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static T swap(T x) {
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return (T)Common::swapf(*(float *)&x);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct swap_double_t {
|
|
static T swap(T x) {
|
|
return (T)Common::swapd(*(double *)&x);
|
|
}
|
|
};
|
|
|
|
#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;
|
|
|
|
typedef swap_struct_t<u64, swap_64_t<u64> > u64_be;
|
|
typedef swap_struct_t<s64, swap_64_t<s64> > s64_be;
|
|
|
|
typedef swap_struct_t<u32, swap_32_t<u32> > u32_be;
|
|
typedef swap_struct_t<s32, swap_32_t<s32> > s32_be;
|
|
|
|
typedef swap_struct_t<u16, swap_16_t<u16> > u16_be;
|
|
typedef swap_struct_t<s16, swap_16_t<s16> > s16_be;
|
|
|
|
typedef swap_struct_t<float, swap_float_t<float> > float_be;
|
|
typedef swap_struct_t<double, swap_double_t<double> > double_be;
|
|
#else
|
|
|
|
typedef swap_struct_t<u64, swap_64_t<u64> > u64_le;
|
|
typedef swap_struct_t<s64, swap_64_t<s64> > s64_le;
|
|
|
|
typedef swap_struct_t<u32, swap_32_t<u32> > u32_le;
|
|
typedef swap_struct_t<s32, swap_32_t<s32> > s32_le;
|
|
|
|
typedef swap_struct_t<u16, swap_16_t<u16> > u16_le;
|
|
typedef swap_struct_t< s16, swap_16_t<s16> > s16_le;
|
|
|
|
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;
|
|
|
|
#endif
|