253 lines
6.7 KiB
C++
253 lines
6.7 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#ifndef _COMMONFUNCS_H_
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#define _COMMONFUNCS_H_
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#ifdef _WIN32
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#define SLEEP(x) Sleep(x)
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#else
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#include <unistd.h>
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#define SLEEP(x) usleep(x*1000)
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#endif
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#include <cstddef>
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#include <type_traits>
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#include "Common.h"
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// Will fail to compile on a non-array:
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// TODO: make this a function when constexpr is available
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template <typename T>
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struct ArraySizeImpl : public std::extent<T>
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{ static_assert(std::is_array<T>::value, "is array"); };
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#define ArraySize(x) ArraySizeImpl<decltype(x)>::value
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#define b2(x) ( (x) | ( (x) >> 1) )
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#define b4(x) ( b2(x) | ( b2(x) >> 2) )
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#define b8(x) ( b4(x) | ( b4(x) >> 4) )
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#define b16(x) ( b8(x) | ( b8(x) >> 8) )
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#define b32(x) (b16(x) | (b16(x) >>16) )
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#define ROUND_UP_POW2(x) (b32(x - 1) + 1)
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#if defined __GNUC__ && !defined __SSSE3__ && !defined _M_GENERIC
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#include <emmintrin.h>
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static __inline __m128i __attribute__((__always_inline__))
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_mm_shuffle_epi8(__m128i a, __m128i mask)
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{
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__m128i result;
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__asm__("pshufb %1, %0"
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: "=x" (result)
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: "xm" (mask), "0" (a));
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return result;
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}
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#endif
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#ifndef _WIN32
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#include <errno.h>
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#ifdef __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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// go to debugger mode
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#ifdef GEKKO
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#define Crash()
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#elif defined _M_GENERIC
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#define Crash() { exit(1); }
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#else
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#define Crash() {asm ("int $3");}
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#endif
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// GCC 4.8 defines all the rotate functions now
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// Small issue with GCC's lrotl/lrotr intrinsics is they are still 32bit while we require 64bit
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#ifndef _rotl
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inline u32 _rotl(u32 x, int shift) {
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shift &= 31;
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if (!shift) return x;
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return (x << shift) | (x >> (32 - shift));
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}
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inline u32 _rotr(u32 x, int shift) {
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shift &= 31;
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if (!shift) return x;
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return (x >> shift) | (x << (32 - shift));
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}
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#endif
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inline u64 _rotl64(u64 x, unsigned int shift){
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unsigned int n = shift % 64;
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return (x << n) | (x >> (64 - n));
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}
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inline u64 _rotr64(u64 x, unsigned int shift){
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unsigned int n = shift % 64;
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return (x >> n) | (x << (64 - n));
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}
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#else // WIN32
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// Function Cross-Compatibility
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#define strcasecmp _stricmp
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#define strncasecmp _strnicmp
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#define unlink _unlink
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#define snprintf _snprintf
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#define vscprintf _vscprintf
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// Locale Cross-Compatibility
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#define locale_t _locale_t
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#define freelocale _free_locale
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#define newlocale(mask, locale, base) _create_locale(mask, locale)
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#define LC_GLOBAL_LOCALE ((locale_t)-1)
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#define LC_ALL_MASK LC_ALL
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#define LC_COLLATE_MASK LC_COLLATE
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#define LC_CTYPE_MASK LC_CTYPE
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#define LC_MONETARY_MASK LC_MONETARY
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#define LC_NUMERIC_MASK LC_NUMERIC
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#define LC_TIME_MASK LC_TIME
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inline locale_t uselocale(locale_t new_locale)
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{
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// Retrieve the current per thread locale setting
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bool bIsPerThread = (_configthreadlocale(0) == _ENABLE_PER_THREAD_LOCALE);
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// Retrieve the current thread-specific locale
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locale_t old_locale = bIsPerThread ? _get_current_locale() : LC_GLOBAL_LOCALE;
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if(new_locale == LC_GLOBAL_LOCALE)
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{
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// Restore the global locale
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_configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
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}
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else if(new_locale != NULL)
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{
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// Configure the thread to set the locale only for this thread
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_configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
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// Set all locale categories
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for(int i = LC_MIN; i <= LC_MAX; i++)
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setlocale(i, new_locale->locinfo->lc_category[i].locale);
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}
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return old_locale;
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}
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// 64 bit offsets for windows
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#define fseeko _fseeki64
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#define ftello _ftelli64
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#define atoll _atoi64
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#define stat64 _stat64
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#define fstat64 _fstat64
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#define fileno _fileno
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#if _M_IX86
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#define Crash() {__asm int 3}
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#else
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extern "C" {
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__declspec(dllimport) void __stdcall DebugBreak(void);
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}
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#define Crash() {DebugBreak();}
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#endif // M_IX86
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#endif // WIN32 ndef
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// Dolphin's min and max functions
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#undef min
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#undef max
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template<class T>
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inline T min(const T& a, const T& b) {return a > b ? b : a;}
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template<class T>
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inline T max(const T& a, const T& b) {return a > b ? a : b;}
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// Generic function to get last error message.
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// Call directly after the command or use the error num.
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// This function might change the error code.
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// Defined in Misc.cpp.
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const char* GetLastErrorMsg();
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namespace Common
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{
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inline u8 swap8(u8 _data) {return _data;}
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inline u32 swap24(const u8* _data) {return (_data[0] << 16) | (_data[1] << 8) | _data[2];}
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#ifdef ANDROID
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#undef swap16
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#undef swap32
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#undef swap64
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#endif
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#ifdef _WIN32
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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 u16 swap16(const u8* _pData) {return swap16(*(const u16*)_pData);}
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inline u32 swap32(const u8* _pData) {return swap32(*(const u32*)_pData);}
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inline u64 swap64(const u8* _pData) {return swap64(*(const u64*)_pData);}
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template <int count>
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void swap(u8*);
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template <>
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inline void swap<1>(u8* data)
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{}
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template <>
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inline void swap<2>(u8* data)
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{
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*reinterpret_cast<u16*>(data) = swap16(data);
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}
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template <>
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inline void swap<4>(u8* data)
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{
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*reinterpret_cast<u32*>(data) = swap32(data);
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}
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template <>
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inline void swap<8>(u8* data)
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{
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*reinterpret_cast<u64*>(data) = swap64(data);
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}
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template <typename T>
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inline T FromBigEndian(T data)
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{
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//static_assert(std::is_arithmetic<T>::value, "function only makes sense with arithmetic types");
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swap<sizeof(data)>(reinterpret_cast<u8*>(&data));
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return data;
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}
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} // Namespace Common
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#endif // _COMMONFUNCS_H_
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