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Merge pull request #630 from archshift/swap

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Removed swap code redundancy and moved common swap code to swap.h
This commit is contained in:
bunnei 2015-03-06 10:29:58 -05:00
commit 53ba65db43
3 changed files with 97 additions and 127 deletions
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36
src/common/common.h
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@ -117,40 +117,4 @@ enum EMUSTATE_CHANGE
EMUSTATE_CHANGE_STOP
};
#ifdef _MSC_VER
inline unsigned long long bswap64(unsigned long long x) { return _byteswap_uint64(x); }
inline unsigned int bswap32(unsigned int x) { return _byteswap_ulong(x); }
inline unsigned short bswap16(unsigned short x) { return _byteswap_ushort(x); }
#else
// TODO: speedup
inline unsigned short bswap16(unsigned short x) { return (x << 8) | (x >> 8); }
inline unsigned int bswap32(unsigned int x) { return (x >> 24) | ((x & 0xFF0000) >> 8) | ((x & 0xFF00) << 8) | (x << 24);}
inline unsigned long long bswap64(unsigned long long x) {return ((unsigned long long)bswap32(x) << 32) | bswap32(x >> 32); }
#endif
inline float bswapf(float f) {
union {
float f;
unsigned int u32;
} dat1, dat2;
dat1.f = f;
dat2.u32 = bswap32(dat1.u32);
return dat2.f;
}
inline double bswapd(double f) {
union {
double f;
unsigned long long u64;
} dat1, dat2;
dat1.f = f;
dat2.u64 = bswap64(dat1.u64);
return dat2.f;
}
#include "swap.h"

77
src/common/common_funcs.h
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@ -37,11 +37,6 @@
#ifndef _MSC_VER
#include <errno.h>
#ifdef __linux__
#include <byteswap.h>
#elif defined __FreeBSD__
#include <sys/endian.h>
#endif
#if defined(__x86_64__) || defined(_M_X64)
#define Crash() __asm__ __volatile__("int $3")
@ -145,75 +140,3 @@ inline u64 _rotr64(u64 x, unsigned int shift){
// This function might change the error code.
// Defined in Misc.cpp.
const char* GetLastErrorMsg();
namespace Common
{
inline u8 swap8(u8 _data) {return _data;}
inline u32 swap24(const u8* _data) {return (_data[0] << 16) | (_data[1] << 8) | _data[2];}
#ifdef ANDROID
#undef swap16
#undef swap32
#undef swap64
#endif
#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 u16 swap16(const u8* _pData) {return swap16(*(const u16*)_pData);}
inline u32 swap32(const u8* _pData) {return swap32(*(const u32*)_pData);}
inline u64 swap64(const u8* _pData) {return swap64(*(const u64*)_pData);}
template <int count>
void swap(u8*);
template <>
inline void swap<1>(u8* data)
{}
template <>
inline void swap<2>(u8* data)
{
*reinterpret_cast<u16*>(data) = swap16(data);
}
template <>
inline void swap<4>(u8* data)
{
*reinterpret_cast<u32*>(data) = swap32(data);
}
template <>
inline void swap<8>(u8* data)
{
*reinterpret_cast<u64*>(data) = swap64(data);
}
} // Namespace Common

111
src/common/swap.h
View File

@ -17,18 +17,14 @@
#pragma once
// Android
#if defined(ANDROID)
#if defined(__linux__)
#include <byteswap.h>
#elif defined(__FreeBSD__)
#include <sys/endian.h>
#if _BYTE_ORDER == _LITTLE_ENDIAN && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif _BYTE_ORDER == _BIG_ENDIAN && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// GCC 4.6+
#elif __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
@ -49,7 +45,6 @@
#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#endif
// Worst case, default to little endian.
@ -57,6 +52,93 @@
#define COMMON_LITTLE_ENDIAN 1
#endif
namespace Common {
inline u8 swap8(u8 _data) {return _data;}
inline u32 swap24(const u8* _data) {return (_data[0] << 16) | (_data[1] << 8) | _data[2];}
#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) {
union {
float f;
unsigned int u32;
} dat1, dat2;
dat1.f = f;
dat2.u32 = swap32(dat1.u32);
return dat2.f;
}
inline double swapd(double f) {
union {
double f;
unsigned long long u64;
} dat1, dat2;
dat1.f = f;
dat2.u64 = swap64(dat1.u64);
return dat2.f;
}
inline u16 swap16(const u8* _pData) {return swap16(*(const u16*)_pData);}
inline u32 swap32(const u8* _pData) {return swap32(*(const u32*)_pData);}
inline u64 swap64(const u8* _pData) {return swap64(*(const u64*)_pData);}
template <int count>
void swap(u8*);
template <>
inline void swap<1>(u8* data) { }
template <>
inline void swap<2>(u8* data) {
*reinterpret_cast<u16*>(data) = swap16(data);
}
template <>
inline void swap<4>(u8* data) {
*reinterpret_cast<u32*>(data) = swap32(data);
}
template <>
inline void swap<8>(u8* data) {
*reinterpret_cast<u64*>(data) = swap64(data);
}
} // Namespace Common
template <typename T, typename F>
struct swap_struct_t {
typedef swap_struct_t<T, F> swapped_t;
@ -448,35 +530,35 @@ bool operator==(const S &p, const swap_struct_t<T, F> v) {
template <typename T>
struct swap_64_t {
static T swap(T x) {
return (T)bswap64(*(u64 *)&x);
return (T)Common::swap64(*(u64 *)&x);
}
};
template <typename T>
struct swap_32_t {
static T swap(T x) {
return (T)bswap32(*(u32 *)&x);
return (T)Common::swap32(*(u32 *)&x);
}
};
template <typename T>
struct swap_16_t {
static T swap(T x) {
return (T)bswap16(*(u16 *)&x);
return (T)Common::swap16(*(u16 *)&x);
}
};
template <typename T>
struct swap_float_t {
static T swap(T x) {
return (T)bswapf(*(float *)&x);
return (T)Common::swapf(*(float *)&x);
}
};
template <typename T>
struct swap_double_t {
static T swap(T x) {
return (T)bswapd(*(double *)&x);
return (T)Common::swapd(*(double *)&x);
}
};
@ -527,4 +609,5 @@ typedef s64 s64_be;
typedef float float_be;
typedef double double_be;
#endif