diff options
Diffstat (limited to 'macosx/plugins/DFInput/SDL/include/SDL_endian.h')
| -rw-r--r-- | macosx/plugins/DFInput/SDL/include/SDL_endian.h | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/macosx/plugins/DFInput/SDL/include/SDL_endian.h b/macosx/plugins/DFInput/SDL/include/SDL_endian.h new file mode 100644 index 0000000..de69e32 --- /dev/null +++ b/macosx/plugins/DFInput/SDL/include/SDL_endian.h @@ -0,0 +1,258 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2010 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ + +/** + * \file SDL_endian.h + * + * Functions for reading and writing endian-specific values + */ + +#ifndef _SDL_endian_h +#define _SDL_endian_h + +#include "SDL_stdinc.h" + +/** + * \name The two types of endianness + */ +/*@{*/ +#define SDL_LIL_ENDIAN 1234 +#define SDL_BIG_ENDIAN 4321 +/*@}*/ + +#ifndef SDL_BYTEORDER /* Not defined in SDL_config.h? */ +#ifdef __linux__ +#include <endian.h> +#define SDL_BYTEORDER __BYTE_ORDER +#else /* __linux __ */ +#if defined(__hppa__) || \ + defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \ + (defined(__MIPS__) && defined(__MISPEB__)) || \ + defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || \ + defined(__sparc__) +#define SDL_BYTEORDER SDL_BIG_ENDIAN +#else +#define SDL_BYTEORDER SDL_LIL_ENDIAN +#endif +#endif /* __linux __ */ +#endif /* !SDL_BYTEORDER */ + + +#include "begin_code.h" +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +/* *INDENT-OFF* */ +extern "C" { +/* *INDENT-ON* */ +#endif + +/** + * \file SDL_endian.h + * + * Uses inline functions for compilers that support them, and static + * functions for those that do not. Because these functions become + * static for compilers that do not support inline functions, this + * header should only be included in files that actually use them. + */ +#if defined(__GNUC__) && defined(__i386__) && \ + !(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */) +static __inline__ Uint16 +SDL_Swap16(Uint16 x) +{ + __asm__("xchgb %b0,%h0": "=q"(x):"0"(x)); + return x; +} +#elif defined(__GNUC__) && defined(__x86_64__) +static __inline__ Uint16 +SDL_Swap16(Uint16 x) +{ + __asm__("xchgb %b0,%h0": "=Q"(x):"0"(x)); + return x; +} +#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) +static __inline__ Uint16 +SDL_Swap16(Uint16 x) +{ + Uint16 result; + + __asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x)); + return result; +} +#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__) +static __inline__ Uint16 +SDL_Swap16(Uint16 x) +{ + __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc"); + return x; +} +#else +static __inline__ Uint16 +SDL_Swap16(Uint16 x) +{ + return SDL_static_cast(Uint16, ((x << 8) | (x >> 8))); +} +#endif + +#if defined(__GNUC__) && defined(__i386__) +static __inline__ Uint32 +SDL_Swap32(Uint32 x) +{ + __asm__("bswap %0": "=r"(x):"0"(x)); + return x; +} +#elif defined(__GNUC__) && defined(__x86_64__) +static __inline__ Uint32 +SDL_Swap32(Uint32 x) +{ + __asm__("bswapl %0": "=r"(x):"0"(x)); + return x; +} +#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) +static __inline__ Uint32 +SDL_Swap32(Uint32 x) +{ + Uint32 result; + + __asm__("rlwimi %0,%2,24,16,23": "=&r"(result):"0"(x >> 24), "r"(x)); + __asm__("rlwimi %0,%2,8,8,15": "=&r"(result):"0"(result), "r"(x)); + __asm__("rlwimi %0,%2,24,0,7": "=&r"(result):"0"(result), "r"(x)); + return result; +} +#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__) +static __inline__ Uint32 +SDL_Swap32(Uint32 x) +{ + __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0": "=d"(x): "0"(x):"cc"); + return x; +} +#else +static __inline__ Uint32 +SDL_Swap32(Uint32 x) +{ + return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) | + ((x >> 8) & 0x0000FF00) | (x >> 24))); +} +#endif + +#ifdef SDL_HAS_64BIT_TYPE +#if defined(__GNUC__) && defined(__i386__) +static __inline__ Uint64 +SDL_Swap64(Uint64 x) +{ + union + { + struct + { + Uint32 a, b; + } s; + Uint64 u; + } v; + v.u = x; + __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1": "=r"(v.s.a), "=r"(v.s.b):"0"(v.s.a), + "1"(v.s. + b)); + return v.u; +} +#elif defined(__GNUC__) && defined(__x86_64__) +static __inline__ Uint64 +SDL_Swap64(Uint64 x) +{ + __asm__("bswapq %0": "=r"(x):"0"(x)); + return x; +} +#else +static __inline__ Uint64 +SDL_Swap64(Uint64 x) +{ + Uint32 hi, lo; + + /* Separate into high and low 32-bit values and swap them */ + lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF); + x >>= 32; + hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF); + x = SDL_Swap32(lo); + x <<= 32; + x |= SDL_Swap32(hi); + return (x); +} +#endif +#else +/** + * This is mainly to keep compilers from complaining in SDL code. + * If there is no real 64-bit datatype, then compilers will complain about + * the fake 64-bit datatype that SDL provides when it compiles user code. + */ +#define SDL_Swap64(X) (X) +#endif /* SDL_HAS_64BIT_TYPE */ + + +static __inline__ float +SDL_SwapFloat(float x) +{ + union + { + float f; + Uint32 ui32; + } swapper; + swapper.f = x; + swapper.ui32 = SDL_Swap32(swapper.ui32); + return swapper.f; +} + + +/** + * \name Swap to native + * Byteswap item from the specified endianness to the native endianness. + */ +/*@{*/ +#if SDL_BYTEORDER == SDL_LIL_ENDIAN +#define SDL_SwapLE16(X) (X) +#define SDL_SwapLE32(X) (X) +#define SDL_SwapLE64(X) (X) +#define SDL_SwapFloatLE(X) (X) +#define SDL_SwapBE16(X) SDL_Swap16(X) +#define SDL_SwapBE32(X) SDL_Swap32(X) +#define SDL_SwapBE64(X) SDL_Swap64(X) +#define SDL_SwapFloatBE(X) SDL_SwapFloat(X) +#else +#define SDL_SwapLE16(X) SDL_Swap16(X) +#define SDL_SwapLE32(X) SDL_Swap32(X) +#define SDL_SwapLE64(X) SDL_Swap64(X) +#define SDL_SwapFloatLE(X) SDL_SwapFloat(X) +#define SDL_SwapBE16(X) (X) +#define SDL_SwapBE32(X) (X) +#define SDL_SwapBE64(X) (X) +#define SDL_SwapFloatBE(X) (X) +#endif +/*@}*//*Swap to native*/ + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +/* *INDENT-OFF* */ +} +/* *INDENT-ON* */ +#endif +#include "close_code.h" + +#endif /* _SDL_endian_h */ + +/* vi: set ts=4 sw=4 expandtab: */ |