diff options
Diffstat (limited to 'include/SDL2/SDL_endian.h')
| -rw-r--r-- | include/SDL2/SDL_endian.h | 478 |
1 files changed, 239 insertions, 239 deletions
diff --git a/include/SDL2/SDL_endian.h b/include/SDL2/SDL_endian.h index 161c418..ab71f59 100644 --- a/include/SDL2/SDL_endian.h +++ b/include/SDL2/SDL_endian.h @@ -1,239 +1,239 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ - -/** - * \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 -extern "C" { -#endif - -/** - * \file SDL_endian.h - */ -#if defined(__GNUC__) && defined(__i386__) && \ - !(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */) -SDL_FORCE_INLINE Uint16 -SDL_Swap16(Uint16 x) -{ - __asm__("xchgb %b0,%h0": "=q"(x):"0"(x)); - return x; -} -#elif defined(__GNUC__) && defined(__x86_64__) -SDL_FORCE_INLINE Uint16 -SDL_Swap16(Uint16 x) -{ - __asm__("xchgb %b0,%h0": "=Q"(x):"0"(x)); - return x; -} -#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) -SDL_FORCE_INLINE Uint16 -SDL_Swap16(Uint16 x) -{ - int result; - - __asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x)); - return (Uint16)result; -} -#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__) -SDL_FORCE_INLINE Uint16 -SDL_Swap16(Uint16 x) -{ - __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc"); - return x; -} -#else -SDL_FORCE_INLINE Uint16 -SDL_Swap16(Uint16 x) -{ - return SDL_static_cast(Uint16, ((x << 8) | (x >> 8))); -} -#endif - -#if defined(__GNUC__) && defined(__i386__) -SDL_FORCE_INLINE Uint32 -SDL_Swap32(Uint32 x) -{ - __asm__("bswap %0": "=r"(x):"0"(x)); - return x; -} -#elif defined(__GNUC__) && defined(__x86_64__) -SDL_FORCE_INLINE Uint32 -SDL_Swap32(Uint32 x) -{ - __asm__("bswapl %0": "=r"(x):"0"(x)); - return x; -} -#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) -SDL_FORCE_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__) -SDL_FORCE_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 -SDL_FORCE_INLINE Uint32 -SDL_Swap32(Uint32 x) -{ - return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) | - ((x >> 8) & 0x0000FF00) | (x >> 24))); -} -#endif - -#if defined(__GNUC__) && defined(__i386__) -SDL_FORCE_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__) -SDL_FORCE_INLINE Uint64 -SDL_Swap64(Uint64 x) -{ - __asm__("bswapq %0": "=r"(x):"0"(x)); - return x; -} -#else -SDL_FORCE_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 - - -SDL_FORCE_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 -} -#endif -#include "close_code.h" - -#endif /* _SDL_endian_h */ - -/* vi: set ts=4 sw=4 expandtab: */ +/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+*/
+
+/**
+ * \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
+extern "C" {
+#endif
+
+/**
+ * \file SDL_endian.h
+ */
+#if defined(__GNUC__) && defined(__i386__) && \
+ !(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */)
+SDL_FORCE_INLINE Uint16
+SDL_Swap16(Uint16 x)
+{
+ __asm__("xchgb %b0,%h0": "=q"(x):"0"(x));
+ return x;
+}
+#elif defined(__GNUC__) && defined(__x86_64__)
+SDL_FORCE_INLINE Uint16
+SDL_Swap16(Uint16 x)
+{
+ __asm__("xchgb %b0,%h0": "=Q"(x):"0"(x));
+ return x;
+}
+#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
+SDL_FORCE_INLINE Uint16
+SDL_Swap16(Uint16 x)
+{
+ int result;
+
+ __asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x));
+ return (Uint16)result;
+}
+#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__)
+SDL_FORCE_INLINE Uint16
+SDL_Swap16(Uint16 x)
+{
+ __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc");
+ return x;
+}
+#else
+SDL_FORCE_INLINE Uint16
+SDL_Swap16(Uint16 x)
+{
+ return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
+}
+#endif
+
+#if defined(__GNUC__) && defined(__i386__)
+SDL_FORCE_INLINE Uint32
+SDL_Swap32(Uint32 x)
+{
+ __asm__("bswap %0": "=r"(x):"0"(x));
+ return x;
+}
+#elif defined(__GNUC__) && defined(__x86_64__)
+SDL_FORCE_INLINE Uint32
+SDL_Swap32(Uint32 x)
+{
+ __asm__("bswapl %0": "=r"(x):"0"(x));
+ return x;
+}
+#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
+SDL_FORCE_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__)
+SDL_FORCE_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
+SDL_FORCE_INLINE Uint32
+SDL_Swap32(Uint32 x)
+{
+ return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
+ ((x >> 8) & 0x0000FF00) | (x >> 24)));
+}
+#endif
+
+#if defined(__GNUC__) && defined(__i386__)
+SDL_FORCE_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__)
+SDL_FORCE_INLINE Uint64
+SDL_Swap64(Uint64 x)
+{
+ __asm__("bswapq %0": "=r"(x):"0"(x));
+ return x;
+}
+#else
+SDL_FORCE_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
+
+
+SDL_FORCE_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
+}
+#endif
+#include "close_code.h"
+
+#endif /* _SDL_endian_h */
+
+/* vi: set ts=4 sw=4 expandtab: */
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