+++ /dev/null
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2022 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"
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1400)
-/* As of Clang 11, '_m_prefetchw' is conflicting with the winnt.h's version,
- so we define the needed '_m_prefetch' here as a pseudo-header, until the issue is fixed. */
-#ifdef __clang__
-#ifndef __PRFCHWINTRIN_H
-#define __PRFCHWINTRIN_H
-static __inline__ void __attribute__((__always_inline__, __nodebug__))
-_m_prefetch(void *__P)
-{
- __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
-}
-#endif /* __PRFCHWINTRIN_H */
-#endif /* __clang__ */
-
-#include <intrin.h>
-#endif
-
-/**
- * \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
-#elif defined(__OpenBSD__)
-#include <endian.h>
-#define SDL_BYTEORDER BYTE_ORDER
-#elif defined(__FreeBSD__) || defined(__NetBSD__)
-#include <sys/endian.h>
-#define SDL_BYTEORDER BYTE_ORDER
-/* predefs from newer gcc and clang versions: */
-#elif defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__) && defined(__BYTE_ORDER__)
-#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
-#define SDL_BYTEORDER SDL_LIL_ENDIAN
-#elif (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-#define SDL_BYTEORDER SDL_BIG_ENDIAN
-#else
-#error Unsupported endianness
-#endif /**/
-#else
-#if defined(__hppa__) || \
- defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
- (defined(__MIPS__) && defined(__MIPSEB__)) || \
- 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
- */
-
-/* various modern compilers may have builtin swap */
-#if defined(__GNUC__) || defined(__clang__)
-# define HAS_BUILTIN_BSWAP16 (_SDL_HAS_BUILTIN(__builtin_bswap16)) || \
- (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))
-# define HAS_BUILTIN_BSWAP32 (_SDL_HAS_BUILTIN(__builtin_bswap32)) || \
- (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
-# define HAS_BUILTIN_BSWAP64 (_SDL_HAS_BUILTIN(__builtin_bswap64)) || \
- (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
-
- /* this one is broken */
-# define HAS_BROKEN_BSWAP (__GNUC__ == 2 && __GNUC_MINOR__ <= 95)
-#else
-# define HAS_BUILTIN_BSWAP16 0
-# define HAS_BUILTIN_BSWAP32 0
-# define HAS_BUILTIN_BSWAP64 0
-# define HAS_BROKEN_BSWAP 0
-#endif
-
-#if HAS_BUILTIN_BSWAP16
-#define SDL_Swap16(x) __builtin_bswap16(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
-#pragma intrinsic(_byteswap_ushort)
-#define SDL_Swap16(x) _byteswap_ushort(x)
-#elif defined(__i386__) && !HAS_BROKEN_BSWAP
-SDL_FORCE_INLINE Uint16
-SDL_Swap16(Uint16 x)
-{
- __asm__("xchgb %b0,%h0": "=q"(x):"0"(x));
- return x;
-}
-#elif defined(__x86_64__)
-SDL_FORCE_INLINE Uint16
-SDL_Swap16(Uint16 x)
-{
- __asm__("xchgb %b0,%h0": "=Q"(x):"0"(x));
- return x;
-}
-#elif (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(__m68k__) && !defined(__mcoldfire__))
-SDL_FORCE_INLINE Uint16
-SDL_Swap16(Uint16 x)
-{
- __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc");
- return x;
-}
-#elif defined(__WATCOMC__) && defined(__386__)
-extern __inline Uint16 SDL_Swap16(Uint16);
-#pragma aux SDL_Swap16 = \
- "xchg al, ah" \
- parm [ax] \
- modify [ax];
-#else
-SDL_FORCE_INLINE Uint16
-SDL_Swap16(Uint16 x)
-{
- return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
-}
-#endif
-
-#if HAS_BUILTIN_BSWAP32
-#define SDL_Swap32(x) __builtin_bswap32(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
-#pragma intrinsic(_byteswap_ulong)
-#define SDL_Swap32(x) _byteswap_ulong(x)
-#elif defined(__i386__) && !HAS_BROKEN_BSWAP
-SDL_FORCE_INLINE Uint32
-SDL_Swap32(Uint32 x)
-{
- __asm__("bswap %0": "=r"(x):"0"(x));
- return x;
-}
-#elif defined(__x86_64__)
-SDL_FORCE_INLINE Uint32
-SDL_Swap32(Uint32 x)
-{
- __asm__("bswapl %0": "=r"(x):"0"(x));
- return x;
-}
-#elif (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(__m68k__) && !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;
-}
-#elif defined(__WATCOMC__) && defined(__386__)
-extern __inline Uint32 SDL_Swap32(Uint32);
-#pragma aux SDL_Swap32 = \
- "bswap eax" \
- parm [eax] \
- modify [eax];
-#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 HAS_BUILTIN_BSWAP64
-#define SDL_Swap64(x) __builtin_bswap64(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
-#pragma intrinsic(_byteswap_uint64)
-#define SDL_Swap64(x) _byteswap_uint64(x)
-#elif defined(__i386__) && !HAS_BROKEN_BSWAP
-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(__x86_64__)
-SDL_FORCE_INLINE Uint64
-SDL_Swap64(Uint64 x)
-{
- __asm__("bswapq %0": "=r"(x):"0"(x));
- return x;
-}
-#elif defined(__WATCOMC__) && defined(__386__)
-extern __inline Uint64 SDL_Swap64(Uint64);
-#pragma aux SDL_Swap64 = \
- "bswap eax" \
- "bswap edx" \
- "xchg eax,edx" \
- parm [eax edx] \
- modify [eax edx];
-#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;
-}
-
-/* remove extra macros */
-#undef HAS_BROKEN_BSWAP
-#undef HAS_BUILTIN_BSWAP16
-#undef HAS_BUILTIN_BSWAP32
-#undef HAS_BUILTIN_BSWAP64
-
-/**
- * \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: */
projects / xonotic / darkplaces.git / blobdiff