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Diffstat (limited to 'src/mesa/util/compiler.h')
| -rw-r--r-- | src/mesa/util/compiler.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/mesa/util/compiler.h b/src/mesa/util/compiler.h new file mode 100644 index 00000000..da602cfa --- /dev/null +++ b/src/mesa/util/compiler.h @@ -0,0 +1,89 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009 VMware, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + + +/** + * \file compiler.h + * Compiler-related stuff. + */ + + +#ifndef COMPILER_H +#define COMPILER_H + + +#include <assert.h> + +#include "util/macros.h" + +#include "c99_compat.h" /* inline, __func__, etc. */ + + +/** + * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32. + * Do not use these unless absolutely necessary! + * Try to use a runtime test instead. + * For now, only used by some DRI hardware drivers for color/texel packing. + */ +#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN +#if defined(__linux__) +#include <byteswap.h> +#define CPU_TO_LE32( x ) bswap_32( x ) +#elif defined(__APPLE__) +#include <CoreFoundation/CFByteOrder.h> +#define CPU_TO_LE32( x ) CFSwapInt32HostToLittle( x ) +#elif defined(__OpenBSD__) +#include <sys/types.h> +#define CPU_TO_LE32( x ) htole32( x ) +#else /*__linux__ */ +#include <sys/endian.h> +#define CPU_TO_LE32( x ) bswap32( x ) +#endif /*__linux__*/ +#define MESA_BIG_ENDIAN 1 +#else +#define CPU_TO_LE32( x ) ( x ) +#define MESA_LITTLE_ENDIAN 1 +#endif +#define LE32_TO_CPU( x ) CPU_TO_LE32( x ) + + + +#define IEEE_ONE 0x3f800000 + +#ifndef __has_attribute +# define __has_attribute(x) 0 +#endif + +#if __cplusplus >= 201703L || __STDC_VERSION__ > 201710L +/* Standard C++17/C23 attribute */ +#define FALLTHROUGH [[fallthrough]] +#elif __has_attribute(fallthrough) +/* Non-standard but supported by at least gcc and clang */ +#define FALLTHROUGH __attribute__((fallthrough)) +#else +#define FALLTHROUGH do { } while(0) +#endif + +#endif /* COMPILER_H */ |