3d6b5b5c81d4fcf0babf750caf8ab6aea33426f1
1 /**************************************************************************
3 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
41 #if defined(_WIN32) && !defined(__WIN32__)
47 /* Avoid 'expression is always true' warning */
48 #pragma warning(disable: 4296)
54 * Alternative stdint.h and stdbool.h headers are supplied in include/c99 for
55 * systems that lack it.
57 #ifndef __STDC_LIMIT_MACROS
58 #define __STDC_LIMIT_MACROS 1
69 #if !defined(__HAIKU__) && !defined(__USE_MISC)
70 typedef unsigned int uint
;
71 typedef unsigned short ushort
;
73 typedef unsigned char ubyte
;
75 typedef unsigned char boolean
;
85 #define va_copy(dest, src) __va_copy((dest), (src))
87 #define va_copy(dest, src) (dest) = (src)
91 /* Function inlining */
94 # define INLINE inline
95 # elif defined(__GNUC__)
96 # define INLINE __inline__
97 # elif defined(_MSC_VER)
98 # define INLINE __inline
100 # define INLINE __inline
101 # elif defined(__INTEL_COMPILER)
102 # define INLINE inline
103 # elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
104 # define INLINE __inline
105 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
106 # define INLINE inline
107 # elif (__STDC_VERSION__ >= 199901L) /* C99 */
108 # define INLINE inline
114 /* Forced function inlining */
115 #ifndef ALWAYS_INLINE
117 # define ALWAYS_INLINE inline __attribute__((always_inline))
118 # elif defined(_MSC_VER)
119 # define ALWAYS_INLINE __forceinline
121 # define ALWAYS_INLINE INLINE
126 * Define the C99 restrict keyword.
129 * - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
132 # if (__STDC_VERSION__ >= 199901L)
134 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
136 # elif defined(__GNUC__)
137 # define restrict __restrict__
138 # elif defined(_MSC_VER)
139 # define restrict __restrict
141 # define restrict /* */
146 /* Function visibility */
148 # if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
149 # define PUBLIC __attribute__((visibility("default")))
150 # elif defined(_MSC_VER)
151 # define PUBLIC __declspec(dllexport)
158 /* The __FUNCTION__ gcc variable is generally only used for debugging.
159 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
162 # if !defined(__GNUC__)
163 # if (__STDC_VERSION__ >= 199901L) /* C99 */ || \
164 (defined(__SUNPRO_C) && defined(__C99FEATURES__))
165 # define __FUNCTION__ __func__
167 # define __FUNCTION__ "<unknown>"
170 # if defined(_MSC_VER) && _MSC_VER < 1300
171 # define __FUNCTION__ "<unknown>"
177 /* This should match linux gcc cdecl semantics everywhere, so that we
178 * just codegen one calling convention on all platforms.
181 #define PIPE_CDECL __cdecl
188 #if defined(__GNUC__)
189 #define PIPE_DEPRECATED __attribute__((__deprecated__))
191 #define PIPE_DEPRECATED
196 /* Macros for data alignment. */
197 #if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
199 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Type-Attributes.html */
200 #define PIPE_ALIGN_TYPE(_alignment, _type) _type __attribute__((aligned(_alignment)))
202 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Variable-Attributes.html */
203 #define PIPE_ALIGN_VAR(_alignment) __attribute__((aligned(_alignment)))
205 #if (__GNUC__ > 4 || (__GNUC__ == 4 &&__GNUC_MINOR__>1)) && !defined(PIPE_ARCH_X86_64)
206 #define PIPE_ALIGN_STACK __attribute__((force_align_arg_pointer))
208 #define PIPE_ALIGN_STACK
211 #elif defined(_MSC_VER)
213 /* See http://msdn.microsoft.com/en-us/library/83ythb65.aspx */
214 #define PIPE_ALIGN_TYPE(_alignment, _type) __declspec(align(_alignment)) _type
215 #define PIPE_ALIGN_VAR(_alignment) __declspec(align(_alignment))
217 #define PIPE_ALIGN_STACK
221 #define PIPE_ALIGN_TYPE(_alignment, _type) _type
222 #define PIPE_ALIGN_VAR(_alignment)
224 #define PIPE_ALIGN_STACK
228 #error "Unsupported compiler"
233 #if defined(__GNUC__)
235 #define PIPE_READ_WRITE_BARRIER() __asm__("":::"memory")
237 #elif defined(_MSC_VER)
239 void _ReadWriteBarrier(void);
240 #pragma intrinsic(_ReadWriteBarrier)
241 #define PIPE_READ_WRITE_BARRIER() _ReadWriteBarrier()
245 #warning "Unsupported compiler"
246 #define PIPE_READ_WRITE_BARRIER() /* */
251 /* You should use these macros to mark if blocks where the if condition
252 * is either likely to be true, or unlikely to be true.
254 * This will inform human readers of this fact, and will also inform
255 * the compiler, who will in turn inform the CPU.
257 * CPUs often start executing code inside the if or the else blocks
258 * without knowing whether the condition is true or not, and will have
259 * to throw the work away if they find out later they executed the
260 * wrong part of the if.
262 * If these macros are used, the CPU is more likely to correctly predict
263 * the right path, and will avoid speculatively executing the wrong branch,
264 * thus not throwing away work, resulting in better performance.
266 * In light of this, it is also a good idea to mark as "likely" a path
267 * which is not necessarily always more likely, but that will benefit much
268 * more from performance improvements since it is already much faster than
269 * the other path, or viceversa with "unlikely".
272 * if(unlikely(do_we_need_a_software_fallback()))
273 * do_software_fallback();
277 * The macros follow the Linux kernel convention, and more examples can
280 * Note that profile guided optimization can offer better results, but
281 * needs an appropriate coverage suite and does not inform human readers.
284 #define likely(x) __builtin_expect(!!(x), 1)
285 #define unlikely(x) __builtin_expect(!!(x), 0)
287 #define likely(x) !!(x)
288 #define unlikely(x) !!(x)
292 #if defined(__cplusplus)
297 #endif /* P_COMPILER_H */