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 **************************************************************************/
40 #if defined(_WIN32) && !defined(__WIN32__)
46 /* Avoid 'expression is always true' warning */
47 #pragma warning(disable: 4296)
53 * Alternative stdint.h and stdbool.h headers are supplied in include/c99 for
54 * systems that lack it.
56 #ifndef __STDC_LIMIT_MACROS
57 #define __STDC_LIMIT_MACROS 1
63 #if !defined(__HAIKU__) && !defined(__USE_MISC)
64 typedef unsigned int uint
;
65 typedef unsigned short ushort
;
67 typedef unsigned char ubyte
;
69 typedef unsigned char boolean
;
77 /* Function inlining */
80 # define INLINE inline
81 # elif defined(__GNUC__)
82 # define INLINE __inline__
83 # elif defined(_MSC_VER)
84 # define INLINE __inline
86 # define INLINE __inline
87 # elif defined(__INTEL_COMPILER)
88 # define INLINE inline
89 # elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
90 # define INLINE __inline
91 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
92 # define INLINE inline
93 # elif (__STDC_VERSION__ >= 199901L) /* C99 */
94 # define INLINE inline
101 /* Function visibility */
103 # if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
104 # define PUBLIC __attribute__((visibility("default")))
105 # elif defined(_MSC_VER)
106 # define PUBLIC __declspec(dllexport)
113 /* The __FUNCTION__ gcc variable is generally only used for debugging.
114 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
117 # if !defined(__GNUC__)
118 # if (__STDC_VERSION__ >= 199901L) /* C99 */ || \
119 (defined(__SUNPRO_C) && defined(__C99FEATURES__))
120 # define __FUNCTION__ __func__
122 # define __FUNCTION__ "<unknown>"
125 # if defined(_MSC_VER) && _MSC_VER < 1300
126 # define __FUNCTION__ "<unknown>"
132 /* This should match linux gcc cdecl semantics everywhere, so that we
133 * just codegen one calling convention on all platforms.
136 #define PIPE_CDECL __cdecl
143 #if defined(__GNUC__)
144 #define PIPE_DEPRECATED __attribute__((__deprecated__))
146 #define PIPE_DEPRECATED
151 /* Macros for data alignment. */
152 #if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
154 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Type-Attributes.html */
155 #define PIPE_ALIGN_TYPE(_alignment, _type) _type __attribute__((aligned(_alignment)))
157 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Variable-Attributes.html */
158 #define PIPE_ALIGN_VAR(_alignment) __attribute__((aligned(_alignment)))
160 #if (__GNUC__ > 4 || (__GNUC__ == 4 &&__GNUC_MINOR__>1)) && !defined(PIPE_ARCH_X86_64)
161 #define PIPE_ALIGN_STACK __attribute__((force_align_arg_pointer))
163 #define PIPE_ALIGN_STACK
166 #elif defined(_MSC_VER)
168 /* See http://msdn.microsoft.com/en-us/library/83ythb65.aspx */
169 #define PIPE_ALIGN_TYPE(_alignment, _type) __declspec(align(_alignment)) _type
170 #define PIPE_ALIGN_VAR(_alignment) __declspec(align(_alignment))
172 #define PIPE_ALIGN_STACK
176 #define PIPE_ALIGN_TYPE(_alignment, _type) _type
177 #define PIPE_ALIGN_VAR(_alignment)
179 #define PIPE_ALIGN_STACK
183 #error "Unsupported compiler"
187 /* You should use these macros to mark if blocks where the if condition
188 * is either likely to be true, or unlikely to be true.
190 * This will inform human readers of this fact, and will also inform
191 * the compiler, who will in turn inform the CPU.
193 * CPUs often start executing code inside the if or the else blocks
194 * without knowing whether the condition is true or not, and will have
195 * to throw the work away if they find out later they executed the
196 * wrong part of the if.
198 * If these macros are used, the CPU is more likely to correctly predict
199 * the right path, and will avoid speculatively executing the wrong branch,
200 * thus not throwing away work, resulting in better performance.
202 * In light of this, it is also a good idea to mark as "likely" a path
203 * which is not necessarily always more likely, but that will benefit much
204 * more from performance improvements since it is already much faster than
205 * the other path, or viceversa with "unlikely".
208 * if(unlikely(do_we_need_a_software_fallback()))
209 * do_software_fallback();
213 * The macros follow the Linux kernel convention, and more examples can
216 * Note that profile guided optimization can offer better results, but
217 * needs an appropriate coverage suite and does not inform human readers.
220 #define likely(x) __builtin_expect(!!(x), 1)
221 #define unlikely(x) __builtin_expect(!!(x), 0)
223 #define likely(x) !!(x)
224 #define unlikely(x) !!(x)
227 #endif /* P_COMPILER_H */