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author | Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> | 2015-02-12 18:31:40 +0100 |
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committer | Eric Anholt <eric@anholt.net> | 2015-02-24 12:20:59 +0000 |
commit | 984f3069370cd4a347cb38269d430b428385affd (patch) | |
tree | 9d970f357b7d6007702050f9c9e021280061c7e9 /src/gallium/include/pipe/p_compiler.h | |
parent | 9913ce14e7fc8d67fb58e175b7efac10ded152a9 (diff) | |
download | external_mesa3d-984f3069370cd4a347cb38269d430b428385affd.zip external_mesa3d-984f3069370cd4a347cb38269d430b428385affd.tar.gz external_mesa3d-984f3069370cd4a347cb38269d430b428385affd.tar.bz2 |
gallium: include util/macros.h
The most common macros are defined there, no use to duplicate these
Clean up the already redefinded macros
Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'src/gallium/include/pipe/p_compiler.h')
-rw-r--r-- | src/gallium/include/pipe/p_compiler.h | 57 |
1 files changed, 2 insertions, 55 deletions
diff --git a/src/gallium/include/pipe/p_compiler.h b/src/gallium/include/pipe/p_compiler.h index fb018bf..cc4f444 100644 --- a/src/gallium/include/pipe/p_compiler.h +++ b/src/gallium/include/pipe/p_compiler.h @@ -33,6 +33,8 @@ #include "p_config.h" +#include "util/macros.h" + #include <stdlib.h> #include <string.h> #include <stddef.h> @@ -204,61 +206,6 @@ void _ReadWriteBarrier(void); #endif - -/* You should use these macros to mark if blocks where the if condition - * is either likely to be true, or unlikely to be true. - * - * This will inform human readers of this fact, and will also inform - * the compiler, who will in turn inform the CPU. - * - * CPUs often start executing code inside the if or the else blocks - * without knowing whether the condition is true or not, and will have - * to throw the work away if they find out later they executed the - * wrong part of the if. - * - * If these macros are used, the CPU is more likely to correctly predict - * the right path, and will avoid speculatively executing the wrong branch, - * thus not throwing away work, resulting in better performance. - * - * In light of this, it is also a good idea to mark as "likely" a path - * which is not necessarily always more likely, but that will benefit much - * more from performance improvements since it is already much faster than - * the other path, or viceversa with "unlikely". - * - * Example usage: - * if(unlikely(do_we_need_a_software_fallback())) - * do_software_fallback(); - * else - * render_with_gpu(); - * - * The macros follow the Linux kernel convention, and more examples can - * be found there. - * - * Note that profile guided optimization can offer better results, but - * needs an appropriate coverage suite and does not inform human readers. - */ -#ifndef likely -# if defined(__GNUC__) -# define likely(x) __builtin_expect(!!(x), 1) -# define unlikely(x) __builtin_expect(!!(x), 0) -# else -# define likely(x) (x) -# define unlikely(x) (x) -# endif -#endif - - -/** - * Static (compile-time) assertion. - * Basically, use COND to dimension an array. If COND is false/zero the - * array size will be -1 and we'll get a compilation error. - */ -#define STATIC_ASSERT(COND) \ - do { \ - (void) sizeof(char [1 - 2*!(COND)]); \ - } while (0) - - #if defined(__cplusplus) } #endif |