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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [include/] [linux/] [compiler.h] - Rev 1279
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#ifndef __LINUX_COMPILER_H #define __LINUX_COMPILER_H /* Somewhere in the middle of the GCC 2.96 development cycle, we implemented a mechanism by which the user can annotate likely branch directions and expect the blocks to be reordered appropriately. Define __builtin_expect to nothing for earlier compilers. */ #if __GNUC__ == 2 && __GNUC_MINOR__ < 96 #define __builtin_expect(x, expected_value) (x) #endif #define likely(x) __builtin_expect((x),1) #define unlikely(x) __builtin_expect((x),0) #if __GNUC__ > 3 #define __attribute_used__ __attribute((__used__)) #elif __GNUC__ == 3 #if __GNUC_MINOR__ >= 3 # define __attribute_used__ __attribute__((__used__)) #else # define __attribute_used__ __attribute__((__unused__)) #endif /* __GNUC_MINOR__ >= 3 */ #elif __GNUC__ == 2 #define __attribute_used__ __attribute__((__unused__)) #else #define __attribute_used__ /* not implemented */ #endif /* __GNUC__ */ #endif /* __LINUX_COMPILER_H */
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