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  1. #ifdef __dietlibc__
  2. #include <sys/cdefs.h>
  3. #else
  4. #if __GNUC__ < 3
  5. #define __expect(foo,bar) (foo)
  6. #else
  7. #define __expect(foo,bar) __builtin_expect((long)(foo),bar)
  8. #endif
  9. #define __likely(foo) __expect((foo),1)
  10. #define __unlikely(foo) __expect((foo),0)
  11. #endif