--- SheepShaver/src/Unix/sysdeps.h	2005/11/30 07:24:53	1.50
+++ SheepShaver/src/Unix/sysdeps.h	2006/04/01 21:41:18	1.51
@@ -167,6 +167,21 @@ typedef int64 intptr;
 #endif
 
 /**
+ *		Helper macros to annotate likely branch directions
+ **/
+
+#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#define likely(x)		__builtin_expect((x),1)
+#define unlikely(x)		__builtin_expect((x),0)
+#endif
+#ifndef likely
+#define likely(x)		(x)
+#endif
+#ifndef unlikely
+#define unlikely(x)		(x)
+#endif
+
+/**
  *		Helper functions to byteswap data
  **/