X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=cfg%2Fmacros.h;h=45f0a1edfa91ba8b644d2ce34b7eb826ad6a4b33;hb=c2fdd9fdabea8688dfe7d841c53b842a1ebe8a35;hp=ba7b561dd114f576de3252e8c530e95c508bb99c;hpb=44337a63871a837011198d3708a2f1f36370a67e;p=bertos.git

diff --git a/cfg/macros.h b/cfg/macros.h
index ba7b561d..45f0a1ed 100755
--- a/cfg/macros.h
+++ b/cfg/macros.h
@@ -14,6 +14,9 @@
 
 /*#*
  *#* $Log$
+ *#* Revision 1.11  2007/02/06 15:22:12  asterix
+ *#* Add ROTL and ROTR macros for bit rotating.
+ *#*
  *#* Revision 1.10  2006/09/13 18:31:37  bernie
  *#* BV8(), BV16(), BV32(): New macros for CPUs with small word size; SWAP_T(): New macro to support old compilers.
  *#*
@@ -339,5 +342,13 @@
 
 #endif /* COMPILER_VARIADIC_MACROS */
 
+/**
+ * Macro for rotating bit left or right.
+ * \{
+ */
+#define ROTR(var, rot) (((var) >> (rot)) | ((var) << ((sizeof(var) * 8) - (rot))))
+#define ROTL(var, rot) (((var) << (rot)) | ((var) >> ((sizeof(var) * 8) - (rot))))
+/*\}*/
+
 #endif /* MACROS_H */