I will "RL and RR" by a C instruction. How do I made ?
Look under "Intrinsic Routines" in the manual.
Look under "Intrinsic Routines" in the manual. But when it says that Intrinsic routines are included inline, instead of called as functions, that's a lie! C51 v6.x calls intrinsic functions just like any other function. Also, I've head that the _lrol_ function is not very smart nor efficient.