Hi!

I usually write code with C programming language, but this time I need to explore a .lst output to solve a problem.

Maybe it is a silly question... but I don't have strong experience with assembly code.

I'm using a H8S 2378 microcontroller.

I need some help about this very short code fragment:

                            
MOV.B       R0L,R0L
MOV.B       R0L,R4L
MOV.B       R4L,R4L
BNE           address....

The instruction MOV.B R0L,R4L seems to be clear: the value in the 8-bit register R0L is transferred into R4L

But I don't understand the benefit of the other two MOV instructions (with source equal to destination) and the subsequent branch if not equal.

There is a lot of instructions like this in the .lst file.

Could you help me?

Thanks.

Marco