> How much processor cycles get this instruction:
>
>             addwf      PCL,F       ; W + PCL -> PCL
>
>
> In documentation is said that addwf take only 1 processor cycles
> but it change the PCL and in datasheet it said in this case it take
> 2 cycles.

In general a ADDWF takes one cycle.  However, whenever the PC is changed
the prefetched instruction must be flushed, which wastes one cycle.
Therefore, ADDWF to PCL takes two cycles, but ADDWF to anything else takes
just one cycle.


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