|Re: [hatari-devel] Hatari profiler updates and CPU cycle questions|
[ Thread Index |
| More lists.tuxfamily.org/hatari-devel Archives
Jan 30, 2013 07:51:09 AM, hatari-devel@xxxxxxxxxxxxxxxxxxx wrote:
> Now I'd like to know, is it possible for an instruction to use 0 cycles,
> like CPU cycle counter value difference would indicate for subq here:
> - Eero
I don't think so. However, two things come to mind.
1) Maybe the instruction was interrupted by an exception.
2) dBxx to itself will decrement a register without continuously fetching itself (IIRC).