[hatari-devel] Little question with add cycles (same question with a move)

[Laurent Sallafranque]

OK, I had forgotten that the fetch was only 4 cycles.

something like 11(1,1,1) would take 5 + 8 + 4 + 8 (in long of course) ?

Regards
Laurent



Le 15/11/2011 23:53, Miro Kropác(ek a écrit :
>
>     Sorry, I don't understand the non cache part for ADD.L (An),Dn.
>
>
>     0 0 2(0/0/0) 2(0/1/0) (add)
>     1 1 3(1/0/0) 3(1/0/0) (fea)
>     ------------------------------
>     1 1 5(1/0/0) 5(1/1/0)
>
>     word: 1 1 7(1/0/0) 9(1/1/0)
>     long:  1 1 3+8(1/0/0) 1+8+4(1/1/0)
>
> What exactly? Originally:
>
> 5 - 2 - 2 = 1 internal cycle for execution
> Now. On the Falcon bus we fetch the instruction word and the long word 
> operand from the memory.
> Instruction word: 4 cycles
> Long word operand: 2*4 cycles
> 1 + 4 + 8, voila :)
>
> -- 
> MiKRO / Mystic Bytes
> http://mikro.atari.org
>
>
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