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Forum: Coders. Tutorials 07 December 2018, 10:48
Replies: 111
Views: 29,680
Posted By chb
Hmm, according to the 68020 manual ROR/ROL is...

Hmm, according to the 68020 manual ROR/ROL is 5/8/8 cycles (best case/cache case/worst case), a SWAP is 1/4/4, so still quite a bit faster. The rotate operations seem to be considerably slower than...
Forum: Coders. Tutorials 07 December 2018, 10:14
Replies: 111
Views: 29,680
Posted By chb
ROL #8,D0 is 22 cycles (6 + 2n). There's a lot...

ROL #8,D0 is 22 cycles (6 + 2n).
There's a lot of routines for byte swapping that are faster than ROL, if you want to work directly in memory:
http://atari-forum.com/viewtopic.php?f=68&t=11779 ...
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