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Forum: Coders. Tutorials 14 December 2018, 18:08
Replies: 111
Views: 29,686
Posted By Leffmann
D0-D1/A0-A1 are scratch registers, this has...

D0-D1/A0-A1 are scratch registers, this has always been the case for system calls.
Forum: Coders. Tutorials 08 December 2018, 00:37
Replies: 111
Views: 29,686
Posted By Leffmann
moveq #-1, d0 .1 tst.b (a0)+ dbeq ...

moveq #-1, d0
.1 tst.b (a0)+
dbeq d0, .1
add.l d0, a0
not.l d0

But isn't Bcc faster than DBcc?

move.l a0, d0
.1 tst.b (a0)+
Forum: Coders. Tutorials 24 November 2018, 19:28
Replies: 111
Views: 29,686
Posted By Leffmann
Add basereg tab,A6 above your code and it will...

Add basereg tab,A6 above your code and it will convert to 16-bit offsets.

With a bit more work you can also get absolute references like move.w stuff,D0 automatically optimized into move.w...
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