Mercurial > repos > blastem
view fib.s68 @ 2021:270a4c875e0a
Backed out changeset 96971b673f51
This optimization caused a regression in Overdrive 2 due to the impact of Z80 access to the 68K bus
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 24 Nov 2020 20:23:38 -0800 |
parents | f7fe240a7da6 |
children | b7ecd0d6a77b |
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dc.l $0, start start: moveq #42, d0 bsr fib reset fib: cmp.l #2, d0 blt base subq.l #1, d0 move.l d0, -(a7) bsr fib move.l (a7), d1 exg d0, d1 move.l d1, (a7) subq.l #1, d0 bsr fib move.l (a7)+, d1 add.l d1, d0 rts base: moveq #1, d0 rts