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view fib.s68 @ 562:e13f4fd9cf6d
Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
author | Mike Pavone <pavone@retrodev.com> |
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date | Mon, 23 Jun 2014 13:12:04 -0400 |
parents | f664eeb55cb4 |
children | 2455662378ed f7fe240a7da6 |
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dc.l $0, start start: moveq #36, d0 bsr fib illegal 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