diff options
| author | Mike Pavone <pavone@retrodev.com> | 2012-10-29 01:18:38 -0700 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2012-10-29 01:18:38 -0700 |
| commit | 7c49618ca54c5178f7a3f5db21eaff3bf16e58b7 (patch) | |
| tree | 2e66736eebeb6ed359296c159e6ecf23a079cd4a /fib.s68 | |
Initial work on M68K instruction decoding
Diffstat (limited to 'fib.s68')
| -rw-r--r-- | fib.s68 | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -0,0 +1,21 @@ + lea 0, a7 + moveq #10, d0 + bsr fib + illegal +fib: + cmp #2, d0 + blt base + subq #1, d0 + move.l d0, -(a7) + bsr fib + move.l (a7), d1 + exg d0, d1 + move.l d1, (a7) + subq #1, d0 + bsr fib + move.l (a7)+, d1 + add.l d1, d0 + rts +base: + moveq #1, d0 + rts |