7d1f1a3175
Implement MOVE [to/from] [CCR/SR].
2022-05-22 19:45:22 -04:00
4e34727195
Fully implement TAS.
2022-05-22 16:14:03 -04:00
1dd6ed6ae3
Implement TAS Dn, with detour for other TASes.
2022-05-22 16:08:30 -04:00
3b68b9a83b
Implement PEA.
2022-05-22 11:27:38 -04:00
4279ce87ea
Implement LEA.
2022-05-22 08:29:12 -04:00
3c1c4f89e9
Add MULU/S functionality, though not timing.
2022-05-22 08:02:32 -04:00
4a6512f5d5
Reduce dispatch boilerplate.
2022-05-22 07:39:16 -04:00
284f23c6ea
Implement JMP.
2022-05-22 07:16:38 -04:00
11a9a5c126
Use common macros for the two forms of Perform.
2022-05-22 07:08:14 -04:00
4993801741
Add missing prefetch to BSET, BCHG, BCLR.
2022-05-21 21:05:05 -04:00
4b35899a12
Bcc: properly establish offset.
2022-05-21 20:59:34 -04:00
1304e930eb
DBcc is two-operand.
2022-05-21 20:06:03 -04:00
94288d5a94
Excludes DBcc from standard operand fetch.
2022-05-21 19:53:28 -04:00
3811ab1b82
Fix the two 8bit-with-displacement effective address Calc steps.
2022-05-21 16:20:01 -04:00
f97d2a0eb9
Add DIVU/DIVS, at least as far as getting the correct numeric result.
2022-05-21 15:56:09 -04:00
2258434326
Ensure proper return addresses are calculated for JSR.
2022-05-21 14:28:44 -04:00
e46a3c4046
Implement JSR.
2022-05-21 10:29:36 -04:00
0e4cfde657
Fix MOVEM predec.
2022-05-21 08:17:39 -04:00
4bd9c36922
Fix postincrement mode.
2022-05-20 21:01:23 -04:00
256da43fe5
Fix MOVEM other than postinc and predec.
2022-05-20 20:47:54 -04:00
a818650027
Add a faulty attempt at MOVEM.
2022-05-20 18:48:19 -04:00
9d79e64f5c
Add a mere calculate effective address pathway.
...
Plus a lot of waffle to try to justify the further code duplication.
2022-05-20 16:23:52 -04:00
ee942c5c17
Fix PC-relative fetches.
2022-05-20 14:42:51 -04:00
d157819c49
Implement the various to-[SR/CCR] actions, which do a 'repeat' prefetch.
...
(which isn't exactly a repeat, at least in the SR cases, because the function code might have changed)
2022-05-20 14:29:14 -04:00
2d91fb5441
Implement MOVEP.
2022-05-20 14:22:32 -04:00
81431a5453
Attempt BTST, BCHG, BCLR and BSET.
2022-05-20 12:58:45 -04:00
b4978d1452
Implement BSR, adding one more test file to the working set.
2022-05-20 12:40:35 -04:00
45e9648b8c
Implement Bcc.
2022-05-20 12:04:43 -04:00
4327af3760
DBcc: add write-back.
2022-05-20 11:37:18 -04:00
860cc63e21
Attempt DBcc.
2022-05-20 11:32:06 -04:00
452dd3ccfd
Add a performer call-out for Scc; use it to implement proper timing in the mk2 68000.
2022-05-20 11:20:23 -04:00
e5c1621382
Add missing fallthrough, patterns for all ADDs and SUBs.
2022-05-20 07:02:02 -04:00
1ee9c585ca
Fix segue into second operand.
2022-05-19 19:38:42 -04:00
efe5a5ac26
Signal will_perform even for invalid instructions.
2022-05-19 18:50:43 -04:00
334e3ec529
Add privilege and instruction error exceptions; permit two operands to be stored.
2022-05-19 16:55:16 -04:00
282c4121d6
CLR also follows the NEGX/NEG/NOT pattern.
2022-05-19 16:30:08 -04:00
6c2eee0e44
Implement CHK, and therefore the standard exception pattern.
2022-05-19 16:27:39 -04:00
eeb6a088b8
Add a tag to avoid duplication.
2022-05-19 15:49:42 -04:00
22b63fe1f8
Add EXT, and notes to self.
2022-05-19 15:41:02 -04:00
7ef526e2d3
Fix destination decrement.
2022-05-19 15:22:59 -04:00
ce7f94559b
Add EXG, ABCD, SBCD.
2022-05-19 15:19:00 -04:00
0471decfc8
Implement the complete set of fetch addressing modes.
...
Subject to observations: (1) MOVE uses slightly custom versions of many of these for its stores; and (2) PEA and LEA need to do the calculation but not the read, so some of this will be duplicated further. It's either that or include greater conditionality on the path.
2022-05-19 15:03:22 -04:00
084d6ca11d
Simplify address handling; add perform patterns for CMP, AND, OR, EOR.
2022-05-19 12:18:47 -04:00
274902c3c1
Add to-memory write-back. Am going to reconsider usage of temporary_address_ as noted.
2022-05-19 11:23:26 -04:00
f46e7c65c5
Add AddressRegisterIndirect fetches.
2022-05-19 10:47:57 -04:00
c6c6213460
Bifurcate the fetch-operand flow.
...
Address calculation will be the same, but the fetch will differ. I don't think there's a neat costless way to factor out the address calculations, alas, but I'll see whether macros can save the day.
2022-05-19 10:27:51 -04:00
1b87626b82
Move some way towards MOVE.
2022-05-18 21:00:10 -04:00
da9fb216b1
Remove setup_operation in favour of doing the equivalent inline.
...
... as it'll probably allow me a route to `goto` straight out of there, too. At least, if I can find a sufficiently neat macro formulation.
2022-05-18 16:45:40 -04:00
bef12f3d65
Move ExecutionState into Implementation.hpp; use goto to avoid some double switches.
...
Re: the latter, yuck. Yuck yuck yuck. But it does mean I can stop going back and forth on how to structure conditionality on effective address generation segueing into fetches without doubling up on tests.
2022-05-18 15:35:38 -04:00
aa9e7eb7a2
Codify MOVE's status somewhat, avoid reading write-only operands.
2022-05-17 16:57:33 -04:00
Thomas Harte