280 Commits

Author	SHA1	Message	Date
Thomas Harte	6aabc5e7b0	Test LEA, PEA, add name for MOVEq.	2022-04-19 19:45:51 -04:00
Thomas Harte	343a8e0192	Resolve wrong-headed mapping of LEA to MOVEAl.	2022-04-19 19:36:21 -04:00
Thomas Harte	ef87d09cfa	Clear up MOVEs, fail on MOVEAs.	2022-04-19 17:13:23 -04:00
Thomas Harte	d21c67f237	Don't permit byte move from address register.	2022-04-19 16:49:26 -04:00
Thomas Harte	de40fed248	Test MOVEs and add operand validation.	2022-04-19 16:31:03 -04:00
Thomas Harte	76d7e0e1f8	Test and correct SUBs.	2022-04-19 16:27:20 -04:00
Thomas Harte	1f585d67b6	ADDA: correct decoding, add validation.	2022-04-19 14:43:01 -04:00
Thomas Harte	5b22e94a4b	Map invalid reg+mode combinations to AddressingMode::None; add validation of ADDs and decoding of ADDX.	2022-04-19 14:36:36 -04:00
Thomas Harte	7749aef6b6	Improve const correctness.	2022-04-19 14:35:40 -04:00
Thomas Harte	5de8fb0d08	Disallow four illegal NBCD addressing modes.	2022-04-19 09:59:02 -04:00
Thomas Harte	19f7335926	Add post validation step.	2022-04-19 09:44:02 -04:00
Thomas Harte	99f4cd867d	Decode the two EXTs.	2022-04-19 08:42:17 -04:00
Thomas Harte	93fe3459fd	The quick value won't always fit in reg; turf the problem elsewhere.	2022-04-19 08:37:35 -04:00
Thomas Harte	1abd3bd7f3	Decode SWAP.	2022-04-19 08:37:13 -04:00
Thomas Harte	fc4fd41be4	Reorder from most specific to least.	2022-04-19 08:00:52 -04:00
Thomas Harte	e4c6251ef5	Express the BSR/Bcc.l test properly.	2022-04-18 14:42:31 -04:00
Thomas Harte	7aa250eaf7	Advances to hitting the same absent/present mapping as the old decoder.	2022-04-18 14:41:26 -04:00
Thomas Harte	ff380b686a	Decode MOVEq.	2022-04-18 09:12:45 -04:00
Thomas Harte	d2452f4b68	Fix SUBQ ExtendedOperation mappings.	2022-04-18 09:08:49 -04:00
Thomas Harte	deb9c32a38	Add missing Sccs.	2022-04-18 09:04:17 -04:00
Thomas Harte	440f45b996	Attempt decoding and disambiguation of Scc, DBcc, Bcc and BSR.	2022-04-18 08:55:46 -04:00
Thomas Harte	7d64c4ec66	Add STOP.	2022-04-18 08:29:10 -04:00
Thomas Harte	7fe0d530c1	Add a decoder for TRAP.	2022-04-18 08:05:33 -04:00
Thomas Harte	c944767554	Better document decoding patterns, add LEA and CHK.	2022-04-18 08:00:43 -04:00
Thomas Harte	fde5a1c507	Ensure ADDI, SUBI, etc, provide an operation.	2022-04-18 07:42:30 -04:00
Thomas Harte	1991ed0804	Introduce failing [partial-]test of new 68000 decoder.	2022-04-18 07:23:25 -04:00
Thomas Harte	4eb752b000	Even out tabs.	2022-04-15 20:41:39 -04:00
Thomas Harte	bfb29a58f3	Take another crack at neatness; make LEA overt.	2022-04-15 20:33:59 -04:00
Thomas Harte	f86e455a87	Advance permissively through the 4xxx page to LEA.	2022-04-15 16:01:33 -04:00
Thomas Harte	faa35fe9fc	Decode MOVE and the fixed 0x4xxx set.	2022-04-15 15:40:31 -04:00
Thomas Harte	89b8b59658	Ostensibly completes the 0 line.	2022-04-15 15:33:54 -04:00
Thomas Harte	de55a1adc4	Require a model for decoding; shift a bunch of immediates into ExtendedOperation.	2022-04-15 09:40:37 -04:00
Thomas Harte	d1613025ee	For now, assume the .q actions can be handled inside Preinstruction.	2022-04-13 09:29:12 -04:00
Thomas Harte	cc4431c409	Expand decode to accept a wider array of operations, and then funnel them down.	2022-04-12 16:17:30 -04:00
Thomas Harte	3d5986c55d	Some minor style changes, plus I think I've talked myself into an expanded Operation-tracking enum. Probably.	2022-04-12 14:54:11 -04:00
Thomas Harte	9aeb6ee532	Formally prepare for one- and two-operand instructions.	2022-04-12 09:14:46 -04:00
Thomas Harte	e7f6cc598d	Make first attempt to complete broad phase of decoding.	2022-04-12 09:08:46 -04:00
Thomas Harte	cd465dd121	Decode page E.	2022-04-12 09:04:40 -04:00
Thomas Harte	174b48a14a	Populate lines 9 and D.	2022-04-12 08:57:40 -04:00
Thomas Harte	bca18e7aba	Fill in line decoders for 5, 6 and 7. ... This leaves 9, D and E to go.	2022-04-12 08:44:32 -04:00
Thomas Harte	17e761d6c6	Add enough code to pages 0–3 to shift problem to decode().	2022-04-12 08:36:44 -04:00
Thomas Harte	c50556dde4	Create empty line decoders.	2022-04-12 08:16:29 -04:00
Thomas Harte	dd5bdd67d7	Add B page and a large chunk of 4.	2022-04-12 07:49:08 -04:00
Thomas Harte	21ac9363e9	Add page 8.	2022-04-11 16:32:57 -04:00
Thomas Harte	8e3cccf4d6	Begins a formalised 68k decoder.	2022-04-11 15:00:55 -04:00
Thomas Harte	bb5cf570e5	Remove conditional, make generic enough for both 32- and 64-bit operation.	2022-04-10 15:18:23 -04:00
Thomas Harte	7002d6d306	Improve accuracy of comment.	2022-04-10 09:37:18 -04:00
Thomas Harte	1b8d8f3a04	Default to 32-bit versions.	2022-04-10 09:35:58 -04:00
Thomas Harte	284440336d	Correct rotate_mask().	2022-04-10 09:31:39 -04:00
Thomas Harte	140ae7a513	Clarify template parameters.	2022-04-10 08:57:09 -04:00