Thomas Harte
ee3a3df0b5
Eliminate SBCD macro.
2022-10-17 15:12:38 -04:00
Thomas Harte
aff1caed15
Clean up formatting.
2022-10-17 15:05:23 -04:00
Thomas Harte
da03cd58c1
Add overt casting.
2022-10-17 15:04:28 -04:00
Thomas Harte
ce98ca4bdd
Pull RO[L/R][X]m out of their macro stupor.
2022-10-17 11:27:04 -04:00
Thomas Harte
cc55f0586d
Clean up ASL/ASR/LSL/LSRm.
2022-10-17 11:18:10 -04:00
Thomas Harte
47e8f3c0f1
Collapse [A/L]S[L/R].[bwl] into a template.
2022-10-16 22:21:20 -04:00
Thomas Harte
d5ceb934d2
Fix overflow flags, avoid bigger-word usage.
2022-10-16 21:52:00 -04:00
Thomas Harte
17c1e51231
Commute ROL/ROR to templates.
2022-10-16 12:19:09 -04:00
Thomas Harte
fee072b404
Commute ROXL and ROXR into a template.
2022-10-16 12:06:28 -04:00
Thomas Harte
0a9c392371
Remove unused bit_count
.
2022-10-13 15:01:06 -04:00
Thomas Harte
06dbb7167b
Unify TST.
2022-10-11 21:31:14 -04:00
Thomas Harte
eff9a09b9f
Collapse MOVE and NEG[X] similarities.
2022-10-11 21:27:18 -04:00
Thomas Harte
1f19141746
Eliminate BiggerInt
.
2022-10-11 16:19:47 -04:00
Thomas Harte
28093196b9
Convert DIVU/DIVS logic to a template.
2022-10-11 16:16:53 -04:00
Thomas Harte
eb206a08d9
Templatise MULU/MULS.
2022-10-11 16:02:20 -04:00
Thomas Harte
b2f005da1b
Collapse SR/CCR bitwise operations into a template.
2022-10-11 15:53:11 -04:00
Thomas Harte
8305a3b46a
Consolidate compare logic.
2022-10-11 12:57:02 -04:00
Thomas Harte
f3f23f90a3
Consolidate repetition in CLR.
2022-10-11 11:22:34 -04:00
Thomas Harte
77bc60bf86
Consolidate BCLR, BCHG and BSET into a macro.
2022-10-11 10:47:55 -04:00
Thomas Harte
ec5d57fefe
Eliminate 64-bit work.
2022-10-11 10:33:28 -04:00
Thomas Harte
58396f0c52
Perform a prima facie conversion of ADD/SUB[/X] from macros to templates.
2022-10-10 22:21:13 -04:00
Thomas Harte
02b6ea6c46
Factor out would-accept-interrupt test, per uncertainty re: level 7.
2022-06-03 08:31:56 -04:00
Thomas Harte
c3b436fe96
Use int64_t
as an intermediary to avoid x86 exception on INT_MIN/-1.
2022-06-02 21:39:52 -04:00
Thomas Harte
659e4f6987
Include fixed cost of rolls. Which includes providing slightly more information to did_shift
.
2022-06-01 20:30:51 -04:00
Thomas Harte
8ffaf1a8e4
Ensure did_divu/s are performed even upon divide by zero.
2022-05-29 21:18:19 -04:00
Thomas Harte
7788a109b0
Tweak more overtly to avoid divide by zero.
2022-05-29 20:51:50 -04:00
Thomas Harte
c97245e626
Fix CalcEA timing; make MOVEfromSR a read-modify-write.
2022-05-27 10:32:28 -04:00
Thomas Harte
9e3c2b68d7
Eliminate potential future implicit conversion warnings.
2022-05-24 11:05:24 -04:00
Thomas Harte
6a442e0136
MOVEM has an immediate first operand.
2022-05-20 20:34:51 -04:00
Thomas Harte
cb77519af8
Make BSR operate like the other offsets: the flow controller gets whatever was in the opcode.
2022-05-20 12:40:09 -04:00
Thomas Harte
ba8592ceae
At least on the 68000, Scc is read-modify-write.
2022-05-20 11:43:26 -04:00
Thomas Harte
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
Thomas Harte
eeb6a088b8
Add a tag to avoid duplication.
2022-05-19 15:49:42 -04:00
Thomas Harte
e4c0a89889
Just use the four-bit register number directly.
2022-05-19 15:01:09 -04:00
Thomas Harte
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
Thomas Harte
3db2de7478
Works 68000 mk2 into the comparative tests.
...
... revealing that I've leant a little too hard on __LINE__.
2022-05-16 20:04:13 -04:00
Thomas Harte
acb63a1307
Pull generalised DIVU/DIVS into a macro.
2022-05-15 20:01:51 -04:00
Thomas Harte
341bf2e480
Repattern DIVS after DIVU.
2022-05-15 16:54:58 -04:00
Thomas Harte
ff8e4754d7
Ensure STOP exits the run loop.
2022-05-14 19:17:32 -04:00
Thomas Harte
27c4d19455
Support STOP.
2022-05-14 11:35:35 -04:00
Thomas Harte
f83954f5b7
Switch to common bit-selection logic.
2022-05-13 15:08:15 -04:00
Thomas Harte
77b56c50e6
Ensure you can't trace into divide-by-zero, etc.
2022-05-13 14:02:56 -04:00
Thomas Harte
002a8c061f
Trim the public interface of Executor
.
2022-05-13 13:55:37 -04:00
Thomas Harte
4299334e24
Clean up some TODOs, eliminate one further conditional.
2022-05-13 11:17:57 -04:00
Thomas Harte
4d03c73222
Ensure that the first instruction of privilege/line1010/etc exceptions isn't traced.
2022-05-13 11:08:22 -04:00
Thomas Harte
6c854e8ecc
Simplify is_supervisor
semantics.
2022-05-13 07:53:40 -04:00
Thomas Harte
2e796f31d4
Support interrupts; documentation to come.
2022-05-12 20:52:24 -04:00
Thomas Harte
6d43576db7
Remove errant semicolon.
2022-05-12 16:21:36 -04:00
Thomas Harte
b7d1bff0c7
Eliminate branches from ABCD.
2022-05-12 15:25:01 -04:00
Thomas Harte
79c5af755f
Eliminate branches from SBCD.
2022-05-12 15:18:03 -04:00