Commit Graph

23 Commits

Author SHA1 Message Date
Justin Chadwick 51b26f3397 Remove AtBreakpoint() from ReadIdle. Fixes Rogue Squadron 2 without
Breaking Gladius
2014-12-27 19:16:50 -05:00
skidau ca3e5ce5e1 Added an exception check when the game is close to overflowing. Fixes the fifo overflow that occurs in Battalion Wars 2.
Changed the CPEnd loop check to an exact match.
2014-11-19 12:48:09 +11:00
skidau 3d448e49c6 Update CPStatus before processing the FIFO events and force an exception check on interrupts.
Added more information into the FIFO unknown opcode error message.
2014-11-19 12:48:08 +11:00
skidau b2c02e216c Separated out the CPU and GPU thread path to avoid clobbering.
Removed the Eternal Darkness check as it is no longer required.

Fixes issue 7835.
2014-11-19 12:48:08 +11:00
comex 2eebdff01b Remove useless STACKALIGN macro.
It only ever did anything on 32-bit OS X.

Anyway, it wasn't even on the right functions, and these days
ABI_PushRegistersAndAdjustStack should handle maintaining the ABI
correctly.
2014-09-30 01:42:47 -04:00
skidau 007ba13cfa Merge pull request #1144 from skidau/fifo-linked
Moved the linking of the FIFO CPWritePointer near where CPWritePointer gets updated
2014-09-29 13:52:33 +10:00
comex 65af90669b Add the 'desynced GPU thread' mode.
It's a relatively big commit (less big with -w), but it's hard to test
any of this separately...

The basic problem is that in netplay or movies, the state of the CPU
must be deterministic, including when the game receives notification
that the GPU has processed FIFO data.  Dual core mode notifies the game
whenever the GPU thread actually gets around to doing the work, so it
isn't deterministic.  Single core mode is because it notifies the game
'instantly' (after processing the data synchronously), but it's too slow
for many systems and games.

My old dc-netplay branch worked as follows: everything worked as normal
except the state of the CP registers was a lie, and the CPU thread only
delivered results when idle detection triggered (waiting for the GPU if
they weren't ready at that point).  Usually, a game is idle iff all the
work for the frame has been done, except for a small amount of work
depending on the GPU result, so neither the CPU or the GPU waiting on
the other affected performance much.  However, it's possible that the
game could be waiting for some earlier interrupt, and any of several
games which, for whatever reason, never went into a detectable idle
(even when I tried to improve the detection) would never receive results
at all.  (The current method should have better compatibility, but it
also has slightly higher overhead and breaks some other things, so I
want to reimplement this, hopefully with less impact on the code, in the
future.)

With this commit, the basic idea is that the CPU thread acts as if the
work has been done instantly, like single core mode, but actually hands
it off asynchronously to the GPU thread (after backing up some data that
the game might change in memory before it's actually done).  Since the
work isn't done, any feedback from the GPU to the CPU, such as real
XFB/EFB copies (virtual are OK), EFB pokes, performance queries, etc. is
broken; but most games work with these options disabled, and there is no
need to try to detect what the CPU thread is doing.

Technically: when the flag g_use_deterministic_gpu_thread (currently
stuck on) is on, the CPU thread calls RunGpu like in single core mode.
This function synchronously copies the data from the FIFO to the
internal video buffer and updates the CP registers, interrupts, etc.
However, instead of the regular ReadDataFromFifo followed by running the
opcode decoder, it runs ReadDataFromFifoOnCPU ->
OpcodeDecoder_Preprocess, which relatively quickly scans through the
FIFO data, detects SetFinish calls etc., which are immediately fired,
and saves certain associated data from memory (e.g. display lists) in
AuxBuffers (a parallel stream to the main FIFO, which is a bit slow at
the moment), before handing the data off to the GPU thread to actually
render.  That makes up the bulk of this commit.

In various circumstances, including the aforementioned EFB pokes and
performance queries as well as swap requests (i.e. the end of a frame -
we don't want the CPU potentially pumping out frames too quickly and the
GPU falling behind*), SyncGPU is called to wait for actual completion.

The overhead mainly comes from OpcodeDecoder_Preprocess (which is,
again, synchronous), as well as the actual copying.

Currently, display lists and such are escrowed from main memory even
though they usually won't change over the course of a frame, and
textures are not even though they might, resulting in a small chance of
graphical glitches.  When the texture locking (i.e. fault on write) code
lands, I can make this all correct and maybe a little faster.

* This suggests an alternate determinism method of just delaying results
until a short time before the end of each frame.  For all I know this
might mostly work - I haven't tried it - but if any significant work
hinges on the competion of render to texture etc., the frame will be
missed.
2014-09-28 21:34:29 -04:00
skidau 8c5e12cf02 Moved the linking of the FIFO CPWritePointer near where CPWritePointer gets updated. The CPWritePointer was getting updated while it was in-flight causing Pac-man Party to flicker. Fixes issue 5223. 2014-09-22 16:49:09 +10:00
Rohit Nirmal fbc64984ca Include CommonTypes.h instead of Common.h. 2014-09-08 15:39:58 -04:00
comex 14125cf951 Refactor SetCpStatus into two functions for from-GPU and from-CPU mode rather than a boolean parameter.
This shouldn't affect functionality.  I'm not sure if the breakpoint
distinction is actually necessary (my commit messages from the old
dc-netplay last year claim that breakpoints are broken anyway, but I
don't remember why), but I don't actually need to change this part of
the code (yet), so I'll stick with the trimmings change for now.
2014-08-26 12:43:39 -04:00
Tillmann Karras 07c7e6f35e CommandProcessor: mark some functions as static 2014-08-25 21:09:42 +02:00
degasus 6d3f249dcc mark all local variables as static 2014-07-11 16:10:20 +02:00
degasus 22e1aa5bb4 mark all local functions as static 2014-07-11 16:07:23 +02:00
magumagu 0aecd9504e Video backends: remove dead code. 2014-06-01 01:56:09 -07:00
Matthew Parlane 31cfc73a09 Fixes spacing for "for", "while", "switch" and "if"
Also moved && and || to ends of lines instead of start.
Fixed misc vertical alignments and some { needed newlining.
2014-03-11 00:35:07 +13:00
Pierre Bourdon ffe588cc24 Fix more header sorting issues in VideoCommon/ (now check-includes clean). 2014-02-20 01:01:10 +01:00
Pierre Bourdon 362dec9c7c Dolphin now builds on Linux with only Source/Core as include dir 2014-02-18 12:18:47 +01:00
Lioncash 3fd87a7636 Second and final pass of clearing out tabs. 2014-02-17 02:19:41 -05:00
Lioncash 6c4ee1753a Fix some vertical alignments
ie. uses spaces for alignment.
2014-02-16 20:12:05 -05:00
Pierre Bourdon 92f8d93e96 Remove the old MMIO access "interface". 2014-02-16 19:22:40 +01:00
Pierre Bourdon 4129b30494 MMIO: Port the VideoCommon CP MMIOs to the new interface (and provide framework for other video related mappings). 2014-02-16 19:22:40 +01:00
degasus 010a0d481a VideoCommon: remove Cache Displaylist
This option was known to break every second game and only boost a bit.
It also seems to be broken because of streaming into pinned memory and buffer storage buffers.

v2: also remove dlc_desc
2014-01-31 07:30:55 +01:00
Jasper St. Pierre 34692ab826 Remove unnecessary Src/ folders 2013-12-31 14:03:19 -05:00