Commit Graph

24 Commits

Author SHA1 Message Date
Pokechu22 b5fd35f951 Refactor OpcodeDecoding and FIFO analyzer to use callbacks 2021-12-18 15:21:36 -08:00
Pokechu22 3aaeb2b9ef Convert OpcodeDecoder::Opcode and OpcodeDecoder::Primitive to enum class 2021-12-18 12:51:56 -08:00
Pierre Bourdon e149ad4f0a
treewide: convert GPLv2+ license info to SPDX tags
SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.
2021-07-05 04:35:56 +02:00
Lioncash b2a9c36501 VideoCommon/OpcodeDecoding: Move g_bRecordFifoData into namespace
Keeps the global localized with the code that it's primarily related to.

Now it's obvious from a glance what the global variable is affecting.
2019-12-05 09:13:03 -05:00
Lioncash d9d069e024 OpcodeDecoding: Convert #defines into enum constants
Gets several constants out of global scope.
2017-02-08 00:05:17 -05:00
degasus 7833ff25df VideoBackends: Merge Initialize and Shutdown functions. 2016-06-26 12:34:59 +02:00
Pierre Bourdon 3570c7f03a Reformat all the things. Have fun with merge conflicts. 2016-06-24 10:43:46 +02:00
Lioncash 1df1ba55bb VideoCommon: Convert some DataReader includes into forward declarations
Gets rid of some indirect inclusions in cpp files.
Also this will reduce the amount of rebuilt files if
changes occur in the DataReader header.
2016-01-31 15:19:20 -05:00
Lioncash e187c55bdd OpcodeDecoder: Add namespace 2016-01-24 01:31:36 -05:00
Scott Mansell a355d9868e FifoRecorder: Use Video Common to record efb2ram correctly.
Texture updates have been moved into TextureCache, while
TMEM updates where moved into bpmem. Code for handling
efb2ram updates was added to TextureCache.

There was a bug for preloaded RGBA8 textures, it only copied
half the texture. The TODO was wrong too.
2015-09-22 23:59:16 +12:00
Tillmann Karras 30ebb2459e Set copyright year to when a file was created 2015-05-25 13:22:31 +02:00
Tillmann Karras cefcb0ace9 Update license headers to GPLv2+ 2015-05-25 13:22:31 +02:00
skidau cdff138c67 Show no more than one FIFO error per session. 2015-03-13 23:25:15 +11:00
degasus 21970c4a2a VideoCommon: cleanup OpcodeDecoder 2014-12-09 18:56:27 +01:00
degasus 4b22885ed8 VideoCommon: fifo cleanups 2014-12-09 18:56:27 +01:00
degasus 90613a1bda OpcodeDecoder: Skip recursiv display lists 2014-11-15 16:24:06 +01:00
comex 6e774f1b64 Add missing includes where headers depend on other headers having been included first.
This is good hygiene, and also happens to be required to build Dolphin
using Clang modules.

(Under this setup, each header file becomes a module, and each #include
is automatically translated to a module import.  Recursive includes
still leak through (by default), but modules are compiled independently,
and can't depend on defines or types having previously been set up.  The
main reason to retrofit it onto Dolphin is compilation performance - no
more textual includes whatsoever, rather than putting a few blessed
common headers into a PCH.  Unfortunately, I found multiple Clang bugs
while trying to build Dolphin this way, so it's not ready yet, but I can
start with this prerequisite.)
2014-10-21 21:22:16 -04:00
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
degasus 8b84ddce9a VideoCommon: rewrite frame skipping code 2014-09-04 18:07:39 +02:00
comex 608f9bcd67 Refactor opcode decoding a bit to kill FifoCommandRunnable.
Separated out from my gpu-determinism branch by request.  It's not a big
commit; I just like to write long commit messages.

The main reason to kill it is hopefully a slight performance improvement
from avoiding the double switch (especially in single core mode);
however, this also improves cycle calculation, as described below.

- FifoCommandRunnable is removed; in its stead, Decode returns the
number of cycles (which only matters for "sync" GPU mode), or 0 if there
was not enough data, and is also responsible for unknown opcode alerts.

Decode and DecodeSemiNop are almost identical, so the latter is replaced
with a skipped_frame parameter to Decode.  Doesn't mean we can't improve
skipped_frame mode to do less work; if, at such a point, branching on it
has too much overhead (it certainly won't now), it can always be changed
to a template parameter.

- FifoCommandRunnable used a fixed, large cycle count for display lists,
regardless of the contents.  Presumably the actual hardware's processing
time is mostly the processing time of whatever commands are in the list,
and with this change InterpretDisplayList can just return the list's
cycle count to be added to the total.  (Since the calculation for this
is part of Decode, it didn't seem easy to split this change up.)

To facilitate this, Decode also gains an explicit 'end' parameter in
lieu of FifoCommandRunnable's call to GetVideoBufferEndPtr, which can
point to there or to the end of a display list (or elsewhere in
gpu-determinism, but that's another story).  Also, as a small
optimization, InterpretDisplayList now calls OpcodeDecoder_Run rather
than having its own Decode loop, to allow Decode to be inlined (haven't
checked whether this actually happens though).

skipped_frame mode still does not traverse display lists and uses the
old fake value of 45 cycles.  degasus has suggested that this hack is
not essential for performance and can be removed, but I want to separate
any potential performance impact of that from this commit.
2014-09-01 14:35:23 -04:00
magumagu 39d439fc48 Opcode decoding: handle missing opcodes 0x88 etc.
Hardware testing shows that they do the same thing as the 0x80 family of
opcodes: they draw quads.
2014-05-10 20:33:28 -07:00
lioncash d2038049f5 Replace all include guard ifdefs with "#pragma once" 2014-02-10 18:07:16 -05:00
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