33a6cfc0a7
Add alternate path to DOT_PRODUCT_3/4 for use_fast_dot_product that skips all the status register stuff and just remaps inf to qnan Add OPCODE_TO_SINGLE to replace the CONVERT_F32_F64 - CONVERT_F64_F32 sequence we used to emit with the idea that a backend could implement a more correct rounding behavior if possible on its arch Remove some impossible sequences like MUL_HI_I8/I16, MUL_ADD_F32, DIV_V128. These instructions have no equivalent in PPC. Many other instructions are unused/dead code and should be removed to make the x64 backend a better reference for future ones Add backend_flags to Instr. Basically, flags field that a backend can use for whatever it wants when generating code. Add backend instr flag to x64 that tells it to not generate code for an instruction. this allows sequences to consume subsequent instructions Generate actual x64 code for VSL instruction instead of using callnativesafe Detect repeated COMPARE instructions w/ identical operands and reuse the results in FLAGS if so. this eliminates a ton of garbage compare/set instructions. If a COMPARE instructions destination is stored to context with no intervening instruction and no additional uses besides the store, do setx [ctx address] Detect prefetchw and use it in CACHE_CONTROL if prefetch for write is requested instead of doing prefetch to all cache levels Fixed an accident in an earlier commit by me, VECTOR_DENORMFLUSH was not being emitted at all, so denormal inputs to MUL_ADD_V128 were not becoming zero and outputs from DOT_PRODUCT_X were not either. I believe this introduced a bug into RDR where a wagon wouldnt spawn? (https://discord.com/channels/308194948048486401/308207592482668545/1000443975817252874) Compute fresx in double precision using RECIP_F64 and then round to single instead of doing (double)(1.0f / (float)value), matching original behavior better Refactor some of ppc_emit_fpu, much of the InstrEmit function are identical except for whether they round to single or not Added "tail emitters" to X64Emitter. These are callbacks that get invoked with their label and the X64Emitter after the epilog code. This allows us to move cold code out of the critical path and in the future place constant pools near functions guest_to_host_thunk/host_to_guest_thunk now gets directly rel32 called, instead of doing a mov Add X64BackendContext structure, represents data before the start of the PPCContext Instead of doing branchless sequence, do a compare and jump to tail emitted code for address translation. This makes converting addresses a 3 uop affair in most cases. Do qnan move for dot product in a tail emitter Detect whether EFLAGS bits are independent variables for the current cpu (not really detecting it ehe, just checking if zen) and if so generate inc/dec for add/sub 1 Detect whether low 32 bits of membase are 0. If they are then we can use membasereg.cvt32() in place of immediate 0 in many places, particularly in stores Detect LOAD MODIFY STORE pattern for context variables (currently only done for 64 bit ones) and turn them into modify [context ptr]. This is done for add, sub, and, or, xor, not, neg Tail emit error handling for TRAP opcodes Stub out unused trap opcodes like TRAP_TRUE_I32, TRAP_TRUE_I64, TRAP_TRUE_I16 (the call_true/return_true opcodes for these types are also probably unused) Remove BackpropTruncations. It was poorly written and causes crashes on the game Viva pinata (https://discord.com/channels/308194948048486401/701111856600711208/1000249460451983420) |
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|---|---|---|
| .github | ||
| android/android_studio_project | ||
| assets | ||
| docs | ||
| src/xenia | ||
| third_party | ||
| tools | ||
| .appveyor.yml | ||
| .azure-pipelines.yml | ||
| .clang-format | ||
| .drone.star | ||
| .gdbinit | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| LICENSE | ||
| README.md | ||
| premake5.lua | ||
| xb | ||
| xb.bat | ||
| xb.ps1 | ||
| xenia-build | ||
| xeniarc | ||
README.md
Xenia - Xbox 360 Emulator
Xenia is an experimental emulator for the Xbox 360. For more information, see the main Xenia wiki.
Interested in supporting the core contributors? Visit Xenia Project on Patreon.
Come chat with us about emulator-related topics on Discord.
For developer chat join #dev but stay on topic. Lurking is not only fine, but encouraged!
Please check the FAQ page before asking questions.
We've got jobs/lives/etc, so don't expect instant answers.
Discussing illegal activities will get you banned.
Status
| Buildbot | Status | Releases |
|---|---|---|
| Windows | Latest ◦ All | |
| Linux |  |
Quite a few real games run. Quite a few don't. See the Game compatibility list for currently tracked games, and feel free to contribute your own updates, screenshots, and information there following the existing conventions.
Disclaimer
The goal of this project is to experiment, research, and educate on the topic of emulation of modern devices and operating systems. It is not for enabling illegal activity. All information is obtained via reverse engineering of legally purchased devices and games and information made public on the internet (you'd be surprised what's indexed on Google...).
Quickstart
See the Quickstart page.
Building
See building.md for setup and information about the
xb script. When writing code, check the style guide
and be sure to run clang-format!
Contributors Wanted!
Have some spare time, know advanced C++, and want to write an emulator? Contribute! There's a ton of work that needs to be done, a lot of which is wide open greenfield fun.
For general rules and guidelines please see CONTRIBUTING.md.
Fixes and optimizations are always welcome (please!), but in addition to that there are some major work areas still untouched:
- Help work through missing functionality/bugs in games
- Reduce the size of Xenia's huge log files
- Skilled with Linux? A strong contributor is needed to help with porting
See more projects good for contributors. It's a good idea to ask on Discord and check the issues page before beginning work on something.
FAQ
See the frequently asked questions page.