20638c2e61
PM4 buffer handling made a virtual member of commandprocessor, place the implementation/declaration into reusable macro files. this is probably the biggest boost here. Optimized SET_CONSTANT/ LOAD_CONSTANT pm4 ops based on the register range they start writing at, this was also a nice boost Expose X64 extension flags to code outside of x64 backend, so we can detect and use things like avx512, xop, avx2, etc in normal code Add freelists for HIR structures to try to reduce the number of last level cache misses during optimization (currently disabled... fixme later) Analyzed PGO feedback and reordered branches, uninlined functions, moved code out into different functions based on info from it in the PM4 functions, this gave like a 2% boost at best. Added support for the db16cyc opcode, which is used often in xb360 spinlocks. before it was just being translated to nop, now on x64 we translate it to _mm_pause but may change that in the future to reduce cpu time wasted texture util - all our divisors were powers of 2, instead we look up a shift. this made texture scaling slightly faster, more so on intel processors which seem to be worse at int divs. GetGuestTextureLayout is now a little faster, although it is still one of the heaviest functions in the emulator when scaling is on. xe_unlikely_mutex was not a good choice for the guest clock lock, (running theory) on intel processors another thread may take a significant time to update the clock? maybe because of the uint64 division? really not sure, but switched it to xe_mutex. This fixed audio stutter that i had introduced to 1 or 2 games, fixed performance on that n64 rare game with the monkeys. Took another crack at DMA implementation, another failure. Instead of passing as a parameter, keep the ringbuffer reader as the first member of commandprocessor so it can be accessed through this Added macro for noalias Applied noalias to Memory::LookupHeap. This reduced the size of the executable by 7 kb. Reworked kernel shim template, this shaved like 100kb off the exe and eliminated the indirect calls from the shim to the actual implementation. We still unconditionally generate string representations of kernel calls though :(, unless it is kHighFrequency Add nvapi extensions support, currently unused. Will use CPUVISIBLE memory at some point Inserted prefetches in a few places based on feedback from vtune. Add native implementation of SHA int8 if all elements are the same Vectorized comparisons for SetViewport, SetScissorRect Vectorized ranged comparisons for WriteRegister Add XE_MSVC_ASSUME Move FormatInfo::name out of the structure, instead look up the name in a different table. Debug related data and critical runtime data are best kept apart Templated UpdateSystemConstantValues based on ROV/RTV and primitive_polygonal Add ArchFloatMask functions, these are for storing the results of floating point comparisons without doing costly float->int pipeline transfers (vucomiss/setb) Use floatmasks in UpdateSystemConstantValues for checking if dirty, only transfer to int at end of function. Instead of dirty |= (x == y) in UpdateSystemConstantValues, now we do dirty_u32 |= (x^y). if any of them are not equal, dirty_u32 will be nz, else if theyre all equal it will be zero. This is more friendly to register renaming and the lack of dependencies on EFLAGS lets the compiler reorder better Add PrefetchSamplerParameters to D3D12TextureCache use PrefetchSamplerParameters in UpdateBindings to eliminate cache misses that vtune detected Add PrefetchTextureBinding to D3D12TextureCache Prefetch texture bindings to get rid of more misses vtune detected (more accesses out of order with random strides) Rewrote DMAC, still terrible though and have disabled it for now. Replace tiny memcmp of 6 U64 in render_target_cache with inline loop, msvc fails to make it a loop and instead does a thunk to their memcmp function, which is optimized for larger sizes PrefetchTextureBinding in AreActiveTextureSRVKeysUpToDate Replace memcmp calls for pipelinedescription with handwritten cmp Directly write some registers that dont have special handling in PM4 functions Changed EstimateMaxY to try to eliminate mispredictions that vtune was reporting, msvc ended up turning the changed code into a series of blends in ExecutePacketType3_EVENT_WRITE_EXT, instead of writing extents to an array on the stack and then doing xe_copy_and_swap_16 of the data to its dest, pre-swap each constant and then store those. msvc manages to unroll that into wider stores stop logging XE_SWAP every time we receive XE_SWAP, stop logging the start and end of each viz query Prefetch watch nodes in FireWatches based on feedback from vtune Removed dead code from texture_info.cc NOINLINE on GpuSwap, PGO builds did it so we should too. |
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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.