mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-14 07:00:43 +02:00
Ryan Houdek
f2841ccb5e
Every time I see this recursive mutex I glare at it. Remove the last one so that we no longer need to deal with it. The only reason why this recursive mutex still existed today was because it is fairly intertwined with the ContextImpl and tracing it all was a pain. Peel back the layers and follow the idiom to have ContextImpl pull the write mutex when requiredand pass it through by reference to ensure it stays alive. This allows us to entirely give rid of the recursive nature of the mutex, which means that `FindBlock` can eventually be switched over to a read-lock to improve multiple threads reading the caches at the same time. I didn't do that exercise since that can be followed up in a subsequent PR.
FEXCore - Fast x86 Core emulation library
This is the core emulation library that is used for the FEX emulator project. This project aims to provide a fast and functional x86-64 emulation library that can meet and surpass other x86-64 emulation libraries.
Goals
- Be as fast as possible, beating and exceeding current options for x86-64 emulation
- 25% - 50% lower performance than native code would be desired target
- Use an IR to efficiently translate x86-64 to our host architecture
- Support a tiered recompiler to allow for fast runtime performance
- Support offline compilation and offline tooling for inspection and performance analysis
- Support threaded emulation. Including emulating x86-64's strong memory model on weak memory model architectures
- Support a significant portion of the x86-64 instruction space.
- Including MMX, SSE, SSE2, SSE3, SSSE3, and SSE4*
- Support fallback routines for uncommonly used x86-64 instructions
- Including x87 and 3DNow!
- Only support userspace emulation.
- All x86-64 instructions run as if they are under CPL-3(userland) security layer
- Minimal Linux Syscall emulation for testing purposes
- Portable library implementation in order to support easy integration in to applications
Target Host Architecture
The target host architecture for this library is AArch64. Specifically the ARMv8.1 version or newer. The CPU IR is designed with AArch64 in mind but should allow for other architectures as well. x86-64 host support is available for ease of development, but is not a priority.
Not desired
- Kernel space emulation
- CPL0-2 emulation
- Real Mode, Protected Mode, Virtual-8086 Mode, System Management Mode
- IRQs
- SVM
- "Cycle Accurate" emulation