FEX-Emu/FEX
1
0
Fork 0
mirror of https://github.com/FEX-Emu/FEX.git synced 2025-02-14 19:47:59 +00:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity
FEX/External/FEXCore
History
Ryan Houdek 35e97ec9bc IR: Adds Option to run the IRDumper with more configurations 
This is incredibly useful and I find myself hacking this feature in
every time I am optimizing IR. Adds a new configuration option which
allows dumping IR at various times.

Before any optimization passes has happened
After all optimizations passes have happened
Before and After each IRPass to see what is breaking something.

Needs #2864 merged first
2023-08-09 05:58:20 -07:00
..
docs
Merge pull request #2769 from random415/main
2023-07-13 11:48:39 -07:00
include
Config: Adds support for overriding host features
2023-08-09 03:51:37 -07:00
Scripts
Config: Adds support for overriding host features
2023-08-09 03:51:37 -07:00
Source
IR: Adds Option to run the IRDumper with more configurations
2023-08-09 05:58:20 -07:00
unittests
ARMEmitter: Add missing atomic aliases
2023-08-04 21:49:59 -04:00
CMakeLists.txt
FEXCore: Compile without exceptions
2023-05-04 14:42:02 -07:00
LICENSE
FEXCore: Move to Externals/FEXCore
2020-03-06 09:07:37 +02:00
Readme.md
docs: Remove stale text
2022-03-29 11:27:43 +02:00

Readme.md

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