This is our fourth tagged release, and it comes with loads of compatibility fixes, usability and documentation improvements.

Compatibility & Bug Fixes

• Disables RCPC on ARM64 JIT
• Implements CPUID 0x8000’0005 for L1 cacheline information
• Implements CPUID 0x8000’0006 for cacheline information
• Implements MOVNTDQA
• Restrict imm code motion around selects to matching sizes, fixes dav1d
• Validate LOCK handling, add missing segment offsets
• Add atomic logic for SecondaryALUOp
• Adds support for locked NOT
• Adds support for locked ADC and SBB
• Adds a couple new 32bit syscalls
• Fixes an edge case of 32bit cmpxchg <reg>, <reg>
• Lock around FDToNameMap accesses (Fixes Geekbench 4 stability issues)
• Flush context around OP_SYSCALLs, Syscalls might read it
• SA_NOCLDSTOP only blocks CLD_CONTINUED/STOPPED/TRAPPED
• Add missing break for UD2 in INTOp
• Init on X87FNSAVE, fix FNINIT
• Switches FEXCore over to pthreads implementation

Usability

• Support for global application profiles
• Thunks can be configured with json as an overlay
• FEXConfig improvements
• Adds support for Named RootFS folders in FEXConfig
• Cleanup threads when they exit
• Default to no logging
• Allows installing of FEXThunks in our data directory

Documentation

• New Readme.md & auto generated SourceOutline.md to help newcomers to the codebase
• Man Pages

Internal restructuring

• Unify all four dispatchers
• Separate thread and state
• Allow both ARM64 and X86_64 jits to be compiled at the same time

The detailed change log is available on Github