FEX-Emu publishes a technical deep-dive into the challenges of emulating x86's Total Store Ordering (TSO) memory model on ARM's relaxed memory architecture. The article covers atomic instructions, split-lock behavior, uncached memory requirements, and the fundamental consistency vs. atomicity distinction that makes cross-architecture emulation particularly difficult.
Background
FEX-Emu is an open-source Linux user-mode x86/x86-64 emulator designed to run x86 applications on ARM Linux systems, notably popularized through projects like Steam Deck compatibility and GameMode integrations.
- Source
- Lobsters
- Published
- Sep 19, 2026 at 01:01 PM
- Score
- 7.0 / 10