Comment on Expanded Steam gaming compatibility likely coming to Arm chips with hundreds of Windows games — Valve testing ARM64 Proton compatibility layer

steventhedev@lemmy.world ⁨2⁩ ⁨months⁩ ago

From what I’ve understood of this - it’s transpiling the x86 code to ARM on the fly. I honestly would have thought it wasn’t possible but hearing that they’re doing it - it will be a monumental effort, but very feasible. The best part is that once they’ve gotten CRT and cdecl instructions working - actual application support won’t be far behind. The biggest challenge will likely be inserting memory barriers correctly - a spinlock implemented in x86 assembly is highly unlikely to work correctly without a lot of effort to recognize and transpile that specific structure as a whole.

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