Steam Deck

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Valve is working on a version of proton for ARM devices (x.com)

submitted 1 month ago* (last edited 1 month ago) by [email protected] to c/[email protected]

82 comments fedilink hide all child comments

This would presumably let x86 windows games run on ARM hardware.

This is almost certainly meant for the next Valve VR headset, but ARM has so much better power efficiency than x86 that a future ARM based Deck would be a huge improvement to battery life.

Also see this tweet:

VR games that have already secretly pushed Android ARM builds onto the Steam Store are ran via Waydroid (androidARM to LinuxARM)

VR games that do not have an ARM build on Steam (windows x86) are being translated/emulated via ProtonARM and FEX

Edit: here's gamingonlinux coverage of this info, includes some more information

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[–] [email protected] 6 points 1 month ago* (last edited 1 month ago) (1 children)

does ARM still have better battery life when all of the machine code has to be translated from x86

afaik macos/rosetta is more efficient than native windows/x86, but that could be down to OS integration, or any number of confounding factors… i’d suggest though that x86 windows applications sometimes run better and more efficiently on alternative platforms, even with the translation layers - whether that’s down to the instruction set or a combination of factors

[–] [email protected] 13 points 1 month ago (2 children)

IIRC, the M chips also have a couple of specific hardware accelerators for some parts of x86 code that ARM devices would usually struggle with. That's something that other ARM chips (presumably) don't have.

[–] [email protected] 4 points 1 month ago

X Elite has those same tricks

[–] [email protected] 1 points 1 month ago

It's more like a built-in hardware emulation mode than anything else. Modern ARM chips use out of order execution as the default, whereas x86 uses ordered execution as the default. M-series and Snapdragon X chips have a little flag that can be passed to tell the hardware to run in in-order mode instead of out-of-order mode.