3 ms·

I guess that's true, I forgot about Apple making Rosetta 2 installable in Linux VMs. Also though, since Rosetta 2 was released, it's had an incredibly slow imp

I guess that's true, I forgot about Apple making Rosetta 2 installable in Linux VMs. Also though, since Rosetta 2 was released, it's had an incredibly slow implementation of x87 FPU operations, and anything that relies on x87 floating point math (including lots of games) is currently running about 100x slower than it ought to. Apple is aware of it but it's still not fixed in Ventura. I hadn't heard of FEX before, looks interesting.

mort96 4y ago
Huh, I thought everyone used SSE floats these days. I suppose there may be old games compiled with x87 floats, but I'd expect those to be made for CPUs so old that even slow x87 emulation wouldn't be a big issue. What software do people have x87-related issues with?
- skrrtww 4y ago
  The software I personally have the most issues with is Star Wars Episode 1: Racer, a 3d title from 1999 that from what I understand uses x87 math extensively. In Parallels (i.e. no Rosetta) it runs at 120fps easily, while in CrossOver the frame rate barely ekes above 20. Old titles like Half-Life, all other Source games, Fallout 3, SWTOR etc. all run vastly worse than they should, and many cannot run at playable framerates through Rosetta. Honestly, the problem most likely extends to more of Rosetta's floating point math than just x87. The author of REAPER has also written about it some: https://user.cockos.com/~deadbeef/index.php?article=842 https://user.cockos.com/~deadbeef/index.php?article=842 There's been lots of discussion about the issue in the Codeweavers forums, and Codeweavers points the blame squarely at Apple, who have been, predictably, very quiet about it.