JitArm64: Implement FMA-less path for FMA instructions #9815
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For determinism compatibility with old x64 CPUs. Off by default.
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For determinism compatibility with old x64 CPUs. Off by default.
I haven't tested this on netplay, but I've tested that the new code path doesn't break games in any obvious way. (Other than breaking existing F-Zero GX replays, which is unsurprising)
This is a follow-up to PR #9804.