The consensus seems to be that there likely isn't a problem with ARM64 FMADD compared to the IEEE standard. In light of this and the recommendation in the post

The consensus seems to be that there likely isn't a problem with ARM64 FMADD compared to the IEEE standard. In light of this and the recommendation in the post - which seems to be potentially misleading. "If you use different tools and want to ensure best results from floating point arithmetic on ARM64, you may wish to check that code generation doesn’t use fused instructions, particularly on large loops which could accumulate significant errors. It’s worth bearing in mind that authoritative texts on floating-point arithmetic are also extremely cautious about the use of such fused instructions." I do hope that the original poster updates the post to reflect some definitive and validated conclusions. (And also not rely on Betteridge's Law for the headline!)