[gautamcgoel]

This is surprising to me! Can you explain what problems you encountered? My (limited) understanding is that the main effect of fast-math is to turn off support for subnormals. Since subnormals are only used to represent extremely small values, I wouldn't expect them to have much effect in the real world.

[subharmonicon]

fast-math can result in many things you may not expect, e.g. treating FP operations as being associative and distributive, which they aren’t.

[Dylan16807]

Sure but when does that matter in video game math?