[Safety1stClyde]

I got confused reading this, because first of all it has a picture of 64 bit floating point, then it starts comparing float to int32_t. Obviously 64 bit floating point is "double" not "float", but then it has a picture of 64 bit and program code using int32_t.

What I would say is that when you're considering comparison of floating point numbers, it's important to understand what the operation means in terms of the data which you're representing using the floating point numbers, in other words what does it mean in terms of the data for two values to be equal or not equal. Usually there is a precision inherent in the data itself which will guide you to how to formulate equality, if necessary.