Other things worth noting about denormal numbers:

- It’s not just ‘old’ FPUs that handle them verrry slowly. Benchmark this aspect of your target processors if this detail matters.

- Most modern processors provide a “flush to zero” denormal handling mode (and sometimes you can separately specify “denormals are zero”, relevant when e.g. loading old data). However, math libraries usually haven’t been written with this mode in mind, so you need to be careful with this.