> [Fixed point arithmetic] has some niche uses but isn't commonly used It is very common in the embedded world and in hardware. I routinely program a CPU which

> [Fixed point arithmetic] has some niche uses but isn't commonly used It is very common in the embedded world and in hardware. I routinely program a CPU which has no FPU, so any arithmetic will have to be done in fixed point. It's perfectly possible to get work done with fixed point arith, it just requires a bit more thinking through so you don't run out of bits. Usually, I write unit tests where I compile my code for host architecture and compare the fixed point result to host's floating point. Then I can set a precise error margin for my XP approximation.