Java: is there no AtomicFloat or AtomicDouble?

Question

I have found AtomicInteger, AtomicLong, but where is AtomicFloat (or AtomicDouble)? Maybe there is some trick?

Answer 1

It's not a java issue, all languages suffer from this.

The assembly instructions which the atomic compare and swap operations compile down to are variants of: http://x86.renejeschke.de/html/file_module_x86_id_41.html

These all operate on integers and the pipelined nature of the FPU makes it much harder to implement for floats/doubles.