> CSR write could be expensive, it will flush whole pipeline in some > RISC-V core implementation… Hopefully not flush but just sequentialize but yes, it's usually a performance concern. However if we set the rounding mode to something else for an intrinsic and then call a function we want to restore it one way or another, right?
That's also the reason why glibc has done a lot of work to minimize fesetround calls (or other fcsr setters). Regards Robin
