[32BITS] [RV64] Floating-point calculation is problematic
minipad2 (32-bit app) comes with an on-page calculator, and it's not working correctly on box64 RV64
![image](https://github.com/ptitSeb/box64/assets/15257961/515aa60e-ca1d-4a7b-9145-42db0f8167a5)
> RV64 (left), AMD64 Wine (right)