Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B840F1024GM64/FPUEH/IEN#0x0
Interrupt Enable Register
FPIOC Interrupt Enable
FPDZC Interrupt Enable
FPUFC Interrupt Enable
FPOFC Interrupt Enable
FPIDC Interrupt Enable
FPIXC Interrupt Enable
https://github.com/cmsis-svd/cmsis-svd-data