When working under the FRR recovery routine state, the first recovery routine will normally see the time-of-error Floating Point Registers (FPRs) and the Floating Point Control (FPC) register. The DXC value is provided in the SDWA. It is this value that should be used rather than the copy in the Floating Point Control register.
If control can pass to other recovery routines, and the first recovery routine modifies any of the FPRs or FPC register, it is responsible to save and restore the time-of-error FPRs and FPC register.
If retry is to be done, a recovery routine can (manually) change the value(s) of the FPR(s) and FPC register. Changes to the non-volatile fields (i.e., the IEEE settings) in the FPC register must be made carefully since this could affect the processing of the rest of the current program, and possibly subsequent programs.