WP34s: Domain Error in RMDR and MOD

[Dieter]

I just noticed a strange behaviour of the RMDR and MOD functions. For large arguments they may return a "Domain Error". Some further investigation showed that these functions seem to work for y < 1E820 · x, and as soon as y gets larger the error occurs:

Code:

[DBLON]

[EEX] 820 [ENTER] 360 [x]   =>   3,6 E+822
360 [RMDR]                  =>   Domain Error
    [MOD]                   =>   Domain Error

[x<>y] [ENTER] [ULP] [-]    =>   3,599999999999999999999999999999999 E+822
360 [RMDR]                  =>   80

Since the arguments are out of range in single precision mode, all this happens only after switching to double precision.
Any idea what's going on here?

Dieter