Why won't my 11/23 do long division?

[jon]

I compiled some code with the Ritchie C compiler to run on an 11/23.
There was one long division in the code and I found that the LSWord
of the dividend was being ignored (treated as zero) for a particluar
range of MSWords.

I decided writing a quick long division routine in C was a faster
solution than debugging ldiv().  Anyone know why ldiv() should fail
on an 11/23???

-jonathan hahn
...!ucbvax!atd!avsdT:jon
Ampex Corp.