extended use for fast integer calculations?

From: Adrian (adrianne54_at_poczta.onet.pl)
Date: 03/21/04 

Date: Sat, 20 Mar 2004 23:36:33 +0000 (UTC)

Hello!
I've read extended type documentation, and there's stated that number of
fraction bits is 64, so I've got an idea that it could be used for fast
multiplication of two 32-bit integers, or for division of 64-bit integer. Is
that possible that operations in which either arguments or result is 64 bit
are calculated on extended precisly, just as they would be calculated using
general-use registers? It could accelerate some operations on long integers
(over 1024 bits), but absolute precision is of highest importance.

Thanks from advance
Adrian