I know that this is possible: for example, I have used the 64 bits divided
by 32 bits giving 16 bits on a x86 to build  a 128 divided by 64 giving 64
divide. The same principle would apply, of course. I see if I can find the
code.

Bob Ammerman
RAm Systems
(high performance, high function, low-level software)


----- Original Message -----
From: D Lloyd <dan.lloyd@GB.ABB.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, July 05, 2000 8:09 AM
Subject: [OT]: 32bit by 16bit divide algorithm request (M3822/General)


> Hi,
>
> A request from a colleague of mine:
>
> <snip>
> "The Mitsubishi M3822 Group microprocessors are variants of the earlier
6502
> device. The 3822 core features a 16 bit by 8 bit divide operation. I
require an
> extended divide operation, 32 bits by 16 bits, to give a 16 bit quotient
and a
> 16 bit remainder. Can this be done by using the built in 16 bit by 8 bit
> instruction to both simplify the code from the classic extended divide and
to
> speed things up?"
> <snip>
>
> I also believe he would be interested in a 'non-M3822 specific algorithm',
based
> around the 16 by 8 divide limitation, to give a 32 by 16 divide .
>
> Any help would be greatly appreciated.
>
> Kind regards,
>
> Dan Lloyd
>
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