I have a rather embarrassing question.
I have been able to do division easily using the divq method in
assembler in previous DSPs, but I can't figure out how to do it in the
21065L assembler.
So far, I have been able to compute by hand the 1/n for a number, then
do a multiply in 21065l, but now I have numbers that change, meaning
variables instead of constants that I need to do division with.
So, if I have in DM variable a, that I need to divide by DM variable
b, can someone send me either the syntax to do this, or a quick
routine (in assembler, not C, C is easy)?
Sorry, I have figured out a lot, but this one eludes me at the moment.

Thanks,
John Henry
Sevierville, TN

Posted by Mike Rosing●March 30, 2005

On Wed, 30 Mar 2005, John Henry wrote:

> I have a rather embarrassing question.
> I have been able to do division easily using the divq method in
> assembler in previous DSPs, but I can't figure out how to do it in the
> 21065L assembler.
> So far, I have been able to compute by hand the 1/n for a number, then
> do a multiply in 21065l, but now I have numbers that change, meaning
> variables instead of constants that I need to do division with.
> So, if I have in DM variable a, that I need to divide by DM variable
> b, can someone send me either the syntax to do this, or a quick
> routine (in assembler, not C, C is easy)?
> Sorry, I have figured out a lot, but this one eludes me at the moment.

Look in the manual for Fn = RECIPS Fx. They have a routine for doing
inversion. It works fine, I use it a lot :-)

Patience, persistence, truth,
Dr. mike

Posted by andor_bariska●March 31, 2005

John Henry wrote: > I have a rather embarrassing question.
> I have been able to do division easily using the divq method in
> assembler in previous DSPs, but I can't figure out how to do it in the
> 21065L assembler.
> So far, I have been able to compute by hand the 1/n for a number, then
> do a multiply in 21065l, but now I have numbers that change, meaning
> variables instead of constants that I need to do division with.
> So, if I have in DM variable a, that I need to divide by DM variable
> b, can someone send me either the syntax to do this, or a quick
> routine (in assembler, not C, C is easy)?
> Sorry, I have figured out a lot, but this one eludes me at the moment.