[Coco] was: [...] Japanese?!?, Reply of Hirotsugu

[jdaggett at gate.net]

Robert

It was from a 1992 post. 
It was from a 1992 post.
It was from a 1992 post.
It was from a 1992 post.

It was my deduction and that is all.

He showed an example of the DIVQ instruction and from his data I 
deduced that the quotent went into W and the remainder  was in D. 
If the quotent is greater than a 16 bit number that will yield an 
overflow, ie. 2^24 divided by 2^5 will yield 2^19. That is bigger than 
2^14. That should lead to an overflow. 

If I have made a mistake in my deduction then so be it. 


james
 

On 8 Jan 2005 at 15:40, Robert Gault wrote:

Date sent:      	Sat, 08 Jan 2005 15:40:26 -0500
From:           	Robert Gault <robert.gault at worldnet.att.net>
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<coco at maltedmedia.com>
Subject:        	Re: [Coco] was: [...] Japanese?!?, Reply of 
Hirotsugu
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> Where did this next quote come from? I have not seen any recent posts
> by Kevin Darling. In any case, the following quote is incorrect!
> 
> >>From Kevin Darling's post, I now see where overflow problems can 
> > come from in the DIVQ instruction. It appears that the quotent is in
> > the W register and the remainder in the D register. If the Quotent
> > is greater than 16 bits then whamo, overflow! This will happen with
> > a very large dividend and a small divider.