Re: A82: hl*16

To: assembly-82@lists.ticalc.org
Subject: Re: A82: hl*16
From: Jeremy Wazny <j.wazny@ugrad.unimelb.edu.au>
Date: Wed, 1 Dec 1999 22:40:45 +1100 (EST)
In-Reply-To: <Pine.OSF.4.10.9912012211590.23484-100000@cassius.its.unimelb.edu.au>
Reply-To: assembly-82@lists.ticalc.org

Hmmm, that should say: "... upper bound on the value hl can have...".
My advice: stick with the 4 add's.

> 
> If there's an upper bound on the value l can have at that point in the
> program that is <= 127 it is faster (but will cost you an extra byte) to
> sll l. In the general case, 4 adds looks pretty tight. 
> 
> -Jeremy
> 
> On Tue, 30 Nov 1999, Doug Torrance wrote:
> 
> > 
> > Is there a better way to multiply hl times 16 than adding it to itself 4 
> > times?
> > 
> > 	add hl,hl
> > 	add hl,hl
> > 	add hl,hl
> > 	add hl,hl
> > 
> > Thanks!
> > Doug
> > 
> > 
> > ______________________________________________________
> > Get Your Private, Free Email at http://www.hotmail.com
> > 
> 
>

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Re: A82: hl*16

From: Jeremy Wazny <j.wazny@ugrad.unimelb.edu.au>

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