Re: A86: More beginner questions

To: Assembly-86 <assembly-86@lists.ticalc.org>
Subject: Re: A86: More beginner questions
From: Dan Eble <eble@cis.ohio-state.edu>
Date: Wed, 13 May 1998 00:23:51 -0400 (EDT)
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <026601bd7e00$8ad422a0$02f4ffd0@matt>
Reply-To: assembly-86@lists.ticalc.org

On Tue, 12 May 1998, Matt2000 wrote:

> 
> Findpixel added A to HL this way  (before the 8 byte aligned routine)
> 
[snip]
> 
> Looks like your technique Dux is a whole 0.5 clock cycles faster.
> 

Only if the addition carries 50% of the time, which it probably won't.  It
could be anywhere from about 0.1 to 1.0 t-state faster, depending on where
FP_Bits is located.  Chances are high that FP_Bits does not cross a 
256-byte boundary, so there would never be a carry, and the routine would
wind up being 1 t-state faster.

I think my way is prettier, though.  :-)

--------
Dan Eble (mailto:eble@cis.ohio-state.edu)
         (http://www.cis.ohio-state.edu/~eble)

"Behold, how great a matter a little fire kindleth!" -- James 3:5

References:

Re: A86: More beginner questions

From: "Matt2000" <matt2000@gte.net>