Re: A86: Multiplying by 10.

To: Assembly-86 <assembly-86@lists.ticalc.org>
Subject: Re: A86: Multiplying by 10.
From: Dan Eble <eble@cis.ohio-state.edu>
Date: Mon, 3 Nov 1997 08:52:09 -0500 (EST)
In-Reply-To: <199710310205.VAA06797@alpha.q-net.net>
Reply-To: assembly-86@lists.ticalc.org

On Thu, 30 Oct 1997, Garcia wrote:

> What is the easiest and fastest way to multiply a sinlge register by 10. 
> I've tried several ways but their no good.
> 
> Andres Garcia
> 

What ways have you tried?  This is what I would do.
Input:  Register A contains a value.
Output: Register A contains 10*value, and B is modified.

	sll	a	; a = 2*original value
	ld	b,a	; b = 2*original value
	sll	a	; a = 4*original value
	sll	a	; a = 8*original value
	add	a,b	; a = 10*original value

There's a routine in the ROM that will do this for you.

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

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

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