please dont rip this site

Atmel AVR Microcontroller Basic Math Code Library

Divide 16 by 16 in software by http://elm-chan.org 

;-----------------------------------------------------------------------------:
; 16bit/16bit Unsigned Division
;
; Register Variables
;  Call:  var1[1:0] = dividend (0x0000..0xffff)
;         var2[1:0] = divisor (0x0001..0x7fff)
;         mod[1:0]  = <don't care>
;         lc        = <don't care> (high register must be allocated)
;
;  Result:var1[1:0] = var1[1:0] / var2[1:0]
;         var2[1:0] = <not changed>
;         mod[1:0]  = var1[1:0] % var2[1:0]
;         lc        = 0
;
; Size  = 16 words
; Clock = 179..211 cycles (+ret)
; Stack = 0 byte


div16u:		clr	mod0		;initialize variables
		clr	mod1		;  mod = 0;
		ldi	lc,16		;  lc = 16;
					;---- calculating loop
		lsl	var10		;var1 = var1 << 1;
		rol	var11		;/
		rol	mod0		;mod = mod << 1 + carry;
		rol	mod1		;/
		cp	mod0,var20	;if (mod => var2) {
		cpc	mod1,var21	; mod -= var2; var1++;
		brcs	PC+4		; }
		inc	var10		;
		sub	mod0,var20	;
		sbc	mod1,var21	;/
		dec	lc		;if (--lc > 0)
		brne	PC-11		; continue loop;
		ret
file: /Techref/atmel/avr/div16x16sw-ec.htm, 1KB, , updated: 2007/9/14 17:14, local time: 2025/1/17 03:33,
TOP NEW HELP FIND: 
18.97.9.175:LOG IN
 ©2025 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.piclist.com/techref/atmel/avr/div16x16sw-ec.htm"> Atmel AVR, atmega, Microcontroller, embedded controller, math, division, 16x16, elm-chan.org</A>
After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?
  PICList 2025 contributors:
o List host: MIT, Site host massmind.org, Top posters @none found
- Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .