please dont rip this site

SX Microcontroller Math Method

Multiply 16x16 bit macro from Bob Fehrenbach, Scott Dattalo

Posted to PICList Mon Aug 4 10:17:59 1997

;*******************************************************************
; Double Precision Multiplication
;
; n_2 : n_1 * n_4 : n_3 -> q_4:q_3:q_2:q_1
;
; Standard shift and add.
; Execution time: 215 to 295 clock cycles.
; Code space: 22 locations
;
; Cleaned up and corrected version from Microchip Ap note by BF.
; Note: Ap note has errors! Additional mods by Scott Dattalo.
;
;*******************************************************************


mpy16b16: macro
local m1, m2
	clr	q_4
	clr	q_3
	clr	q_2
	clr	q_1
	setb	q_2.7
m1:
	rr	n_2
	rr	n_1
	sb	C
	jmp	m2
	mov	W, n_3
	add	q_3, W
	mov	W, n_4
	snb	C
	movsz	W, ++n_4
	add	q_4, W
m2:
	rr	q_4
	rr	q_3
	rr	q_2
	rr	q_1
	sb	C
	jmp	m1

endm

file: /Techref/scenix/lib/math/mul/16x16bfsd_sx.htm, 1KB, , updated: 2004/6/10 13:40, local time: 2022/12/6 05:03,
TOP NEW HELP FIND: 
44.192.52.167:LOG IN

 ©2022 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://massmind.org/Techref/scenix/lib/math/mul/16x16bfsd_sx.htm"> PIC Microcontroller Math Method Multiply 16x16 bit macro</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?

 

Welcome to massmind.org!

 

Welcome to massmind.org!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .