;**********************************************************************
;SMALL 8 BIT SQUARE ROOT
;
;Author: Nikolai Golovchenko <golovchenko at mail.ru>
;Idea: Scott Dattalo <www.dattalo.com>
;"Hint: n^2 = sum of the first n odd integers.(e.g 9 = 3*3 = 1 + 3 + 5)"
;Date: February 16, 2000
;
;Input and output in ACCB0
;ROM - 9
;RAM - 1
;Timing - 12..87 cycles including call and return
;**********************************************************************
Sqrt8s
movlw -1
Sqrt8s1
addlw 2
subwf ACCB0, f
skpnc
goto Sqrt8s1
movwf ACCB0
; decf ACCB0, f
;Dmitry Kiryashov says: Since W is always holding odd value this decf
; isn't required I guess. ... W is always 1,3,5,7,9,.. right?
;and Scott Dattalo aggrees.
rrf ACCB0, f
return
;**********************************************************************
| file: /Techref/microchip/math/sqrt/sqrt8ngsd.htm, 1KB, , updated: 2000/2/17 10:49, local time: 2024/11/25 09:22,
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