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SX Microcontroller Square Math Method


Square 8bits

;by Dmitry Kiryashov 


I still don't see solution shorter than 35 clocks. I've couple of them. 


1) 
        movfw x ;35 words/clocks 
        clrf x 
        rrf y,F 
; 
        skpnc ;this part is repeated 8 times 
        addwf x,F 
        rrf x,F 
        rrf y,F 
; 


2) 
        movfw x ;35 words/clocks 
        rrf y,F 
        skpc 
        subwf x,F 
        rrf x,F ;Cy=1 always before 
        rrf y,F 
; 
        skpnc ;this part is repeated 7 times 
        addwf x,F 
        rrf x,F 
        rrf y,F 
; 
        decf x,f ;substract first Cy=1

See also:

file: /Techref/scenix/lib/math/sq/8b_sx.htm, 0KB, , updated: 2004/6/10 13:40, local time: 2012/2/10 09:14,
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