Hi Sean,

Sean Breheny wrote:
> DIV instruction on a simple 16 bit processor. It should take a 16bit
> dividend and an 8bit divisor, and return an 8 bit quotient and an 8bit
> remainder.

Dividing 16 bit number with an 8 bit divisor could result in an 16 bit
quotient if the divisor is low value.

> At 09:14 AM 4/18/99 -0700, you wrote:
> >The fastest 8 by 8 divide is Andy Warren's 81-cycle screamer. Bob F.

Scott, I haven't seen Andy's routine but I've cooked up one with much
lesser cycle time:

;y = y/x remainder a
;13 words, 76 cycles: (untested)

div8:   movlw   8
        movwf   cnt
        clrf    a
        clrc                    ;may not be needed?
loop    rlf     y,f
        rlf     a,f
        movf    x,w
        subwf   a,w
        skpnc
         movwf  a
        decfsz  cnt,f
         goto   loop
        rlf     y,f

regards,
Reggie

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