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Simple16BitDivision.asm
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Simple16BitDivision.asm
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; Simple16BitDivision.asm
;
; Created: 11/11/2019 1:30:00 PM
; Author: Logan Wood
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <https://www.gnu.org/licenses/>.
; 16-BIT DIVISION
div16:
SUB numL,denL ;subtract lower denominator byte from lower numerator byte
SBC numH,denH ;subtract (higher denominator byte + C) from higher numerator byte
BRCS div16bit_remainder ;if numerator higher byte requires a carry, calculate remainder
INC result ;increment result
RJMP div16bit ;loop back
div16_remainder:
MOV remainder,numL ;copy lower byte of numerator into remainder
ADD remainder,denL ;add lower byte of denominator into remainder (throws a carry)
RET ;return