Function Name

DSdiv

Purpose

Signed 16 bit by 16 bit division.

Call Address

$C16C

Input

Y - The address of the 16 bit divisor.

X - The address of the 16 bit dividend.

Output

X - The address of the 16 bit quotient.

R8 - $12-$13 - The 16 bit remainder.

Description

This routine is one of the GEOS math routines. X and Y each have the address of a term in the division. Both terms are made positive with Dabs. Ddiv is then called; if the result of the division should be negative, DNegate is called. The quotient is stored in place of the original dividend that X pointed to. The divisor is left untouched. The remainder is always a positive integer.