HP HP-16C - Doubledivide

Section 4: Arithmetic and Bit Manipulation Functions 53
Example: To illustrate double multiplication, the calculation of
(7 X 6) in binary with word size 5 and 2’s Complement is shown
below.
7 00111 FivebitsinY.
Xoe X 00110 Five bitsin X.
42,0 00001 01010, Ten-bit representation of 42,
——— ——— gplit between X- and Y-registers.
X Y
Keystrokes Display ([STATUS]: 2-05-1000)
(BIN]111 00111 b Binary mode.
110(g][DBLX] 00001 b Most significant bits are
put in X.
(xxy] 01010 b Least significant bits
are putin Y. Result is
therefore 00001 01010,.
Double Divide
The function computes the quotient of a dividend of double
word size in the Y- and Z-registers—the most significant bits of
which are in the Y-register—divided by a single-word divisor in the
X-register. The stack drops twice, placing the single-word result in
the X-register.
Error O occurs if the answer cannot be represented in a single word
size. Flag 4 (carry) is set if the remainder is not equal to zero. The
stack contents during this operation are:
T t
Z dividend !
Y (high order bits in Y) t
X divisor (y...z)/x| quotient
Keys (¢](oBL:]