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6 BASIC INSTRUCTIONS
6.2 Arithmetic Operation Instructions

BCD 8-digit multiplication and division operations

DB*(P), DB/(P)

Processing details

■DB*

• Multiplies the BCD 8-digit data designated by (S1) and the BCD 8-digit data designated by (S2), and stores the product at

the device designated by (D).

• If (D) has designated a bit device, the lower 8 digits (lower 32 bits) will be used for the product, and the higher 8 digits

(upper 32 bits) cannot be designated.

• 0 to 99999999 (BCD 8 digits) can be assigned to (S1) and (S2).

■DB/

• Divides 8-digit BCD data designated by (S1) and 8-digit BCD data designated by (S2), and stores the result in the device

designated by (D).

• 64 bits are used for the result of the division operation, and stored as quotient and remainder.

• If (D) has been designated as a bit device, the remainder of the operation will not be stored.

(S1): Data to be multiplied/divided or head number of the devices where the data to be multiplied/divided is stored (BCD 8 digits)
(S2): Data for multiplying/dividing or head number of the devices where the data for multiplying/dividing is stored (BCD 8 digits)
(D): Head number of the devices where the multiplication/division operation result will be stored (BCD 16 digits)

Setting
data

Internal device

R, ZR

J\

U\G

Constant
K, H

Others

Bit

Word

Bit

Word

(S1)





(S2)





(D)





• K1

 Lower 1 digit (b0 to 3)

• K4

 Lower 4 digits (b0 to 15)

• K8

 Lower 8 digits (b0 to 31)

• Quotient (BCD 8 digits)

 Stored at the lower 32 bits.

• Remainder (BCD 8 digits)

 Stored at the upper 32 bits.

Basic

Process

High

performance

Redundant Universal

LCPU

Command

DB , DB/

DB P, DB/P

indicates an instruction symbol of DB* , DB/.

Digits exceeding the designated number of digits
are assumed to be 0

(Lower 4 digits)

(Upper 4 digits)

(Lower 4 digits)

(Upper 4 digits)

Remainder

Quotient