Toshiba PROSEC T3H user manual Double-word multiplication and division D∗

2. Expanded Functions

2.4.1 Double-word multiplication and division (D∗//)

FUN 042

D∗ /

Double-word multiplication and division

Expression

Input ─[ A+1⋅A D∗ / B+1⋅B → C+1⋅C ]─ Output

Function

When the input is ON, the data of A+1⋅A is multiplied by the data of B+1⋅B, and the product is divided by B+3⋅B+2, then the quotient is stored in C+1⋅C and the remainder in C+3⋅C+2.

The data range is -2147483648 to 2147483647. If the result (quotient) is out of the data range, the following limit value is stored.

Positive overflow: quotient = 2147483647, remainder = 0

Negative overflow: quotient = -2147483647, remainder = 0

Execution condition

Input		Operation		Output	ERF
OFF	No execution			OFF	−
ON	B+3⋅B+2 ≠	0, no overflow	Normal execution	ON	−
	B+3⋅B+2 ≠	0, overflow	Limit	ON	ON
	B+3⋅B+2 =	0	No execution	OFF	ON

Operand

Name

Device

Register

Con-

Index

X

Y

S

L

R

Z

T.

C.

I

O

X

Y

S

L

R

W

T

C

D

F

I

O

I

J

K

stant

W

W

W

W

W

W

W

A

Operation

√

√

√

√

√

√

√

√

√

√

√

√

data

B

Multiplier,

√

√

√

√

√

√

√

√

√

√

√

divisor

C

Result

√

√

√

√

√

√

√

√

√

√

Example

When R0200 is ON, the double-word data of D0351⋅D0350 is multiplied by the data of D0262⋅D0261, and the product is divided by the data of D0264⋅D0263, then the quotient is stored in D0401⋅D0400 and the remainder in D0403⋅D0402.

44 PROSEC T3H