Toshiba 6F3B0253 user manual Dneg, Double-word 2’s complement

6F3B0253

7. Instructions

FUN 183

DNEG

Double-word 2’s complement

Expression

Input − [ A+1⋅A DNEG B+1⋅B ]− Output

Function

When the input is ON, this instruction finds the 2’s complement value of double-word data A+1⋅A, and stores it in B+1⋅B.

Execution condition

Input		Operation	Output
OFF	No execution		OFF
ON	Execution		ON

Operand

Name

Device

Register

Constant

Index

X

Y

R

S

T.

C.

XW

YW

RW

SW

T

C

D

I

J

K

A

Source

√

√

√

√

√

√

√

√

B

Destination

√

√

√

√

√

√

Example

When X007 is ON, the 2’s complement value (sign inverted data) of double-word register RW41⋅RW40 is stored in double-word register D0151⋅D0150.

For example, if RW41⋅RW40 is -1234567890, the 2’s complement value 1234567890 is stored in D0151⋅D0150.

Note

•The data range of A+1⋅A is -2147483648 to 2147483647. If the data of A+1⋅A is -2147483648, the same data -2147483648 is stored in B+1⋅B.

Basic Hardware and Function 233