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6-22

+(P),-(P)

Arithmetic Operation Instructions

BIN 16-bit addition and subtraction operations (+(P),-(P))

+(P),-(P)

 When two data are set (

+

, 

-

)

Function

(1) Adds 16-bit BIN data designated by 

 to 16-bit BIN data designated by 

 and stores the 

result of the addition at the device designated by 

.

(2) Values for 

 and 

 can be designated between  32768 and 32767 (BIN, 16 bits).

(3) The judgment of whether data is positive or negative is made by the most significant bit 

(b15).
 • 0: Positive

 • 1: Negative

(4) The following will happen when an underflow or overflow is generated in an operation result:    

The carry flag in this case does not go ON.

:

 

Data for additing/subtracting or head number of the devices where the data for additing/subtracting is stored 

(BIN 16 bits)

:

 

Head number of the devices where the data to be added to/subtracted from is stored (BIN 16 bits)

Setting 

Data

Internal Devices 

R, ZR

J

\

U

\G

Zn

Constants

K, H

Other

Bit

Word

Bit

Word

––

––

––

D

S

D

D

S

D

Command

Command

P

D

S

S

D

+,

+/

+P, P

indicates an instruction symbol of        .

S

S1

D

S

D

D

S

D

b0

5678 (BIN)

b15

b0

6912 (BIN)

b15

b0

1234 (BIN)

b15

D

S

D

S

D

Since bit 15 value is "0",  
result of operation takes a positive value.

Since bit 15 value is "1",  
result of operation takes a negative value.

K32767

+K2

(7FFF

H

)

K 32768 +K 2

K 32767

K32766

(7FFE

H

)

(8001

H

)

(FFFE

H

)

(8000

H

)

(0002

H

)