Omron C200HE ユーザーズマニュアル

In the case below, 1,799,100,099 + (–282,751,929) = 1,516,348,100
(6B3C167D + EF258C47 = 5A61A2C4). Neither OF nor UF are turned ON.

Au + 1 : LR 21

Au : LR 20

Ad + 1 : DM 0011

Ad : DM 0010

6

B

3

C

1

6

7

D

E

F

2

5

8

C

4

7

0

R + 1 : DM 0021

R : DM 0020

A

2

C

4

5

A

6

1

0

CY (Cleared with CLC(41))

UF (SR 25405)

0

OF (SR 25404)

Note The status of the CY flag can be ignored when adding signed binary data since it

is relevant only in the addition of normal hexadecimal values.

Mi: First minuend word (binary)

IR, SR, AR, DM, HR, TC, LR

Su: First subtrahend word (binary)

IR, SR, AR, DM, HR, TC, LR

R: First result word

IR, SR, AR, DM, HR, LR

SBBL(––)

Mi

Su

R

@SBBL(––)

Mi

Su

R

Mi and Mi+1 must be in the same data area, as must Su and Su+1, and R and
R+1.

When the execution condition is OFF, SBBL(––) is not executed. When the
execution condition is ON, SBBL(––) subtracts CY and the eight-digit value in Su
and Su+1 from the eight-digit value in Mi and Mi+1, and places the result in R and
R+1. If the result is negative, CY is set and the 2’s complement of the actual re-
sult is placed in R+1 and R. Use the DOUBLE 2’s COMPLEMENT instructions to
convert the 2’s complement to the true result.

Mi + 1

Mi

Su + 1

Su

R + 1

R

–

CY

CY

SBBL(––) can also be used to subtract signed binary data. The overflow and un-
derflow flags (SR 25404 and SR 25405) indicate whether the result has exceed-
ed the lower or upper limits of the 32-bit signed binary data range. Refer to page
27 for details on signed binary data.