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380
Symbol Math Instructions
Section 3-11
Description
+CL(403) adds the binary values in Au and Au+1, Ad and Ad+1, and CY and
outputs the result to R.
Flags
Precautions
When +CL(403) is executed, the Error Flag will turn OFF.
If as a result of the addition, the content of R, R+1 is 00000000 hex, the
Equals Flag will turn ON.
If the addition results in a carry, the Carry Flag will turn ON.
If the result of adding two positive numbers and CY is negative (in the range
80000000 to FFFFFFFF hex), the Overflow Flag will turn ON.
If the result of adding two negative numbers and CY is positive (in the range
00000000 to 7FFFFFFF hex), the Underflow Flag will turn ON.
If as a result of the addition, the content of the leftmost bit of R+1 is 1, the
Negative Flag will turn ON.
Note To clear the Carry Flag (CY), execute the Clear Carry (CLC(041)) instruction.
Examples
When CIO 000000 is ON, D00201, D00200, D00211, D00210, and CY will be
added as 8-digit signed binary values, and the result will be output to D00221
and D00220.
Au+1
Ad+1
R+1
CY
+
Au
Ad
R
CY
(Signed binary)
(Signed binary)
(Signed binary)
CY will turn
ON when there
is a carry.
Name
Label
Operation
Error Flag
ER
OFF
Equals Flag
=
ON when the result is 0.
OFF in all other cases.
Carry Flag
CY
ON when the results in a carry.
OFF in all other cases.
Overflow Flag
OF
ON when the result of adding two positive numbers and
CY is in the range 80000000 to FFFFFFFF hex.
OFF in all other cases.
Underflow Flag
UF
ON when the result of adding two negative numbers and
CY is in the range 00000000 to 7FFFFFFF hex.
OFF in all other cases.
Negative Flag
N
ON when the leftmost bit of the result is 1.
OFF in all other cases.
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...