Fujitsu CM71-00101-5E User Manual
72
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.1
ADD (Add Word Data of Source Register to Destination
Register)
Register)
Adds word data in "Rj" to word data in "Ri", stores results to "Ri".
■
ADD (Add Word Data of Source Register to Destination Register)
Assembler format:
ADD Rj, Ri
Operation:
Ri + Rj
→
Ri
Flag change:
N :
Set when the MSB of the operation result is "1", cleared when the MSB is "0".
Z :
Set when the operation result is "0", cleared otherwise.
V :
Set when an overflow has occurred as a result of the operation, cleared otherwise.
C :
Set when a carry has occurred as a result of the operation, cleared otherwise.
Execution cycles:
1 cycle
Instruction format:
Example:
ADD R2, R3
N
Z
V
C
C
C
C
C
MSB
LSB
1
0
1
0
0
1
1
0
Rj
Ri
R2
R
3
1 2
3
4
5 6 7
8
8
7 6 5
4
3
2 1
N Z V C
CCR
R2
R
3
CCR
0 0 0 0
N Z V C
1 0 0 0
9 9 9 9
9 9 9 9
1 2
3
4
5 6 7
8
Before exec
u
tion
After exec
u
tion
In
s
tr
u
ction
b
it p
a
ttern : 1010 0110 0010 0011