Fujitsu CM71-00101-5E User Manual
168
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.72
ST (Store Word Data in Register to Memory)
Loads the word data in "Ri" to memory address "(R15 + u4 × 4)".
The value "u4" is an unsigned calculation.
The value "u4" is an unsigned calculation.
■
ST (Store Word Data in Register to Memory)
Assembler format:
ST Ri, @ (R15, udisp6)
Operation:
Ri
→
(R15 + u4 × 4)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles:
a cycle(s)
Instruction format:
Example:
ST R3, @ (R15, 4)
N
Z
V
C
–
–
–
–
MSB
LSB
0
0
0
1
0
0
1
1
u4
Ri
12345678
R3
R3
8 7 6 5
4 3 2 1
8 7 6 5
4 3 2 1
12345678
1234567C
1234567C
1 2 3 4
5 6 7 8
8 7 6 5
4 3 2 1
R15
1 2 3 4
5 6 7 8
R15
Instruction bit pattern :
0001 0011 0001 0011
x x x x
x x x x
Memory
Memory
Before execution
After execution