St (Store Word Data In Register To Memory) - Fujitsu FR Family Instruction Manual

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.
■ ST (Store Word Data in Register to Memory)
Assembler format: ST Ri, @ (R15, udisp6)
Ri → (R15 + u4 × 4)
Operation:
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: a cycle(s)
Instruction format:
Example: ST R3, @ (R15, 4)
168
N Z V C
– – – –
MSB
0 0 0
Instruction bit pattern :
R3 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8
R15
Memory
12345678
x x x x x x x x
1234567C
Before execution
1 0 0 1 1
0001 0011 0001 0011
LSB
u4 Ri
R3 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8
R15
Memory
12345678
1234567C 8 7 6 5 4 3 2 1
After execution