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

7.69

ST (Store Word Data in Register to Memory)

Loads the word data in "Ri" to memory address "Rj".
■ ST (Store Word Data in Register to Memory)
Assembler format: ST Ri, @Rj
Ri → (Rj)
Operation:
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: a cycle(s)
Instruction format:
Example: ST R3, @R2
N Z V C
– – – –
MSB
0 0 0
Instruction bit pattern : 0001 0100 0010 0011
R2
1 2 3 4 5 6 7 8
R3
8 7 6 5 4 3 2 1
Memory
12345678 x x x x x x x x
Before execution
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
1 0 1 0 0
LSB
Rj Ri
R2
1 2 3 4 5 6 7 8
R3 8 7 6 5 4 3 2 1
Memory
12345678 8 7 6 5 4 3 2 1
After execution
165