Lsr (Logical Shift To The Right Direction) - Fujitsu FR Family Instruction Manual

CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.48

LSR (Logical Shift to the Right Direction)

Makes a logical right shift of the word data in "Ri" by "u4" bits, stores the result to "Ri".
■ LSR (Logical Shift to the Right Direction)
Assembler format: LSR #u4, Ri
Ri >> u4 → Ri
Operation:
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: Unchanged
C: Holds the bit value shifted last. Cleared when the shift amount is "0".
Execution cycles: 1 cycle
Instruction format:
Example: LSR #8, R3
142
N Z V C
C C – C
MSB
1 0 1 1
Instruction bit pattern :
1011 0000 1000 0011
R3
F F F F F F F F
N Z V C
CCR
0 0 0 0
Before execution
0 0 0 0 u4
LSB
Ri
R3
0 0 F F F F F F
N Z V C
CCR
0 0 0 1
After execution