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

7.47

LSR (Logical Shift to the Right Direction)

Make a logical right shift of the word data in "Ri" by "Rj" bits, store the result to "Ri".
Only the lower 5 bits of "Rj", which designates the size of the shift, are valid and the
shift range is 0 to 31 bits.
■ LSR (Logical Shift to the Right Direction)
Assembler format: LSR Rj, Ri
Ri > > Rj → 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 R2, R3
N Z V C
C C – C
MSB
1 0 1 1
R2
0 0 0 0 0 0 0 8
R3
F F F F F F F F
N Z V C
CCR 0 0 0 0
Before execution
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
0 0 1 0 Rj
LSB
Ri
R2
0 0 0 0 0 0 0 8
R3
0 0 F F F F F F
N Z V C
CCR 0 0 0 1
After execution
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