Asr (Arithmetic Shift To The Right Direction) - Fujitsu FR Family Instruction Manual

7.51

ASR (Arithmetic Shift to the Right Direction)

Makes an arithmetic right shift of the word data in "Ri" by "u4" bits, stores the result to
"Ri".
■ ASR (Arithmetic Shift to the Right Direction)
Assembler format: ASR #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: ASR #8, R3
N Z V C
C C – C
MSB
1 0 1 1
Instruction bit pattern :
1011 1000 1000 0011
R3
F F 0 F F F F F
N Z V C
CCR 0 0 0 0
Before execution
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
1 0 0 0 u4
LSB
Ri
R3
F F F F 0 F F F
N Z V C
CCR 1 0 0 1
After execution
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