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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.52 ASR2 (Arithmetic Shift to the Right Direction)
Makes an arithmetic right shift of the word data in "Ri" by "{u4 + 16}" bits, stores the
result to "Ri".
■ ASR2 (Arithmetic Shift to the Right Direction)
Assembler format: ASR2 #u4, Ri
Operation: Ri >> {u4 + 16} → Ri
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.
Execution cycles: 1 cycle
Instruction format:
Example: ASR2 #8, R3
NZVC
CC–C
MSB LSB
10111001 u4 Ri
R3 R3
FFFF FFF0F0FF FFFF
NZVC
CCR CCR
NZVC
10010000
Instruction bit pattern : 1011 1001 1000 0011
Before execution After execution