51 asr (arithmetic shift to the right direction), Asr (arithmetic shift to the right direction) – FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E User Manual

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS

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

Operation:

Ri >> u4

→

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

–

MSB

LSB

F F F F 0 F F F

F F 0 F F F F F

N Z V C

CCR

N Z V C

1 0 0 1

0 0 0 0

Instruction bit pattern :

1011 1000 1000 0011

Before execution

After execution