ARM Cortex-M4 - Nop; No Operation

The Cortex-M4 Instruction Set
ARM DUI 0553A Copyright © 2010 ARM. All rights reserved. 3-165
ID121610 Non-Confidential
3.12.8 NOP
No Operation.
Syntax
NOP{cond}
where:
cond Is an optional condition code, see Conditional execution on page 3-18.
Operation
NOP does nothing. NOP is not necessarily a time-consuming NOP . The processor might remove it
from the pipeline before it reaches the execution stage.
Use
NOP for padding, for example to place the following instruction on a 64-bit boundary.
Condition flags
This instruction does not change the flags.
Examples
NOP ; No operation