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ARM Compiler armasm User Guide : NOP

NOP

No Operation.

This instruction is an alias of HINT.

The equivalent instruction is HINT #0

Usage

No Operation does nothing. This instruction can be used for instruction alignment purposes.

Note

The timing effects of including a NOP instruction in a program are not guaranteed. It can increase execution time, leave it unchanged, or even reduce it. Therefore, NOP instructions are not suitable for timing loops.