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3.7.3. DMB

Data Memory Barrier.

Syntax

DMB

Operation

DMB acts as a data memory barrier. It ensures that all explicit memory accesses that appear in program order before the DMB instruction are observed before any explicit memory accesses that appear in program order after the DMB instruction. DMB does not affect the ordering of instructions that do not access memory.

Restrictions

There are no restrictions.

Condition flags

This instruction does not change the flags.

Examples

    DMB  ; Data Memory Barrier 

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