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ARM Compiler armasm User Guide : DMB

DMB

Data Memory Barrier.

Syntax

DMB option|#imm

Where:

option

Specifies the limitation on the barrier operation. Values are:

imm

Is a 4-bit unsigned immediate, in the range 0 to 15.

Usage

Data Memory Barrier is a memory barrier that ensures the ordering of observations of memory accesses, see Data Memory Barrier in the ARMv8-A Architecture Reference Manual.

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