3.14 Compiler and
processor support for bit-banding
The compiler supports bit-banding for processors that provide the feature.
The compiler supports bit-banding in the following ways:
__attribute((bitband)) language
extension.
--bitband command-line option.
Bit-banding is a feature of the Cortex-M3 and Cortex-M4 processors
(--cpu=Cortex-M3 and --cpu=Cortex-M4)
and some derivatives (for example, --cpu=Cortex-M3-rev0).
This functionality is not available on other ARM processors.
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