ARM Compiler toolchain Assembler Reference: CN

The CN directive defines a name for a coprocessor register.

name CN expr

where:

name: is the name to be defined for the coprocessor register. name cannot be the same as any of the predefined names.
expr: evaluates to a coprocessor register number from 0 to 15.

Use CN to allocate convenient names to registers, to help you remember what you use each register for.

Avoid conflicting uses of the same register under different names.

The names c0 to c15 are predefined.

power    CN  6        ; defines power as a symbol for
                      ; coprocessor register 6

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