The RN directive defines a name for a specified register.
name RN expr
is the name to be assigned to the register. name cannot be the same as any of the predefined names.
evaluates to a register number from 0 to 15.
Use RN to allocate convenient names to registers, to help you to remember what you use each register for. Be careful to avoid conflicting uses of the same register under different names.
regname RN 11 ; defines regname for register 11 sqr4 RN r6 ; defines sqr4 for register 6