Syntax

CMN Wn, Wm{, shift #amount} ; 32-bit general registers

Equivalent to ADDS WZR, Wn, Wm {, shift #amount}

CMN Xn, Xm{, shift #amount} ; 64-bit general registers

Equivalent to ADDS XZR, Xn, Xm {, shift #amount}

Where:

Wn

Is the 32-bit name of the first general-purpose source register.

Wm

Is the 32-bit name of the second general-purpose source register.

amount

The value depends on the instruction variant:

32-bit general registers

The shift amount, in the range 0 to 31, defaulting to 0.

64-bit general registers

The shift amount, in the range 0 to 63, defaulting to 0.

Xn

Is the 64-bit name of the first general-purpose source register.

Xm

Is the 64-bit name of the second general-purpose source register.

shift

Is the optional shift type to be applied to the second source operand, defaulting to LSL, and can be one of LSL, LSR, or ASR.