You copied the Doc URL to your clipboard.

CMP (immediate)

Compare (immediate).

This instruction is an alias of SUBS (immediate).

The equivalent instruction is SUBS WZR, Wn|WSP, #imm {, shift}.

Syntax

CMP Wn|WSP, #imm{, shift} ; 32-bit

CMP Xn|SP, #imm{, shift} ; 64-bit

Where:

Wn|WSP
Is the 32-bit name of the source general-purpose register or stack pointer.
Xn|SP
Is the 64-bit name of the source general-purpose register or stack pointer.
imm
Is an unsigned immediate, in the range 0 to 4095.
shift
Is the optional left shift to apply to the immediate, defaulting to LSL #0, and can be either LSL #0 or LSL #12.

Operation

Compare (immediate) subtracts an optionally-shifted immediate value from a register value. It updates the condition flags based on the result, and discards the result.

Rn - shift(imm), where R is either W or X.

Was this page helpful? Yes No