CMP (immediate) Compare (immediate) This instruction subtracts an optionally-shifted immediate value from a register value. It updates the condition flags based on the result, and discards the result. If PSTATE.DIT is 1: The execution time of this instruction is independent of: The values of the data supplied in any of its registers. The values of the NZCV flags. The response of this instruction to asynchronous exceptions does not vary based on: The values of the data supplied in any of its registers. The values of the NZCV flags. SUBS (immediate) 1 1 1 0 0 0 1 0 1 1 1 1 1 0 CMP <Wn|WSP>, #<imm>{, <shift>} SUBS WZR, <Wn|WSP>, #<imm>{, <shift>} Unconditionally 1 CMP <Xn|SP>, #<imm>{, <shift>} SUBS XZR, <Xn|SP>, #<imm>{, <shift>} Unconditionally <Wn|WSP> Is the 32-bit name of the source general-purpose register or stack pointer, encoded in the "Rn" field. <imm> Is an unsigned immediate, in the range 0 to 4095, encoded in the "imm12" field. <shift> Is the optional left shift to apply to the immediate, defaulting to LSL #0 and sh <shift> 0 LSL #0 1 LSL #12 <Xn|SP> Is the 64-bit name of the source general-purpose register or stack pointer, encoded in the "Rn" field.