UMNEGL Unsigned multiply-negate long This instruction multiplies two 32-bit register values, negates the product, and writes the result to the 64-bit destination register. 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. UMSUBL 1 0 0 1 1 0 1 1 1 0 1 1 1 1 1 1 1 UMNEGL <Xd>, <Wn>, <Wm> UMSUBL <Xd>, <Wn>, <Wm>, XZR Unconditionally <Xd> Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field. <Wn> Is the 32-bit name of the first general-purpose source register holding the multiplicand, encoded in the "Rn" field. <Wm> Is the 32-bit name of the second general-purpose source register holding the multiplier, encoded in the "Rm" field.