UMADDL Unsigned multiply-add long This instruction multiplies two 32-bit register values, adds a 64-bit register value, 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. This instruction is used by the alias UMULL Ra == '11111' See below for details of when the alias is preferred. 1 0 0 1 1 0 1 1 1 0 1 0 UMADDL <Xd>, <Wn>, <Wm>, <Xa> constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer m = UInt(Rm); constant integer a = UInt(Ra); <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. <Xa> Is the 64-bit name of the third general-purpose source register holding the addend, encoded in the "Ra" field. Alias Conditions constant bits(32) operand1 = X[n, 32]; constant bits(32) operand2 = X[m, 32]; constant bits(64) operand3 = X[a, 64]; constant integer result = UInt(operand3) + (UInt(operand1) * UInt(operand2)); X[d, 64] = result<63:0>;