RMIF Rotate, mask insert flags This instruction performs a rotation right of a value held in a general-purpose register by an immediate value, and then inserts a selection of the bottom four bits of the result of the rotation into the PSTATE flags, under the control of a second immediate mask. 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. 1 0 1 1 1 0 1 0 0 0 0 0 0 0 0 1 0 RMIF <Xn>, #<shift>, #<mask> if !IsFeatureImplemented(FEAT_FlagM) then UNDEFINED; constant integer imm = UInt(imm6); constant bits(4) flagmask = mask; constant integer n = UInt(Rn); <Xn> Is the 64-bit name of the general-purpose source register, encoded in the "Rn" field. <shift> Is the shift amount, in the range 0 to 63, defaulting to 0 and encoded in the "imm6" field, <mask> Is the flag bit mask, an immediate in the range 0 to 15, which selects the bits that are inserted into the NZCV condition flags, encoded in the "mask" field. constant bits(64) reg = X[n, 64]; constant bits(4) flags = (reg:reg)<imm+3:imm>; if flagmask<3> == '1' then PSTATE.N = flags<3>; if flagmask<2> == '1' then PSTATE.Z = flags<2>; if flagmask<1> == '1' then PSTATE.C = flags<1>; if flagmask<0> == '1' then PSTATE.V = flags<0>;