RDVL Read multiple of vector register size to scalar register Multiply the current vector register size in bytes by an immediate in the range -32 to 31 and place the result in the 64-bit destination general-purpose register. Green False True 0 0 0 0 0 1 0 0 1 0 1 1 1 1 1 1 0 1 0 1 0 RDVL <Xd>, #<imm> if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer d = UInt(Rd); constant integer imm = SInt(imm6); <Xd> Is the 64-bit name of the destination general-purpose register, encoded in the "Rd" field. <imm> Is the signed immediate operand, in the range -32 to 31, encoded in the "imm6" field. CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer len = imm * (VL DIV 8); X[d, 64] = len<63:0>;