ASRV Arithmetic shift right variable This instruction shifts a register value right by a variable number of bits, shifting in copies of its sign bit, and writes the result to the destination register. The value of the second source register modulo the register size in bits gives the number of bits by which the first source register is right-shifted. This instruction is a data-independent-time instruction as described in About PSTATE.DIT. This instruction is used by the alias ASR (register) Unconditionally The alias is always the preferred disassembly. 0 0 1 1 0 1 0 1 1 0 0 0 1 0 1 0 0 ASRV <Wd>, <Wn>, <Wm> 1 ASRV <Xd>, <Xn>, <Xm> let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let m : integer{} = UInt(Rm); let datasize : integer{} = 32 << UInt(sf); let shift_type : ShiftType = DecodeShift(op2); <Wd> Is the 32-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, encoded in the "Rn" field. <Wm> Is the 32-bit name of the second general-purpose source register holding a shift amount from 0 to 31 in its bottom 5 bits, encoded in the "Rm" field. <Xd> Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field. <Xn> Is the 64-bit name of the first general-purpose source register, encoded in the "Rn" field. <Xm> Is the 64-bit name of the second general-purpose source register holding a shift amount from 0 to 63 in its bottom 6 bits, encoded in the "Rm" field. Alias Conditions let operand2 : bits(datasize) = X{}(m); X{datasize}(d) = ShiftReg{datasize}(n, shift_type, UInt(operand2) MOD datasize); 2026-03-26 20:27:25 2026-03_rel