← Home

MOV (bitmask immediate)

Move bitmask immediate value

This instruction writes a bitmask immediate value to a register.

This is an alias of ORR (immediate). This means:

313029282726252423222120191817161514131211109876543210
sf01100100Nimmrimms11111Rd
opcRn

32-bit encoding

(sf == 0 && N == 0)

MOV <Wd|WSP>, #<imm>

is equivalent to

ORR <Wd|WSP>, WZR, #<imm>

and is the preferred disassembly when !MoveWidePreferred(sf, N, imms, immr).

64-bit encoding

(sf == 1)

MOV <Xd|SP>, #<imm>

is equivalent to

ORR <Xd|SP>, XZR, #<imm>

and is the preferred disassembly when !MoveWidePreferred(sf, N, imms, immr).

Assembler Symbols

<Wd|WSP>

Is the 32-bit name of the destination general-purpose register or stack pointer, encoded in the "Rd" field.

<imm>

For the "32-bit" variant: is the bitmask immediate, encoded in "imms:immr", but excluding values which could be encoded by MOVZ or MOVN.

For the "64-bit" variant: is the bitmask immediate, encoded in "N:imms:immr", but excluding values which could be encoded by MOVZ or MOVN.

<Xd|SP>

Is the 64-bit name of the destination general-purpose register or stack pointer, encoded in the "Rd" field.

Operation

The description of ORR (immediate) gives the operational pseudocode for this instruction.

Operational Information

The description of ORR (immediate) gives the operational information for this instruction.

Version 2025.09 — Copyright © 2010-2025 Arm Limited or its affiliates.

This site is provided as a community resource and is NOT affiliated with nor endorsed by Arm Limited.