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SXTW

Sign Extend Word sign-extends a word to the size of the register, and writes the result to the destination register.

This is an alias of SBFM. This means:

313029282726252423222120191817161514131211109876543210
1001001101000000011111RnRd
sfopcNimmrimms

64-bit

SXTW <Xd>, <Wn>

is equivalent to

SBFM <Xd>, <Xn>, #0, #31

and is always the preferred disassembly.

Assembler Symbols

<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 general-purpose source register, encoded in the "Rn" field.

<Wn>

Is the 32-bit name of the general-purpose source register, encoded in the "Rn" field.

Operation

The description of SBFM gives the operational pseudocode for this instruction.

Operational information

If PSTATE.DIT is 1:


Internal version only: isa v29.05v27.02, AdvSIMD v26.0, pseudocode v35.3v34.2.2 ; Build timestamp: 2018-06-16T092018-03-28T19:4555

Copyright © 2010-2018 ARM Limited or its affiliates. All rights reserved. This document is Non-Confidential.

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