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UXTH

Unsigned Extend Halfword extracts a 16-bit value from a register, zero-extends it to the size of the register, and writes the result to the destination register.

This is an alias of UBFM. This means:

  • The encodings in this description are named to match the encodings of UBFM.
  • The description of UBFM gives the operational pseudocode for this instruction.

313029282726252423222120191817161514131211109876543210
0101001100000000001111RnRd
sfopcNimmrimms

32-bit

UXTH <Wd>, <Wn>

is equivalent to

UBFM <Wd>, <Wn>, #0, #15

and is always the preferred disassembly.

Assembler Symbols

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

Operation

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

Operational information

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.
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