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MOV (scalar)

Move vector element to scalar. This instruction duplicates the specified vector element in the SIMD&FP source register into a scalar, and writes the result to the SIMD&FP destination register.

Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.

This is an alias of DUP (element). This means:

  • The encodings in this description are named to match the encodings of DUP (element).
  • The description of DUP (element) gives the operational pseudocode for this instruction.

313029282726252423222120191817161514131211109876543210
01011110000imm5000001RnRd

MOV <V><d>, <Vn>.<T>[<index>]

is equivalent to

DUP <V><d>, <Vn>.<T>[<index>]

and is always the preferred disassembly.

Assembler Symbols

<V> Is the destination width specifier, encoded in imm5:
imm5 <V>
x0000 RESERVED
xxxx1 B
xxx10 H
xx100 S
x1000 D
<d>

Is the number of the SIMD&FP destination register, encoded in the "Rd" field.

<Vn>

Is the name of the SIMD&FP source register, encoded in the "Rn" field.

<T> Is the element width specifier, encoded in imm5:
imm5 <T>
x0000 RESERVED
xxxx1 B
xxx10 H
xx100 S
x1000 D
<index> Is the element index encoded in imm5:
imm5 <index>
x0000 RESERVED
xxxx1 imm5<4:1>
xxx10 imm5<4:2>
xx100 imm5<4:3>
x1000 imm5<4>

Operation

The description of DUP (element) 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.