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ARM Compiler armasm User Guide : DUP (scalar, element)

DUP (scalar, element)

Duplicate vector element to scalar.

This instruction is used by the alias MOV (scalar).

Syntax

DUP Vd, Vn.T[index]

Where:

V

Is the destination width specifier, and can be one of the values shown in Usage.

d

Is the number of the SIMD and FP destination register.

T

Is the element width specifier, and can be one of the values shown in Usage.

Vn

Is the name of the SIMD and FP source register.

index

Is the element index, in the range shown in Usage.

Usage

The following table shows the valid specifier combinations:

Table 19-2 DUP (Scalar) specifier combinations

V T index
B B to 15
H H 0 to 7
S S 0 to 3
D D 0 or 1
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