Arm Compiler armasm User Guide : 19.56 MOV (scalar)

19.56 MOV (scalar)

Move vector element to scalar.

This instruction is an alias of DUP (element).

The equivalent instruction is DUP Vd, Vn.T[index].

Syntax

MOV 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.
Vn: Is the name of the SIMD and FP source register.
T: Is the element width specifier, and can be one of the values shown in Usage.
index: Is the element index, in the range shown in Usage.

Usage

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

The following table shows the valid specifier combinations:

Table 19-10 MOV (Scalar) specifier combinations

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

Related references

19.16 DUP (scalar, element)

19.1 A64 SIMD scalar instructions in alphabetical order

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