20.248 UMOV (vector)

Unsigned Move vector element to general-purpose register.

This instruction is used by the alias MOV (to general).

Syntax

UMOV Wd, Vn.Ts[index] ; 32-bit

UMOV Xd, Vn.Ts[index] ; 64-bit

Where:

Wd
Is the 32-bit name of the general-purpose destination register.
Ts

Is an element size specifier:

32-bit
Can be one of B, H or S.
64-bit
Must be D.
index

The value depends on the instruction variant:

32-bit
Is the element index, in the range shown in Usage.
64-bit
Is the element index and can be either 0 or 1.
Xd
Is the 64-bit name of the general-purpose destination register.
Vn
Is the name of the SIMD and FP source register.

Usage

Unsigned Move vector element to general-purpose register. This instruction reads the unsigned integer from the source SIMD and FP register, zero-extends it to form a 32-bit or 64-bit value, and writes the result to the destination general-purpose 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.

Table 20-103 UMOV (32-bit) specifier combinations

Ts index
B 0 to 15
H 0 to 7
S 0 to 3
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