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EXTR

Extract register from pair of registers.

This instruction is used by the alias ROR (immediate).

Syntax

EXTR  Wd, Wn, Wm, #lsb    ; 32-bit general registers
EXTR  Xd, Xn, Xm, #lsb    ; 64-bit general registers

Where:

Wd

Is the 32-bit name of the general-purpose destination register, in the range 0 to 31.

Wn

Is the 32-bit name of the first general-purpose source register, in the range 0 to 31.

Wm

Is the 32-bit name of the second general-purpose source register, in the range 0 to 31.

lsb

The value depends on the instruction variant:

32-bit general registers

Is the least significant bit position from which to extract, in the range 0 to 31.

64-bit general registers

Is the least significant bit position from which to extract, in the range 0 to 63.

Xd

Is the 64-bit name of the general-purpose destination register, in the range 0 to 31.

Xn

Is the 64-bit name of the first general-purpose source register, in the range 0 to 31.

Xm

Is the 64-bit name of the second general-purpose source register, in the range 0 to 31.