You copied the Doc URL to your clipboard.

16.79 LSR (register)

Logical Shift Right (register).

This instruction is an alias of LSRV.

Syntax

LSR Wd, Wn, Wm ; 32-bit general registers

Equivalent to LSRV Wd, Wn, Wm.

LSR Xd, Xn, Xm ; 64-bit general registers

Equivalent to LSRV Xd, Xn, Xm.

Where:

Wd

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

Wn

Is the 32-bit name of the first general-purpose source register.

Wm

Is the 32-bit name of the second general-purpose source register holding a shift amount from 0 to 31 in its bottom 5 bits.

Xd

Is the 64-bit name of the general-purpose destination register.

Xn

Is the 64-bit name of the first general-purpose source register.

Xm

Is the 64-bit name of the second general-purpose source register holding a shift amount from 0 to 63 in its bottom 6 bits.

Operation

Logical Shift Right (register) shifts a register value right by a variable number of bits, shifting in zeros, and writes the result to the destination register. The remainder obtained by dividing the second source register by the data size defines the number of bits by which the first source register is right-shifted.

Rd = LSR(Rn, Rm), where R is either W or X.

Was this page helpful? Yes No