Function Reference


BitShift

Performs a bit shifting operation.

BitShift ( value, shift )

Parameters

value The number to be shifted.
shift Number of bits to shift to the right (negative numbers shift left).

Return Value

Returns the value shifted by the required number of bits.
Bit operations are performed as 32-bit integers.

Remarks

Remember hex notation can be used for numbers.
Right shifts are equivalent to halving; left shifts to doubling.

Related

BitAND, BitNOT, BitOR, BitRotate, BitXOR, Hex

Example

#include <MsgBoxConstants.au3>

Example()

Func Example()
    ; Note: "b" is the symbol for byte.

    ; Assign a Local variable the bitwise left-shift operation of 2.
    Local $iBitShift1 = BitShift(2, -1) ; 2 = 0010b left-shifted once -> 4 = 0100b

    ; Note: It is equivalent to do this: BitRotate(2, 1)

    ; Display the result.
    MsgBox($MB_SYSTEMMODAL, "", $iBitShift1)

    ; Assign a Local variable the bitwise right-shift operation of 1.
    Local $iBitShift2 = BitShift(1, 1) ; 1 = 0001b right-shifted once -> 0 = 0000b

    ; Display the result.
    MsgBox($MB_SYSTEMMODAL, "", $iBitShift2)

    ; Assign a Local variable the bitwise left-shift operation of 14.
    Local $iBitShift3 = BitShift(14, -2) ; 14 = 1110b left-shifted twice -> 56 = 0011 1000b

    ; Display the result.
    MsgBox($MB_SYSTEMMODAL, "", $iBitShift3)

    ; Assign a Local variable the bitwise
    Local $iBitShift4 = BitShift(1, -31)
    ;1 = 0001b right-shifted 31 times -> -2147483648 (32 bits) = 1000 0000 0000 0000 0000 0000 0000 0000b

    ;Note: in 2's-complement notation, the 32nd digit from the right has a negative sign.

    ; Display the result.
    MsgBox($MB_SYSTEMMODAL, "", $iBitShift4)
EndFunc   ;==>Example