BitShift
From AutoIt Wiki
Performs a bit shifting operation. Adapted from AutoIt docs.
Contents |
[edit] Syntax
$x = BitShift(value,shift)
[edit] Parameters
| value | The number to be shifted. |
| shift | Number of bits to shift to the right (negative numbers shift left). |
[edit] Return Value
Returns the value shifted by the required number of bits. Bit operations are performed as 32-bit integers.
As a standard, shifting bits is equivalent to multiplying/dividing by an order of magnitude. That is to say, a binary number shifted n bits is equivalent to multiplying by 2^n.
[edit] Example
$x = BitShift(14, 2) ; x == 3 because 1110b right-shifted twice is 11b == 3 $y = BitShift(14, -2) ; y == 56 because 1110b left-shifted twice is 111000b == 56 $z = BitShift( 1, -31) ; z == -2147483648 because in 2's-complement notation, the ; 32nd digit from the right has a negative sign.
