Bitwise Operators

Six operators process numeric data as though each number is a collection of ones and zeros. For example, a Bitwise And of the number 5 and 6 (5&6) produces the result 4. The number 5 in binary form is 101. Similarly, the number 6 is 110. If you And together each pair of corresponding digits in the two binary numbers you get 100, which is the binary representation for the number 4. That is,

101    5
& 110    6
100    4

Although DScript uses floating-point notation to represent all numbers, when you perform a bitwise operation the operands are first converted to 32-bit integers.

Each bitwise operator is described below.

Bitwise And x&y

Each digit in the result is a 1 if both corresponding digits in x and y are 1.

Bitwise Or x|y

Each digit in the result is a 1 if either corresponding digit in x or y is 1.

Bitwise Exclusive Or x~y

Each digit in the result is a 1 if the corresponding digits in x and y are different.

Bitwise Not ~x

Inverts all bits in x. That is, Bitwise Not changes all zeros in x to ones and all ones to zero.

Left Shift x<<y

Moves all digits in x left by y digits. Bits shifted off the left end are lost.

Right Shift x>>y

Moves all digits in x right by y digits. Bits shifted off the right end are lost. If x is positive, zeros are shifted in on the left. If x is negative, ones are shifted in.

Zero-Fill Right Shift x>>>y

Same as Right Shift except that zeros are shifted in on the left regardless of the sign of x.