Bitwise Rotate Left '<-', '<-='

The Bitwise Rotate Left operator is similar to the Bitwise Shift Left operator, except that the MSBs (leftmost bits) are rotated back around to the LSBs (rightmost bits). Bitwise Rotate Left can be used in both variable and integer constant expressions, but not in floating-point constant expressions.

Example:

X := Y <- 4

If Y started out as:

%10000000 01110000 11111111 00110101

the Bitwise Rotate Left operator would rotate that value left by four bits, moving the original four MSBs to the four new LSBs, and setting X to:

%00000111 00001111 11110011 01011000

Bitwise Rotate Left has an assignment form, <-=, that uses the variable to its left as both the first operand and the result destination. For example,

X <-= 1     'Short form of X := X <- 1 

Here, the value of X is rotated left one bit and is stored back in X. The assignment form of Bitwise Rotate Left may also be used within expressions for intermediate results; see Intermediate Assignments.