MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE Reference page 128

Floating-point numbers are converted to integers by discarding any digits after the decimal point.
Positive integers are converted to an unsigned hex value with a maximum value of 4294967295 or
0xFFFFFFFF; values larger than the maximum have their most significant digits discarded when
they are converted so the value is still 32-bit. Negative numbers are converted to an unsigned hex
value via the two's complement notation, with the minimum being -2147483648 or
0x800000000; numbers less than the minimum are converted to two's complement with greater
precision and also have the most significant digits discarded.
For more information, see
Example
The following example converts -1 to a 32-bit integer and shifts it 1 bit to the right:
var x:Number = -1 >>> 1;
trace(x); // output: 2147483647
This is because -1 decimal is 11111111111111111111111111111111 binary (thirty-two 1's),
and when you shift right (unsigned) by 1 bit, the least significant (rightmost) bit is discarded, and
the most significant (leftmost) bit is filled with a 0. The result is
01111111111111111111111111111111 binary, which represents the 32-bit integer
2147483647.
See also
>>= (bitwise right shift and assignment)
>>>= (bitwise unsigned right shift and assignment)
Availability
Flash Player 5.
Usage
expression1 >>>= expression2
Parameters
expression1
expression2
Returns
A 32-bit integer.
Description
Operator (bitwise compound assignment); performs an unsigned bitwise right-shift operation
and stores the contents as a result in
A >>>= B
A = (A >>> B)
For more information, see
See also
>>> (bitwise unsigned right shift)
128 Chapter 5: ActionScript Core Language Elements
"Operator precedence and associativity" on page
A number or expression to be shifted left.
A number or expression that converts to an integer from 0 to 31.
expression1
"Operator precedence and associativity" on page
. The following two expressions are equivalent:
,
>>= (bitwise right shift and assignment)
32.
32.