csmstr - Omega Engineering

WRITING EXPRESSIONS
MANIPULATING BITS
MANIPULATING BITS
Crimson also provides operators to perform operations that do not treat integers as numeric
values, but instead as sequences of bits. These operators are known as bitwise operators.
AND, OR AND XOR
These three bitwise operators each produce a result in which each bit is defined to be equal to
the corresponding bits in the values on the operator’s left-hand and right-hand sides,
combined using a specific truth-table…
OPERATOR PRIORITY EXAMPLE
Bitwise AND Group 8 Data & Mask
Bitwise OR Group 9 Data | Mask
Bitwise XOR Group 10 Data ^ Mask
The table below shows the associated truth tables…
A B A & B A | B A ^ B
0 0 0 0 0
0 1 0 1 1
1 0 0 1 1
1 1 1 1 0
SHIFT OPERATORS
Crimson also provides operators to shift an integer n bits to the left or right…
OPERATOR PRIORITY EXAMPLE
Shift Left Group 5 Data > 2
Each example shifts Data two bits in the specified direction.
BITWISE NOT
Finally, Crimson provides a bitwise NOT operator to invert the sense of the bits in a value…
OPERATOR PRIORITY EXAMPLE
Bitwise NOT Group 2 ~Mask
This example produces a value where every bit is equal to the opposite of its value in Mask.
REVISION 6 PAGE 265