XOR

Returns the bitwise exclusive OR of two or more inputs.

Signature

     ┌─────────┐
IN1 ─┤         │
IN2 ─┤   XOR   ├─ OUT
IN3 ─┤         │
     └─────────┘

FUNCTION XOR : ANY_BIT
  VAR_INPUT
    IN1 : ANY_BIT;
    IN2 : ANY_BIT;
    (* ... additional inputs ... *)
  END_VAR
END_FUNCTION

The return type matches the input type. XOR accepts BOOL, BYTE, WORD, DWORD, LWORD. All inputs must share the same type.

Inputs

Name

Type

Description

IN1

ANY_BIT

The first operand.

IN2

ANY_BIT

The second operand.

Outputs

Name

Type

Description

Return value

ANY_BIT

Each bit set in an odd number of the inputs. Same type as the inputs.

Description

On BOOL inputs, returns TRUE when an odd number of the inputs are TRUE: for two inputs, when exactly one is. On BYTE, WORD, DWORD and LWORD inputs, each bit of the result is set when the same bit is set in an odd number of the inputs. XOR(a, b) is the functional form of the XOR operator: a XOR b. Both forms are equivalent, and XOR(a, b, c) is a XOR b XOR c.

Example

result := XOR(WORD#16#F0F0, WORD#16#FF00);   (* result = 16#0FF0 *)
result := WORD#16#F0F0 XOR WORD#16#FF00;     (* operator form *)
result := XOR(WORD#16#F0F0, WORD#16#FF00, WORD#16#00FF);   (* result = 16#0F0F *)

See Also

References