ABL electronic PIC Microcontrollers PIC18 ユーザーズマニュアル

Use the bitwise operators to modify the individual bits of numerical operands.

Bitwise operators associate from left to right. The only exception is the bitwise
complement operator 

~

which associates from right to left.

Note: Operator 

&

can also be the pointer reference operator. Refer to Pointers for

more information.

Bitwise operators 

&

, 

|

, and 

^

perform logical operations on appropriate pairs of

bits of their operands. For example:

0x1234 & 0x5678;       

/* equals 0x1230 */

/* because ..

0x1234 : 0001 0010 0011 0100
0x5678 : 0101 0110 0111 1000
---------------------------------

&

: 0001 0010 0011 0000

.. that is, 0x1230 */

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&

bitwise AND; returns 1 if both bits are 1, oth-
erwise returns  0

9

|

bitwise (inclusive) OR; returns 1 if either or
both bits are 1, otherwise returns 0

9

^

bitwise exclusive OR (XOR); returns 1 if the
bits are complementary, otherwise 0

10

~

bitwise complement (unary); inverts each bit

10

>>

bitwise shift left; moves the bits to the left,
see below

10

<<

bitwise shift right; moves the bits to the right,
see below

10