Mikroelektronika MIKROE-738 Datenbogen

mikroC PRO for PIC32

MikroElektronika

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0x1234 | 0x5678;       /* equals 0x567C */

0x1234 ^ 0x5678;       /* equals 0x444C */

~ 0x1234;              /* equals 0xEDCB */

Note: Operator 

&

 can also be a pointer reference operator. Refer to Pointers for more information.

Bitwise Shift Operators

Binary operators 

<< 

and 

>>

 move the bits of the left operand by a number of positions specified by the right operand, 

to the left or right, respectively. Right operand has to be positive.

With shift left (

<<

), far left bits are discarded and “new” bits on the right are assigned zeroes. Thus, shifting unsigned 

operand to the left by n positions is equivalent to multiplying it by 2n if all discarded bits are zero. This is also true for 

signed operands if all discarded bits are equal to a sign bit.

000001 <<  5;    /* equals 000040 */

0x3801 <<  4;    /* equals 0x8010, overflow! */

With shift right (

>>

), far right bits are discarded and the “freed” bits on the left are assigned zeroes (in case of unsigned 

operand) or the value of a sign bit (in case of signed operand). Shifting operand to the right by n positions is equivalent 

to dividing it by 2n.

0xFF56  >>  4;    /* equals 0xFFF5 */

0xFF56u >>  4;    /* equals 0x0FF5 */

Bitwise vs. Logical

Do not forget of the principle difference between how bitwise and logical operators work. For example:

0222222 &  0555555;    /* equals 000000 */

0222222 && 0555555;    /* equals 1 */

~ 0x1234;              /* equals 0xEDCB */

! 0x1234;              /* equals 0 */