#bitwise or

[facingissuesonit]

Java : Bitwise Logical Operators

Java : Bitwise Logical Operators

Java supports several bitwise operators, which can be applied to the integer types, long, int, short, char, and byte. These Bitwise operator works on bits and performs the bit-by-bit operation.

For Example: Assume if a = 60 and b = 13; now in the binary format they will define follows:

a = 0011 1100 b = 0000 1101 ----------------- a&b = 0000 1100 a|b = 0011 1101 a^b = 0011 0001 ~a = 1100 0011

H…

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[facingissuesonit]

Java : Bitwise Logical Operators

Java : Bitwise Logical Operators

Java supports several bitwise operators, which can be applied to the integer types, long, int, short, char, and byte. These Bitwise operator works on bits and performs the bit-by-bit operation.

For Example: Assume if a = 60 and b = 13; now in the binary format they will define follows:

a = 0011 1100 b = 0000 1101 ----------------- a&b = 0000 1100 a|b = 0011 1101 a^b = 0011 0001 ~a = 1100 0011

H…

View On WordPress

[tymkrs]

Is the pipe a delimiter or bitwise OR

A few days ago I asked a question about the following snippet of code:

"For the Propeller folks out there: "ctra := %01001 << 26 | fb_pin << 9 | rf_pin" - is the pipe symbol a delimiter or bitwise OR operator?"

My initial inclination was to say, bitwise OR until I saw that the CTRA mode it was calling was %01001.  And according to the table in the Parallax manual, this wasn't a logic based counter mode, it was a POS detector with feedback mode:

But, I had to clarify and make sure.  So I asked and RaivisR said bitwise OR, as did Whisker as did RoyEltham.

So why is it bitwise OR?

01001 goes in the uppermost 5 bits

fb_pin and rf_pin are just setting PIN A & B

So the 3 values are OR'd together but they occupy different bit ranges so they are not going to change each other, they'll just fill in the result with the combination.

Example: 

If you do this:     %10100000 | %00001010 

Then you will get %10101010

which is the same as this: %1010 << 4 | %1010

because %1010 << 4 = %10100000

and %1010 is the same as %00001010

This method is used to set the mode and pins for the counters in a quicker fashion.

Thought that was a cool enough reason to show it on the blog!

@atdiy/@tymkrs