Here's what I've done:
93 | 199
which returns
223
I understand that this is because 0b1011101 | 0b11000111
is 0b11011111
However, suppose I want to do the reverse operation. How do I get 0b1011101
from a bitwise operation between 0b11000111
and 0b11011111
?
You can't get an unambiguous answer in the general case. If C=A|B
, then wherever you have a 1 in C and a 1 in A, the corresponding bit of B could have been either 0 or 1.
In your example, 93|199=223, but 92|199 is also 223. So, given 223 and 199 there's no single answer (in fact, in this example there are 32 possible answers).