bitmask – Page 2 – Tarik Billa

What does (x ^ 0x1) != 0 mean?

October 22, 2022 by Tarik

The XOR operation (x ^ 0x1) inverts bit 0. So the expression effectively means: if bit 0 of x is 0, or any other bit of x is 1, then the expression is true. Conversely the expression is false if x == 1. So the test is the same as: if (x != 1) and … Read more

What is bit masking?

October 4, 2022 by Tarik

A mask defines which bits you want to keep, and which bits you want to clear. Masking is the act of applying a mask to a value. This is accomplished by doing: Bitwise ANDing in order to extract a subset of the bits in the value Bitwise ORing in order to set a subset of … Read more