How to set and clear different bits with a single line of code (C)

Question

data |= (1 << 3) sets bit (3) without disrupting other bits. data &= ~(1 << 4) resets bit (4) without disrupting other bits. How can I

Answer 1

It's not possible in a single instruction. This is because there are 3 possible operations you need to do on the different bits:

• Set them (bit 3)
• Clear them (bit 4)
• Leave them alone (all the other bits)

How can you select from one of three possibilities with a bitmask made up of binary digits?

Of course, you can do it with one line e.g:

data = (data | (1 << 3)) & ~(1 << 4)