title: How get two's complement of a register value in ARM?
body: <p>Say I have a 32 bit signed int in register v1. I want to get the two's complement of this value to store in another register v2. In normal math that means I need to flip all 32 bits and then add 1.</p>
  
  <p>How do I flip the bits?</p>
  
  <p>Thanks in advance.</p>