I want to convert this to C:


rECX is the name of the (32bit unsigned int)register variable. It should be simple, but I can't figure out the proper pointer magic :/

  • *(unsigned char*)&rECX >>= 1; I knew it was easy :)
    – user3590
    Jan 8, 2014 at 19:42
  • 1
    Folks, please don't forget to vote up questions, too! Although this would likely be more fitting for SO, it's a valid question that internauts may find useful. Voting will help it pop up more prominently and reward the asker.
    – 0xC0000022L
    Jan 9, 2014 at 2:12

1 Answer 1


rECX = (rECX & 0xFFFFFF00) | ((rECX & 0xFF) >> 1)

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