Editing DEC Alpha (section)

===Count Extensions (CIX)===
Count Extensions (CIX) is an extension to the architecture which introduces three instructions for counting bits. These instructions are categorized as integer arithmetic instructions. They were first implemented on the [[Alpha 21264#Alpha 21264A|Alpha 21264A]] (EV67).

{| class="wikitable"
|-
! width="120" | Mnemonic
! width="360" | Instruction
|-
| <code>CTLZ</code>
| Count Leading Zero
|-
| <code>CTPOP</code>
| Count Population
|-
| <code>CTTZ</code>
| Count Trailing Zero
|-
|}