Re: Count bits

• Subject: Re: Count bits
• From: Holger Bettag <email@hidden>
• Date: Mon, 28 Nov 2005 17:12:11 +0100 (MET)
• Delivered-to: email@hidden
• Delivered-to: email@hidden

The vectorized version from Apple's pages is potentially the fastest, if
you can control the surrounding code and keep overhead low (moving data
between scalar and vector registers is expensive, because you have to go
through memory). Here are a few more scalar alternatives:

http://graphics.stanford.edu/~seander/bithacks.html

  Holger
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