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The gcc builtin uses a lookup table but it is possible to do better.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36041 - existing gcc bug for
improving the builtin popcount.
https://groups.google.com/group/comp.arch/msg/ba28c5dbd47a3bba?dmode=source&outp
ut=gplain&noredirect&pli=1 - this post by Terje Mathisen describes the technique
Original issue reported on code.google.com by dbremner@gmail.com on 17 Oct 2012 at 2:02
The text was updated successfully, but these errors were encountered:
Original issue reported on code.google.com by
dbremner@gmail.com
on 17 Oct 2012 at 2:02The text was updated successfully, but these errors were encountered: