[Bug middle-end/36041] Speed up builtin_popcountll

[intvnut at gmail dot com]

------- Comment #2 from intvnut at gmail dot com  2008-04-25 00:39 -------
When run on my Opteron 280 system, the four separate implementations give the
following run times:

popcount64_1 = 13130000 clocks
popcount64_2 = 6480000 clocks
popcount64_3 = 3740000 clocks
popcount64_4 = 5490000 clocks

As one can see, the popcount64_3 implementation is over 3.5x the speed of the
__builtin_popcountll implementation.


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intvnut at gmail dot com changed:

           What    |Removed                     |Added
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                 CC|                            |intvnut at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36041