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A comment on Ten Ways to Check if an Integer Is a Power Of Two in C. Parent comment

Re:Ten Ways to Check if an Integer Is a Power Of Two in C by neckbeard on Tuesday July 26, 2011 @07:29PM (#2809961)
GCC 4.4 isn't very recent, but it generates a popcnt with -msse4.2.

GCC 4.5, using popcnt on my Core-i7 860 takes the trivial loop mentioned using "Complement and Compare" from ~10.5s to ~7.5s

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