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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 ppereira on Tuesday July 26, 2011 @04:18PM (#2809286)
Intel has included BSF and BSR (bit scan forward / reverse) since 386, which would presumably also give you the magnitude of the power of 2.
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