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===Scanning with Reset===
A win of abstraction is to use a combined [[BitScan#BitscanwithReset|bitscan with reset]] found bit routine. This is fine. But probably harder for compilers to generate optimal code in the if-do-while-sense, where reset last bit already sets the zero-flag. If you don't care on such micro-optimizations, this is the preferred control structure<ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=70202 CPW bitscan with reset could someone explain this line?] by [[Mahmoud Uthman]], [[CCC]], March 14, 2019</ref>.
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while ( x ) {
