Previous power of 2

Posted by Horacio on Stack Overflow See other posts from Stack Overflow or by Horacio
Published on 2010-04-21T01:50:50Z Indexed on 2010/04/21 1:53 UTC
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power

There is a lot of information on how to find the next power of 2 of a given value (see refs) but I cannot find any to get the previous power of two.

The only way I find so far is to keep a table with all power of two up to 2^64 and make a simple lookup.

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Previous power of 2 - Developer IT

Previous power of 2

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Related posts about power

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Which power USB hub uses if it has external power supply as well

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Turn a Computer Power Supply into a Desktop Power Supply

How to prevent screen locking when lid is closed?

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