Everything about Find first set
Family of related bitwise operations on machine words
In computer software and hardware, find first set (ffs) or find first one is a bit operation which returns the index or position of the least significant 'one' bit in its argument, counting from the least significant bit. A related operation is count trailing zeros (ctz) or number of trailing zeros (ntz), which counts the number of zero bits following the least significant one bit. There are two common variants of find first set, the POSIX definition which starts indexing of bits at 1, herein labelled ffs, and the variant which starts indexing of bits at zero, which is equivalent to ctz. Wikipedia →
đź§ Start here: a 6-step reading path
- Read the overview: Find first setA 5-minute orientation
- Pick up a classic book: Romeo and JulietThe most-reprinted book on the subject
- Go sideways: Hamming weightA closely related topic
- Go sideways: Bit manipulationA closely related topic
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📚 Books worth reading
Romeo and JulietWilliam Shakespeare · 1597
The TempestWilliam Shakespeare · 1611
The Night Before ChristmasClement Clarke Moore · 1857
The Boxcar ChildrenGertrude Chandler Warner · 1924
Baby EinsteinJulie Aigner-Clark, Nadeem Zaidi · 2001
Objects first with JavaDavid J. Barnes, Michael Kolling · 2002
Nickelodeon PAW PatrolEmily Skwish, Fabrizio Petrossi · 2016
Sesame StreetClaire Winslow, Barry Goldberg · 2019
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