Low Level Bit Hacks You Absolutely Must Know

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jsc42 Permalink
October 21, 2010, 12:52

The problem is with the word 'rightmost' in the title. Like you, I initially assumed that it meant the final bit in the pattern; but what it is intended to mean is "Reset the first found bit that has a value of one when scanning from right to left", but that is a mouthful!

The affected bit in your example of 'xx10' is the '1' between the 'xx' and '0', which (as you correctly point out) is the bit that gets changed to 'xx00'. Rather than being an error, that is the intention of the hack.

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