How to reverse bits...

[Steve Resnick]

In article <1990Aug14.233308.27889 at caen.engin.umich.edu> jal at acc (John Lauro) writes:
>In article <1990Aug14.203212.16248 at motcad.portal.com> jtc at motcad.portal.com (J.T. Conklin) writes:
>>Another useful table is one that flips the bits 1-for-0,0-for-1.  This
>>is useful for inverting an image.
>
>How about:   (assuming 8 bit char c) 
>   c=255-c;  or
>   c^=255;
>
Why not use: ~c? on most machines I expect it would save CPU cycles as 
well as instructions.

Cheers!
Steve


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