All pastes #745382 Raw Edit

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public text v1 · immutable
·published 2007-10-22 11:07 UTC
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// Based on the Bit Twiddling Hacks by Sean Eron Anderson
// In the public domain
unsigned int log2int(unsigned int i) {
    unsigned r = 0;
    while (i >>= 1)
        r++;
    return r;
}