log2.hh

Go to the documentation of this file.

#ifndef bqtNewNewLog2HH
#define bqtNewNewLog2HH
#include <cstdint>
 
static constexpr std::size_t log2floor(std::size_t n) { return n<2 ? 0 : (1+log2floor((n+1)/2)); }
 
static constexpr std::size_t log2ceil(std::size_t n)  { return log2floor(n) + !(n & (n-1));      }
 
#endif