Function nextpow2

src/backend/common/dispatch.cpp:12–20

#include "dispatch.hpp"

unsigned nextpow2(unsigned x) {
    x = x - 1U;
    x = x | (x >> 1U);
    x = x | (x >> 2U);
    x = x | (x >> 4U);
    x = x | (x >> 8U);
    x = x | (x >> 16U);
    return x + 1U;
}