eval/src/vespa/eval/eval/hamming_distance.h


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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.

#pragma once

namespace vespalib::eval {

inline double hamming_distance(double a, double b) {
    uint8_t x = (uint8_t) (int8_t) a;
    uint8_t y = (uint8_t) (int8_t) b;
    return __builtin_popcount(x ^ y);
}

}