MathAlgo.java

private int julery_isqrt(int val) {
    int temp, g = 0, b = 0x8000, bshft = 15;
    do {
        if (val >= (temp = (((g << 1) + b) << bshft--))) {
            g += b;
            val -= temp;
        }
    } while ((b >>= 1) > 0);
    return g;
}