tmp2 ^= tmp0;
        tmp3 ^= tmp1;
        tmp1 ^= tmp2;
        tmp0 ^= tmp3;

        tmp2 ^= lsft1;
        tmp3  = Long.rotateLeft(tmp3, ROTL_1);

        this.s0 = tmp0;
        this.s1 = tmp1;
        this.s2 = tmp2;
        this.s3 = tmp3;

        return result;
    }

    /**
     * Set seed.
     *
     * <p>At least one seed must be non-zero.
     *
     * @param s0Arg seed0
     * @param s1Arg seed1
     * @param s2Arg seed2
     * @param s3Arg seed3
     * @throws IllegalArgumentException At least one seed must be non-zero
     */
    public void setSeed(long s0Arg, long s1Arg, long s2Arg, long s3Arg)
            throws IllegalArgumentException {
        if ((s0Arg | s1Arg | s2Arg | s3Arg) == 0L) {
            throw new IllegalArgumentException(MSG_ILLSEED);
        }

        this.s0 = s0Arg;
        this.s1 = s1Arg;
        this.s2 = s2Arg;
        this.s3 = s3Arg;

        return;
    }

}