code: private static long SBOG_LPSti64(byte[] t, int i) {
          return (StreebogTables.sbob_sl64[0][t[i] & 0xFF] ^
                  StreebogTables.sbob_sl64[1][t[i + 8] & 0xFF] ^
                  StreebogTables.sbob_sl64[2][t[i + 16] & 0xFF] ^
                  StreebogTables.sbob_sl64[3][t[i + 24] & 0xFF] ^
                  StreebogTables.sbob_sl64[4][t[i + 32] & 0xFF] ^
                  StreebogTables.sbob_sl64[5][t[i + 40] & 0xFF] ^
                  StreebogTables.sbob_sl64[6][t[i + 48] & 0xFF] ^
                  StreebogTables.sbob_sl64[7][t[i + 56] & 0xFF]);
      }
docs: sbob_sl64[6][t.b[i + 48]] ^ sbob_sl64[7][t.b[i + 56]])