
    const b13 = b[1 * 4 + 3];
    const b20 = b[2 * 4 + 0];
    const b21 = b[2 * 4 + 1];
    const b22 = b[2 * 4 + 2];
    const b23 = b[2 * 4 + 3];
    const b30 = b[3 * 4 + 0];
    const b31 = b[3 * 4 + 1];
    const b32 = b[3 * 4 + 2];
    const b33 = b[3 * 4 + 3];
    const a00 = a[0 * 4 + 0];
    const a01 = a[0 * 4 + 1];
    const a02 = a[0 * 4 + 2];
    const a03 = a[0 * 4 + 3];
    const a10 = a[1 * 4 + 0];
    const a11 = a[1 * 4 + 1];
    const a12 = a[1 * 4 + 2];
    const a13 = a[1 * 4 + 3];
 