pub inline fn transpose(m: Mat4x4) Mat4x4 {
    const d = m._data;
    var c1 = @shuffle(f32, d.vecs[0], d.vecs[1], [_]i32 { 2, 3, ~i32(2), ~i32(3)});
    var c2 = @shuffle(f32, d.vecs[2], d.vecs[3], [_]i32 { 2, 3, ~i32(2), ~i32(3)});
    var c3 = @shuffle(f32, d.vecs[0], d.vecs[1], [_]i32 { 0, 1, ~i32(0), ~i32(1)});
    var c4 = @shuffle(f32, d.vecs[2], d.vecs[3], [_]i32 { 0, 1, ~i32(0), ~i32(1)});

    return Mat4x4 {
        ._data = Mat4x4Data.setVecs(
            @shuffle(f32, c3, c4, [_]i32 {0, 2, ~i32(0), ~i32(2)}),
            @shuffle(f32, c3, c4, [_]i32 {1, 3, ~i32(1), ~i32(3)}),
            @shuffle(f32, c1, c2, [_]i32 {0, 2, ~i32(0), ~i32(2)}),
            @shuffle(f32, c1, c2, [_]i32 {1, 3, ~i32(1), ~i32(3)}),
        ),
    };
}